prueba tecnica

2025-06-15 18:29:25 +02:00
parent 9758ee0bc6
commit d97e55a83f
127 changed files with 6488 additions and 1 deletions
--- a/.dockerignore
+++ b/.dockerignore
@@ -0,0 +1,9 @@
+**/node_modules
+**/bin
+**/obj
+.vscode
+.idea
+.git
+*.log
+Dockerfile
+docker-compose.yml
--- a/.pdf
+++ b/.pdf
--- a/README.md
+++ b/README.md
@@ -1,2 +1,108 @@
-# prueba_tecnica_proxima
+# 🚀 Guía rápida para poner el proyecto en marcha
+## 🔧 Stack requerido
+
+Docker	Opcional. https://www.docker.com/
+
+(Este proyecto ha sido desarrollado con Docker para la base de datos en local
+por lo que es muy recomendable usarlo)
+
+Node.js & npm	Cualquier versión LTS reciente (18 +)
+https://nodejs.org/es
+
+.NET 8 SDK	Necesario para el backend
+https://dotnet.microsoft.com/es-es/download
+
+Si no consigues levantar el proyecto, puedes verlo funcionando en https://quediaempiezo.asarmientotest.es/
+
+# Levantar proyecto en local 
+
+## 1. Clona el repo:
+
+    git clone https://gitea.alexdev.es/alex/prueba_tecnica_proxima.git
+    cd prueba_tecnica_proxima
+
+## 1. Arrancar la base de datos 📦
+
+### desde la raíz del repo
+
+    cd levantarDBSola
+
+    docker compose up -d
+
+La imagen de Postgres 16 se inicializa y ejecuta automáticamente los scripts de ../../db
+(creación de tablas, datos y funciones).
+
+Cuando el contenedor esté listo puedes cerrar esta terminal.
+
+### OJO!!! Si no vas a usar docker:
+Crea la base de datos ejecutando en orden todos los scripts de la carpeta 
+
+## 2. Levantar el backend ⚙️
+
+### desde la raíz del repo
+    cd backend/ProximaContracts/ProximaContracts.API
+
+    dotnet run           # puerto 5009 por defecto
+
+### Si prefieres un IDE:
+
+    abre la solución backend/ProximaContracts/ProximaContracts.sln en Visual Studio o Rider y ejecuta la API.
+
+
+Swagger: http://localhost:5009/swagger/index.html
+
+si ejecutas con Visual Studio irás directo al swagger
+
+## 3. Iniciar el frontend 🎨
+
+
+    cd front/contracts-frontend
+
+    npm install
+
+    npm run dev          # puerto 5173
+
+Visita: http://localhost:5173/ y ¡listo!
+
+
+## 🌐 Despliegue en producción
+Clona el repo:
+
+    git clone https://gitea.alexdev.es/alex/prueba_tecnica_proxima.git
+    cd prueba_tecnica_proxima
+    
+### Configura CORS
+Edita backend/ProximaContracts/ProximaContracts.API/appsettings.json
+y pon la URL de tu dominio.
+
+### Convigura .env.production
+Edita prueba_tecnica_proxima/front/contracts-frontend/.env.production
+usando la misma url acabada en /api
+
+Compila y arranca:
+
+    chmod +x deploy.sh     # (solo la primera vez)
+    ./deploy.sh
+
+### DNS + HTTPS
+
+Asegúrate de que el dominio apunta al servidor.
+
+Caddy gestionará automáticamente los certificados Let’s Encrypt.
+
+Ejemplo desplegado: https://quediaempiezo.asarmientotest.es/
+
+## 🎨 Imágenes
+
+### Todas las imágenes se encuentran en la carpeta images en la raíz del proyecto
+
+| ![](images/Responsive2.png) | ![](images/Responsive7.png) | ![](images/Responsive4.png) |
+|:--:|:--:|:--:|
+| ![](images/validationExample.png) | ![](images/ValidationExampleDNI1.png) | ![](images/SelectTarifaEnCreate.png) |
+
+
+
+# 🤝 Contacto
+¿Dudas o sugerencias?
+📧 contact@asarmiento.es  |  📞 Llámame cuando quieras.

--- a/backend/ProximaContracts/ProximaContracts.API/Controllers/ContractsController.cs
+++ b/backend/ProximaContracts/ProximaContracts.API/Controllers/ContractsController.cs
@@ -0,0 +1,58 @@
+using Microsoft.AspNetCore.Mvc;
+using ProximaContracts.Application.Contracts.Services;
+using ProximaContracts.Domain.Contracts.DTOs.Request;
+
+namespace ProximaContracts.API.Controllers
+{
+    [Route("api/[controller]")]
+    [ApiController]
+    public class ContractsController(IContractService service) : ControllerBase
+    {
+        private readonly IContractService _service = service;
+
+
+        [HttpGet("GetAll")]
+        public async Task<IActionResult> GetContracts()
+        {
+            var response = await _service.GetContracts();
+            return response.Any()  ? Ok(response) : NotFound();
+        }
+
+
+        [HttpGet("GetById")]
+        public async Task<IActionResult> GetContractsById([FromQuery] ContractByIdRequestDto dto)
+        {
+            var response = await _service.GetContractById(dto);
+            return response != null ? Ok(response) : NotFound();
+        }
+
+        [HttpPost("CreateContract")]
+        public async Task<IActionResult> CreateContract([FromBody] CreateContractRequestDto dto)
+        {
+            var result = await _service.CreateContract(dto);
+            if(result.IsCreated)
+            {
+                return Ok(result);
+            }
+            else
+            {
+                return BadRequest(result);
+            }
+        }
+
+        [HttpPut("UpdateContract")]
+        public async Task<IActionResult> UpdateContract([FromBody]  UpdateContractRequestDto dto)
+        {
+            var result = await _service.UpdateContract(dto);
+
+            if (result.IsUpdated)
+            {
+                return Ok(result);
+            }
+            else
+            {
+                return BadRequest(result);
+            }
+        }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.API/Controllers/RatesController.cs
+++ b/backend/ProximaContracts/ProximaContracts.API/Controllers/RatesController.cs
@@ -0,0 +1,17 @@
+using Microsoft.AspNetCore.Mvc;
+using ProximaContracts.Application.Rates.Services;
+
+namespace ProximaContracts.API.Controllers
+{
+    [Route("api/[controller]")]
+    [ApiController]
+    public class RatesController(IRateService service) : ControllerBase
+    {
+        private readonly IRateService _service = service;
+        [HttpGet("GetAllRates")]
+        public async Task<IActionResult> GetAllRates()
+        {
+            return Ok(await _service.GetRates());
+        }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.API/Middleware/ExceptionHandlingMiddleware.cs
+++ b/backend/ProximaContracts/ProximaContracts.API/Middleware/ExceptionHandlingMiddleware.cs
@@ -0,0 +1,69 @@
+using ProximaContracts.Shared.Exceptions.Repositories.Contract;
+using ProximaContracts.Shared.Exceptions.Repositories.Rates;
+using System.Diagnostics.Contracts;
+using System.Net;
+using System.Text.Json;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace ProximaContracts.API.Middleware
+{
+    public sealed class ExceptionHandlingMiddleware
+    {
+        private readonly RequestDelegate _next;
+        private readonly ILogger<ExceptionHandlingMiddleware> _logger;
+
+        public ExceptionHandlingMiddleware(
+            RequestDelegate next,
+            ILogger<ExceptionHandlingMiddleware> logger)
+        {
+            _next = next;
+            _logger = logger;
+        }
+
+        public async Task InvokeAsync(HttpContext context)
+        {
+            try
+            {
+                await _next(context);
+            }
+            catch (Exception ex)
+            {
+
+                _logger.LogError(ex, "Unhandled exception");
+                await HandleExceptionAsync(context, ex);
+            }
+        }
+
+        private static Task HandleExceptionAsync(HttpContext ctx, Exception ex)
+        {
+           
+            (HttpStatusCode code, string title) mapping = ex switch
+            {
+                GetContractByIdException => (HttpStatusCode.InternalServerError, "Error getting contract by Id."),
+                GetContractsException => (HttpStatusCode.InternalServerError, "Error getting all contracts."),
+                CreateContractException => (HttpStatusCode.InternalServerError, "Error creating contract."),
+                CreateContractRateNotFoundException => (HttpStatusCode.BadRequest, "Error creating contract =>Rate not found."),
+                UpdateContractException => (HttpStatusCode.InternalServerError, "Error updating contract."),
+                CheckIfRateIdExistsException =>(HttpStatusCode.InternalServerError, "Error checking rates."),
+                GetAllRatesException => (HttpStatusCode.InternalServerError, "Error getting all rates."),
+                GetAllRates404Exception =>(HttpStatusCode.NotFound, "No Rates found."),
+                _ => (HttpStatusCode.InternalServerError, $"Internal server error.")
+            };
+            
+            var problem = new
+            {
+                type = $"https://httpstatuses.com/{(int)mapping.code}",
+                title = mapping.title,
+                status = (int)mapping.code,
+                detail = ex.Message,
+                instance = ctx.Request.Path
+            };
+
+            string json = JsonSerializer.Serialize(problem);
+            ctx.Response.ContentType = "application/problem+json";
+            ctx.Response.StatusCode = (int)mapping.code;
+            return ctx.Response.WriteAsync(json);
+        }
+    }
+
+}
--- a/backend/ProximaContracts/ProximaContracts.API/Program.cs
+++ b/backend/ProximaContracts/ProximaContracts.API/Program.cs
@@ -0,0 +1,51 @@
+using ProximaContracts.API.Middleware;
+using ProximaContracts.Application;
+
+var builder = WebApplication.CreateBuilder(args);
+
+
+builder.Services.AddCors(options =>
+{
+    options.AddPolicy("Loopback", p =>
+        p.SetIsOriginAllowed(o => new Uri(o).IsLoopback)
+         .AllowAnyHeader()
+         .AllowAnyMethod()
+         .AllowCredentials());
+
+options.AddPolicy("ProdDomains", p =>
+        p.WithOrigins(builder.Configuration
+              .GetSection("Cors:AllowedOrigins").Get<string[]>() ?? Array.Empty<string>())
+         .AllowAnyHeader()
+         .AllowAnyMethod()
+         .AllowCredentials());
+});
+
+builder.Services.AddApplicationDependencies();
+
+// Add services to the container.
+
+builder.Services.AddControllers();
+// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+
+
+var app = builder.Build();
+
+app.UseMiddleware<ExceptionHandlingMiddleware>();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseCors(app.Environment.IsDevelopment() ? "Loopback" : "ProdDomains");
+
+app.UseAuthorization();
+
+app.MapControllers();
+
+app.Run();
--- a/backend/ProximaContracts/ProximaContracts.API/Properties/launchSettings.json
+++ b/backend/ProximaContracts/ProximaContracts.API/Properties/launchSettings.json
@@ -0,0 +1,31 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:27614",
+      "sslPort": 0
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "applicationUrl": "http://localhost:5009",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}
--- a/backend/ProximaContracts/ProximaContracts.API/ProximaContracts.API.csproj
+++ b/backend/ProximaContracts/ProximaContracts.API/ProximaContracts.API.csproj
@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="AutoMapper" Version="14.0.0" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.6.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ProximaContracts.Application\ProximaContracts.Application.csproj" />
+    <ProjectReference Include="..\ProximaContracts.Shared\ProximaContracts.Shared.csproj" />
+  </ItemGroup>
+
+</Project>
--- a/backend/ProximaContracts/ProximaContracts.API/ProximaContracts.API.http
+++ b/backend/ProximaContracts/ProximaContracts.API/ProximaContracts.API.http
@@ -0,0 +1,2 @@
+@ProximaContracts.API_HostAddress = http://localhost:5009
+
--- a/backend/ProximaContracts/ProximaContracts.API/appsettings.Development.json
+++ b/backend/ProximaContracts/ProximaContracts.API/appsettings.Development.json
@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}
--- a/backend/ProximaContracts/ProximaContracts.API/appsettings.json
+++ b/backend/ProximaContracts/ProximaContracts.API/appsettings.json
@@ -0,0 +1,17 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "ConnectionStrings": {
+    "PostgreSQL": "Host=localhost;Port=5432;Database=db.ProximaContracts;Username=proxima_user;Password=Proxima_Password"
+  },
+  "Cors": {
+    "AllowedOrigins": [
+      "https://quediaempiezo.asarmientotest.es"      
+    ]
+  },
+  "AllowedHosts": "*"
+}
--- a/backend/ProximaContracts/ProximaContracts.Application/Contracts/Services/ContractService.cs
+++ b/backend/ProximaContracts/ProximaContracts.Application/Contracts/Services/ContractService.cs
@@ -0,0 +1,56 @@
+using AutoMapper;
+using ProximaContracts.Application.Rates.Services;
+using ProximaContracts.Domain.Contracts.DTOs.Request;
+using ProximaContracts.Domain.Contracts.DTOs.Response;
+using ProximaContracts.Infrastructure.Rpositories.Contracts;
+using ProximaContracts.Shared.Exceptions.Repositories.Contract;
+
+namespace ProximaContracts.Application.Contracts.Services
+{
+    public class ContractService(IContractRepository repository, IMapper mapper, IRateService rateService) : IContractService
+    {
+        private readonly IContractRepository _repository = repository;
+        private readonly IMapper _mapper = mapper;
+        private readonly IRateService _rateService = rateService;
+        public async Task<ContractByIdResponseDto> GetContractById(ContractByIdRequestDto dto)
+        {
+            var result = await _repository.GetContractById(dto);
+            return _mapper.Map< ContractByIdResponseDto>(result);
+        }
+
+        public async Task<IEnumerable<GetContractsResponseDto>> GetContracts()
+        {
+            var result = await _repository.GetContracts();
+            return _mapper.Map<List<GetContractsResponseDto>>(result);
+        }
+
+        public async Task<CreateContractResponseDto> CreateContract(CreateContractRequestDto dto)
+        {
+            var rateExists = await _rateService.CheckIfExists(dto.RateId);
+            if (!rateExists)
+            {
+                throw new CreateContractRateNotFoundException($"No rate found with id: {dto.RateId}, Contract can't be created.");
+            }
+            var result = await _repository.CreateContract(dto);
+
+            return new CreateContractResponseDto()
+            {
+                IsCreated = result.HasValue ? true : false,
+                Message = result.HasValue ? "Created" : "Error creating contract",
+                NewContractId = result.HasValue ? result.Value : 0
+            };
+            
+        }
+
+        public async Task<UpdateContractResponseDto> UpdateContract(UpdateContractRequestDto dto)
+        {
+            var result = await _repository.UpdateContract(dto);
+            return new UpdateContractResponseDto()
+            {
+                IsUpdated = result.HasValue ? true : false,
+                Message = result.HasValue ? "Updated" : "Error updating contract",
+                ContractId = result.HasValue ? result.Value : 0
+            };
+        }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Application/Contracts/Services/IContractService.cs
+++ b/backend/ProximaContracts/ProximaContracts.Application/Contracts/Services/IContractService.cs
@@ -0,0 +1,14 @@
+using ProximaContracts.Domain.Contracts.DTOs.Request;
+using ProximaContracts.Domain.Contracts.DTOs.Response;
+
+namespace ProximaContracts.Application.Contracts.Services
+{
+    public interface IContractService
+    {
+        
+        Task<ContractByIdResponseDto> GetContractById(ContractByIdRequestDto dto);
+        Task<IEnumerable<GetContractsResponseDto>> GetContracts();
+        Task<CreateContractResponseDto> CreateContract(CreateContractRequestDto dto);
+        Task<UpdateContractResponseDto> UpdateContract(UpdateContractRequestDto dto);
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Application/IoCConfiguration.cs
+++ b/backend/ProximaContracts/ProximaContracts.Application/IoCConfiguration.cs
@@ -0,0 +1,37 @@
+using Microsoft.Extensions.DependencyInjection;
+using ProximaContracts.Application.Contracts.Services;
+using ProximaContracts.Application.Rates.Services;
+using ProximaContracts.Domain.Contracts.Mappings;
+using ProximaContracts.Infrastructure.Rpositories.Contracts;
+using ProximaContracts.Infrastructure.Rpositories.Rates;
+
+namespace ProximaContracts.Application
+{
+    public static class IoCConfiguration
+    {
+        public static IServiceCollection AddApplicationDependencies(this IServiceCollection services)
+        {
+            AddServices(services);
+            AddRepositories(services);
+            AddAutommaperProfiles(services);
+
+            return services;
+        }
+
+        private static void AddServices(IServiceCollection services)
+        {            
+            services.AddScoped<IContractService, ContractService>();          
+            services.AddScoped<IRateService, RateService>();
+        }
+        private static void AddRepositories(IServiceCollection services)
+        {
+            services.AddScoped<IContractRepository, ContractRepository>();            
+            services.AddScoped<IRateRepository, RateRepository>();
+        }
+        private static void AddAutommaperProfiles(IServiceCollection services)
+        {
+            services.AddAutoMapper(typeof(ContractProfile).Assembly);
+            services.AddAutoMapper(typeof(RateProfile).Assembly);
+        }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Application/ProximaContracts.Application.csproj
+++ b/backend/ProximaContracts/ProximaContracts.Application/ProximaContracts.Application.csproj
@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="8.0.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ProximaContracts.Domain\ProximaContracts.Domain.csproj" />
+    <ProjectReference Include="..\ProximaContracts.Infrastructure\ProximaContracts.Infrastructure.csproj" />
+    <ProjectReference Include="..\ProximaContracts.Shared\ProximaContracts.Shared.csproj" />
+  </ItemGroup>
+
+</Project>
--- a/backend/ProximaContracts/ProximaContracts.Application/Rates/Services/IRateService.cs
+++ b/backend/ProximaContracts/ProximaContracts.Application/Rates/Services/IRateService.cs
@@ -0,0 +1,10 @@
+using ProximaContracts.Domain.Rates.DTOs.Responses;
+
+namespace ProximaContracts.Application.Rates.Services
+{
+    public interface IRateService
+    {
+        Task<bool> CheckIfExists(int id);
+        Task<IEnumerable<GetAllRatesDto>> GetRates();
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Application/Rates/Services/RateService.cs
+++ b/backend/ProximaContracts/ProximaContracts.Application/Rates/Services/RateService.cs
@@ -0,0 +1,29 @@
+using AutoMapper;
+using ProximaContracts.Domain.Rates.DTOs.Responses;
+using ProximaContracts.Infrastructure.Rpositories.Rates;
+using ProximaContracts.Shared.Exceptions.Repositories.Rates;
+
+namespace ProximaContracts.Application.Rates.Services
+{
+    public class RateService(IRateRepository repository, IMapper mapper) : IRateService
+    {
+        private readonly IRateRepository _repository = repository;
+        private readonly IMapper _mapper = mapper;
+
+        public async Task<bool> CheckIfExists(int id)
+        {
+            return await _repository.CheckIfExists(id);
+        }
+
+        public async Task<IEnumerable<GetAllRatesDto>> GetRates()
+        {
+            var response = await _repository.GetRates();
+            if (!response.Any())
+            {
+                throw new GetAllRates404Exception("No Rates found");
+            }
+            return _mapper.Map<List<GetAllRatesDto>>(response);
+        }
+
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Request/ContractByIdRequestDto.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Request/ContractByIdRequestDto.cs
@@ -0,0 +1,7 @@
+namespace ProximaContracts.Domain.Contracts.DTOs.Request
+{
+    public  class ContractByIdRequestDto
+    {
+        public int Id { get; set; }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Request/CreateContractRequestDto.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Request/CreateContractRequestDto.cs
@@ -0,0 +1,20 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace ProximaContracts.Domain.Contracts.DTOs.Request
+{
+    public class CreateContractRequestDto
+    {
+        [Required]
+        [MaxLength(20)]
+        public string ContractorIdNumber { get; set; } = null!;
+        [Required]
+        [MaxLength(50)]
+        public string ContractorName { get; set; } = null!;
+        [Required]
+        [MaxLength(100)]
+        public string ContractorSurname { get; set; } = null!;
+        [Required]
+        [Range(1, int.MaxValue, ErrorMessage = "RateId must be greater than 0.")]
+        public int RateId { get; set; }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Request/UpdateContractRequestDto.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Request/UpdateContractRequestDto.cs
@@ -0,0 +1,16 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace ProximaContracts.Domain.Contracts.DTOs.Request
+{
+    public class UpdateContractRequestDto
+    {
+        [Required]
+        public int ContractId { get; set; }
+        [Required]
+        public int RateId { get; set; }
+        public string? ContractorIdNumber { get; set; }
+        public string? ContractorName { get; set; }
+        public string? ContractorSurname { get; set; }
+        public DateTime? ContractInitDate { get; set; }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Response/ContractByIdResponseDto.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Response/ContractByIdResponseDto.cs
@@ -0,0 +1,14 @@
+namespace ProximaContracts.Domain.Contracts.DTOs.Response
+{
+    public class ContractByIdResponseDto
+    {
+        public int Id { get; set; }
+        public string ContractorIdNumber { get; set; }
+        public string ContractorName { get; set; }
+        public string ContractorSurname { get; set; }
+        public DateTime ContractInitDate { get; set; }
+        public int RateId { get; set; }
+        public string RateName { get; set; }
+        public decimal RatePrice { get; set; }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Response/CreateContractResponseDto.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Response/CreateContractResponseDto.cs
@@ -0,0 +1,9 @@
+namespace ProximaContracts.Domain.Contracts.DTOs.Response
+{
+    public  class CreateContractResponseDto
+    {
+        public bool IsCreated { get; set; }
+        public int NewContractId { get; set; }
+        public string Message { get; set; }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Response/GetContractsResponseDto.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Response/GetContractsResponseDto.cs
@@ -0,0 +1,11 @@
+namespace ProximaContracts.Domain.Contracts.DTOs.Response
+{
+    public class GetContractsResponseDto
+    {
+        public int Id { get; set; }
+        public string ContractorName { get; set; }
+        public string ContractorSurname { get; set; }
+        public DateTime ContractInitDate { get; set; }
+        public string RateName { get; set; }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Response/UpdateContractResponseDto.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Contracts/DTOs/Response/UpdateContractResponseDto.cs
@@ -0,0 +1,9 @@
+namespace ProximaContracts.Domain.Contracts.DTOs.Response
+{
+    public class UpdateContractResponseDto
+    {
+        public bool IsUpdated { get; set; }
+        public int ContractId { get; set; }
+        public string Message { get; set; }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Contracts/Entities/ContractByIdEntity.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Contracts/Entities/ContractByIdEntity.cs
@@ -0,0 +1,14 @@
+namespace ProximaContracts.Domain.Contracts.Entities
+{
+    public class ContractByIdEntity
+    {
+        public int Id { get; set; }
+        public string ContractorIdNumber { get; set; }
+        public string ContractorName { get; set; }
+        public string ContractorSurname { get; set; }
+        public DateTime ContractInitDate { get; set; }
+        public int RateId { get; set; }
+        public string RateName { get; set; }
+        public decimal RatePrice { get; set; }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Contracts/Entities/GetContractsEntity.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Contracts/Entities/GetContractsEntity.cs
@@ -0,0 +1,11 @@
+namespace ProximaContracts.Domain.Contracts.Entities
+{
+    public class GetContractsEntity
+    {
+        public int Id { get; set; }
+        public string ContractorName { get; set; }
+        public string ContractorSurname { get; set; }
+        public DateTime ContractInitDate { get; set; }
+        public string RateName { get; set; }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Contracts/Mappings/ContractProfile.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Contracts/Mappings/ContractProfile.cs
@@ -0,0 +1,40 @@
+using AutoMapper;
+using Npgsql;
+using ProximaContracts.Domain.Contracts.DTOs.Response;
+using ProximaContracts.Domain.Contracts.Entities;
+
+namespace ProximaContracts.Domain.Contracts.Mappings
+{
+    public class ContractProfile : Profile
+    {
+        public ContractProfile()
+        {
+            #region Contract By ID
+            CreateMap<NpgsqlDataReader, ContractByIdEntity>()
+                .ForMember(d => d.Id, o => o.MapFrom(s => s.GetInt32(s.GetOrdinal("Id"))))
+                .ForMember(d => d.ContractorIdNumber, o => o.MapFrom(s => s.GetString(s.GetOrdinal("ContractorIdNumber"))))
+                .ForMember(d => d.ContractorName, o => o.MapFrom(s => s.GetString(s.GetOrdinal("ContractorName"))))
+                .ForMember(d => d.ContractorSurname, o => o.MapFrom(s => s.GetString(s.GetOrdinal("ContractorSurname"))))
+                .ForMember(d => d.ContractInitDate, o => o.MapFrom(s => s.GetDateTime(s.GetOrdinal("ContractInitDate"))))
+                .ForMember(d => d.RateId, o => o.MapFrom(s => s.GetInt32(s.GetOrdinal("RateId"))))
+                .ForMember(d => d.RateName, o => o.MapFrom(s => s.GetString(s.GetOrdinal("RateName"))))
+                .ForMember(d => d.RatePrice, o => o.MapFrom(s => s.GetFieldValue<decimal>(s.GetOrdinal("RatePrice"))))
+                ;
+
+            CreateMap<ContractByIdEntity, ContractByIdResponseDto>();
+            #endregion ContractByID
+
+            #region Contracts All
+            CreateMap<NpgsqlDataReader, GetContractsEntity>()
+                .ForMember(d => d.Id, o => o.MapFrom(s => s.GetInt32(s.GetOrdinal("Id"))))
+                .ForMember(d => d.ContractorName, o => o.MapFrom(s => s.GetString(s.GetOrdinal("ContractorName"))))
+                .ForMember(d => d.ContractorSurname, o => o.MapFrom(s => s.GetString(s.GetOrdinal("ContractorSurname"))))
+                .ForMember(d => d.ContractInitDate, o => o.MapFrom(s => s.GetDateTime(s.GetOrdinal("ContractInitDate"))))
+                .ForMember(d => d.RateName, o => o.MapFrom(s => s.GetString(s.GetOrdinal("RateName"))))
+                ;
+
+            CreateMap<GetContractsEntity, GetContractsResponseDto>();
+            #endregion Contracts All
+        }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/ProximaContracts.Domain.csproj
+++ b/backend/ProximaContracts/ProximaContracts.Domain/ProximaContracts.Domain.csproj
@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="AutoMapper" Version="14.0.0" />
+    <PackageReference Include="Npgsql" Version="8.0.7" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ProximaContracts.Shared\ProximaContracts.Shared.csproj" />
+  </ItemGroup>
+
+</Project>
--- a/backend/ProximaContracts/ProximaContracts.Domain/Rates/DTOs/Responses/GetAllRatesDto.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Rates/DTOs/Responses/GetAllRatesDto.cs
@@ -0,0 +1,11 @@
+using System.Data.SqlTypes;
+
+namespace ProximaContracts.Domain.Rates.DTOs.Responses
+{
+    public class GetAllRatesDto
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public decimal Price { get; set; }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Rates/Entities/RateEntity.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Rates/Entities/RateEntity.cs
@@ -0,0 +1,11 @@
+using System.Data.SqlTypes;
+
+namespace ProximaContracts.Domain.Rates.Entities
+{
+    public class RateEntity
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public decimal Price { get; set; }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Domain/Rates/Mappings/ContractProfile.cs
+++ b/backend/ProximaContracts/ProximaContracts.Domain/Rates/Mappings/ContractProfile.cs
@@ -0,0 +1,23 @@
+using AutoMapper;
+using Npgsql;
+using ProximaContracts.Domain.Rates.DTOs.Responses;
+using ProximaContracts.Domain.Rates.Entities;
+
+namespace ProximaContracts.Domain.Contracts.Mappings
+{
+    public class RateProfile : Profile
+    {
+        public RateProfile()
+        {
+           #region Rates All
+            CreateMap<NpgsqlDataReader, RateEntity>()
+                .ForMember(d => d.Id, o => o.MapFrom(s => s.GetInt32(s.GetOrdinal("Id"))))
+                .ForMember(d => d.Name, o => o.MapFrom(s => s.GetString(s.GetOrdinal("Name"))))
+                .ForMember(d => d.Price, o => o.MapFrom(r => r.GetDecimal(r.GetOrdinal("Price"))))
+                ;
+
+            CreateMap<RateEntity, GetAllRatesDto>();
+            #endregion Rates All
+        }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Infrastructure/ProximaContracts.Infrastructure.csproj
+++ b/backend/ProximaContracts/ProximaContracts.Infrastructure/ProximaContracts.Infrastructure.csproj
@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="9.0.6" />
+    <PackageReference Include="Npgsql" Version="8.0.7" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ProximaContracts.Domain\ProximaContracts.Domain.csproj" />
+    <ProjectReference Include="..\ProximaContracts.Shared\ProximaContracts.Shared.csproj" />
+  </ItemGroup>
+
+</Project>
--- a/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Contracts/ContractFunctionsStatements.cs
+++ b/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Contracts/ContractFunctionsStatements.cs
@@ -0,0 +1,12 @@
+public static class ContractFS
+{
+    public static string GetContractById = "SELECT * FROM public.get_contract_by_id(@p_contract_id);";
+    public static string GetContracts = "SELECT * FROM public.get_contracts();";
+    public static string CreateContract = "SELECT * FROM public.create_contract(@p_contractor_id_number, @p_contractor_name, @p_contractor_surname, @p_contract_init_date, @p_rate_id);";
+    public static string UpdateContract = """                
+                SELECT * FROM public.update_contract(@p_contract_id, @p_rate_id, @p_contractor_id_number,                
+                @p_contractor_name, @p_contractor_surname, @p_contract_init_date)                
+                """;
+
+
+}
--- a/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Contracts/ContractRepository.cs
+++ b/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Contracts/ContractRepository.cs
@@ -0,0 +1,137 @@
+using AutoMapper;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+using Npgsql;
+using NpgsqlTypes;
+using ProximaContracts.Domain.Contracts.DTOs.Request;
+using ProximaContracts.Domain.Contracts.Entities;
+using ProximaContracts.Shared.Exceptions.Repositories.Contract;
+
+namespace ProximaContracts.Infrastructure.Rpositories.Contracts
+{
+    public class ContractRepository(IConfiguration config, ILogger<ContractRepository> logger, IMapper mapper) : IContractRepository
+    {
+        private readonly string _connStr = config.GetConnectionString("PostgreSQL")!;
+        private readonly ILogger<ContractRepository> _log = logger;
+        private readonly IMapper _mapper = mapper;
+
+        public async Task<ContractByIdEntity?> GetContractById(ContractByIdRequestDto dto)
+        {
+            await using var conn = new NpgsqlConnection(_connStr);
+            await conn.OpenAsync();
+            try
+            {
+                await using var cmd = new NpgsqlCommand(ContractFS.GetContractById, conn);
+                cmd.Parameters.AddWithValue("p_contract_id", NpgsqlDbType.Integer, dto.Id);
+
+                await using NpgsqlDataReader reader = await cmd.ExecuteReaderAsync();
+                if (!await reader.ReadAsync()) return null; 
+
+                return _mapper.Map<ContractByIdEntity>(reader);
+            }
+            catch (Exception ex)
+            {
+                _log.LogError(ex.Message);
+                throw new GetContractByIdException(ex.Message);
+            }
+            finally
+            {
+                await conn.CloseAsync();
+            }
+         }
+
+        public async Task<IEnumerable<GetContractsEntity>> GetContracts()
+        {
+            await using var conn = new NpgsqlConnection(_connStr);
+            await conn.OpenAsync();
+            try
+            {
+                await using var cmd = new NpgsqlCommand(ContractFS.GetContracts, conn);
+
+                await using NpgsqlDataReader reader = await cmd.ExecuteReaderAsync();
+                var results = new List<GetContractsEntity>();
+
+                while (await reader.ReadAsync())
+                {
+                    results.Add(_mapper.Map<GetContractsEntity>(reader));
+                }
+
+                return results;
+            }
+            catch (Exception ex)
+            {
+                _log.LogError(ex.Message);
+                throw new GetContractsException(ex.Message);
+            }
+            finally
+            {
+                await conn.CloseAsync();
+            }
+        }
+
+        public async Task<int?> CreateContract(CreateContractRequestDto dto)
+        {
+            await using var conn = new NpgsqlConnection(_connStr);
+            await conn.OpenAsync();
+
+            try
+            {                
+                await using var cmd = new NpgsqlCommand(ContractFS.CreateContract, conn);
+                cmd.Parameters.AddWithValue("p_contractor_id_number", NpgsqlDbType.Varchar, dto.ContractorIdNumber);
+                cmd.Parameters.AddWithValue("p_contractor_name", NpgsqlDbType.Varchar, dto.ContractorName);
+                cmd.Parameters.AddWithValue("p_contractor_surname", NpgsqlDbType.Varchar, dto.ContractorSurname);
+                cmd.Parameters.AddWithValue("p_contract_init_date", NpgsqlDbType.Timestamp, DateTime.Now);
+                cmd.Parameters.AddWithValue("p_rate_id", NpgsqlDbType.Integer, dto.RateId);
+
+                await using NpgsqlDataReader reader = await cmd.ExecuteReaderAsync();
+                if (!await reader.ReadAsync()) return null;
+
+                var result = reader.GetInt32(reader.GetOrdinal("create_contract"));
+                return result;
+            }
+            catch (Exception ex)
+            {
+                _log.LogError(ex.Message);
+                throw new CreateContractException(ex.Message);
+            }
+            finally
+            {
+                await conn.CloseAsync();
+            }
+        }
+
+        public async Task<int?> UpdateContract(UpdateContractRequestDto dto)
+        {
+            await using var conn = new NpgsqlConnection(_connStr);
+            await conn.OpenAsync();
+            try
+            {
+                await using var cmd = new NpgsqlCommand(ContractFS.UpdateContract, conn);
+                cmd.Parameters.AddWithValue("p_contract_id", NpgsqlDbType.Integer, dto.ContractId);
+                cmd.Parameters.AddWithValue("p_rate_id", NpgsqlDbType.Integer, dto.RateId);
+
+                cmd.Parameters.AddWithValue("p_contractor_id_number", NpgsqlDbType.Varchar, dto.ContractorIdNumber != null ? dto.ContractorIdNumber : DBNull.Value);
+
+                cmd.Parameters.AddWithValue("p_contractor_name", NpgsqlDbType.Varchar, dto.ContractorName != null ? dto.ContractorName : DBNull.Value);
+                cmd.Parameters.AddWithValue("p_contractor_surname", NpgsqlDbType.Varchar, dto.ContractorSurname != null ? dto.ContractorSurname : DBNull.Value);
+                cmd.Parameters.AddWithValue("p_contract_init_date", NpgsqlDbType.Timestamp, dto.ContractInitDate != null ? dto.ContractInitDate : DBNull.Value);
+
+                await using NpgsqlDataReader reader = await cmd.ExecuteReaderAsync();
+                if (!await reader.ReadAsync()) return null;
+
+                var result = reader.GetInt32(reader.GetOrdinal("update_contract"));
+                return result;
+            }
+            catch(Exception ex)
+            {
+                _log.LogError(ex.Message);
+                throw new UpdateContractException(ex.Message);
+            }
+            finally
+            {
+                await conn.CloseAsync();
+            }
+        }
+
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Contracts/IContractRepository.cs
+++ b/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Contracts/IContractRepository.cs
@@ -0,0 +1,13 @@
+using ProximaContracts.Domain.Contracts.DTOs.Request;
+using ProximaContracts.Domain.Contracts.Entities;
+
+namespace ProximaContracts.Infrastructure.Rpositories.Contracts
+{
+    public interface IContractRepository
+    {
+        Task<ContractByIdEntity?> GetContractById(ContractByIdRequestDto dto);
+        Task<IEnumerable<GetContractsEntity>> GetContracts();
+        Task<int?> CreateContract(CreateContractRequestDto dto);
+        Task<int?> UpdateContract(UpdateContractRequestDto dto);
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Rates/IRateRepository.cs
+++ b/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Rates/IRateRepository.cs
@@ -0,0 +1,10 @@
+using ProximaContracts.Domain.Rates.Entities;
+
+namespace ProximaContracts.Infrastructure.Rpositories.Rates
+{
+    public interface IRateRepository
+    {
+        Task<bool> CheckIfExists(int Id);
+        Task<IEnumerable<RateEntity>> GetRates();
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Rates/RateFunctionStatements.cs
+++ b/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Rates/RateFunctionStatements.cs
@@ -0,0 +1,5 @@
+public static class RateFS
+{
+    public static string CheckIfExists = "SELECT public.check_rate_exists(@p_id);";
+    public static string GetRates = "SELECT * FROM public.get_rates();";
+}
--- a/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Rates/RateRepository.cs
+++ b/backend/ProximaContracts/ProximaContracts.Infrastructure/Rpositories/Rates/RateRepository.cs
@@ -0,0 +1,75 @@
+using AutoMapper;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+using Npgsql;
+using NpgsqlTypes;
+using ProximaContracts.Domain.Rates.Entities;
+using ProximaContracts.Shared.Exceptions.Repositories.Rates;
+
+namespace ProximaContracts.Infrastructure.Rpositories.Rates
+{
+    public class RateRepository(IConfiguration config, ILogger<RateRepository> logger, IMapper mapper) : IRateRepository
+    {
+        private readonly string _connStr = config.GetConnectionString("PostgreSQL")!;
+        private readonly ILogger<RateRepository> _log = logger;
+        private readonly IMapper _mapper = mapper; 
+
+
+
+        public async Task<bool> CheckIfExists(int Id)
+        {
+            await using var conn = new NpgsqlConnection(_connStr);
+            await conn.OpenAsync();
+            try
+            {
+                await using var cmd = new NpgsqlCommand(RateFS.CheckIfExists, conn);
+                cmd.Parameters.AddWithValue("p_id", NpgsqlDbType.Integer, Id);
+
+                var result = await cmd.ExecuteScalarAsync();
+                
+                return Convert.ToInt32(result) == 1;
+            }
+            catch (Exception ex)
+            {
+                _log.LogError(ex.Message);
+                throw new CheckIfRateIdExistsException(ex.Message);
+            }
+            finally 
+            { 
+                await conn.CloseAsync(); 
+            }
+        }
+
+
+        public async Task<IEnumerable<RateEntity>> GetRates()
+        {  
+            await using var conn = new NpgsqlConnection(_connStr);
+            await conn.OpenAsync();
+
+            try
+            {
+                await using var cmd = new NpgsqlCommand(RateFS.GetRates, conn);
+
+                await using NpgsqlDataReader reader = await cmd.ExecuteReaderAsync();
+                var results = new List<RateEntity>();
+
+                while (await reader.ReadAsync())
+                {
+                    results.Add(_mapper.Map<RateEntity>(reader));
+                }
+                await conn.CloseAsync();
+                return results;
+            }
+            catch (Exception ex)
+            {
+                _log.LogError(ex.Message);
+                throw new GetAllRatesException(ex.Message);
+            }
+            finally
+            {
+                await conn.CloseAsync();
+            }
+        }
+
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Contract/CreateContractException.cs
+++ b/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Contract/CreateContractException.cs
@@ -0,0 +1,7 @@
+namespace ProximaContracts.Shared.Exceptions.Repositories.Contract
+{
+    public sealed class CreateContractException : Exception
+    {
+        public CreateContractException(string message) : base(message) { }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Contract/CreateContractRateNotFoundException.cs
+++ b/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Contract/CreateContractRateNotFoundException.cs
@@ -0,0 +1,7 @@
+namespace ProximaContracts.Shared.Exceptions.Repositories.Contract
+{
+    public sealed class CreateContractRateNotFoundException : Exception
+    {
+        public CreateContractRateNotFoundException(string message) : base(message) { }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Contract/GetContractByIdException.cs
+++ b/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Contract/GetContractByIdException.cs
@@ -0,0 +1,7 @@
+namespace ProximaContracts.Shared.Exceptions.Repositories.Contract
+{
+    public  sealed class GetContractByIdException : Exception
+    {
+        public GetContractByIdException(string message) : base(message) { }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Contract/GetContractsException.cs
+++ b/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Contract/GetContractsException.cs
@@ -0,0 +1,8 @@
+namespace ProximaContracts.Shared.Exceptions.Repositories.Contract
+{
+    public sealed class GetContractsException : Exception
+    {
+        public GetContractsException(string message) : base(message) { }
+    }
+}
+
--- a/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Contract/UpdateContractException.cs
+++ b/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Contract/UpdateContractException.cs
@@ -0,0 +1,7 @@
+namespace ProximaContracts.Shared.Exceptions.Repositories.Contract
+{
+    public sealed class UpdateContractException : Exception
+    {
+        public UpdateContractException(string message) : base(message) { }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Rates/CheckIfRateIdExistsException.cs
+++ b/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Rates/CheckIfRateIdExistsException.cs
@@ -0,0 +1,7 @@
+namespace ProximaContracts.Shared.Exceptions.Repositories.Rates
+{
+    public sealed class CheckIfRateIdExistsException : Exception
+    {
+        public CheckIfRateIdExistsException(string message) : base(message) { }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Rates/GetAllRates404Exception.cs
+++ b/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Rates/GetAllRates404Exception.cs
@@ -0,0 +1,7 @@
+namespace ProximaContracts.Shared.Exceptions.Repositories.Rates
+{
+    public sealed class GetAllRates404Exception : Exception
+    {
+        public GetAllRates404Exception(string message) : base(message) { }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Rates/GetAllRatesException.cs
+++ b/backend/ProximaContracts/ProximaContracts.Shared/Exceptions/Repositories/Rates/GetAllRatesException.cs
@@ -0,0 +1,7 @@
+namespace ProximaContracts.Shared.Exceptions.Repositories.Rates
+{
+    public sealed class GetAllRatesException : Exception
+    {
+        public GetAllRatesException(string message) : base(message) { }
+    }
+}
--- a/backend/ProximaContracts/ProximaContracts.Shared/ProximaContracts.Shared.csproj
+++ b/backend/ProximaContracts/ProximaContracts.Shared/ProximaContracts.Shared.csproj
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
--- a/backend/ProximaContracts/ProximaContracts.sln
+++ b/backend/ProximaContracts/ProximaContracts.sln
@@ -0,0 +1,49 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36127.28 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ProximaContracts.API", "ProximaContracts.API\ProximaContracts.API.csproj", "{2FCFBFDD-95E3-4D27-8DB5-37B59321EF11}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ProximaContracts.Application", "ProximaContracts.Application\ProximaContracts.Application.csproj", "{0B573051-EAD0-48D4-ABDF-A4E0A6247EFF}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ProximaContracts.Domain", "ProximaContracts.Domain\ProximaContracts.Domain.csproj", "{67CA7F33-0D6F-46A0-A7C9-58929E153C2A}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ProximaContracts.Infrastructure", "ProximaContracts.Infrastructure\ProximaContracts.Infrastructure.csproj", "{4F8BB408-0111-4DCF-B9CD-EC1D9D7B3EE4}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ProximaContracts.Shared", "ProximaContracts.Shared\ProximaContracts.Shared.csproj", "{726F71DA-CADE-2203-4F7D-F88480F80337}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{2FCFBFDD-95E3-4D27-8DB5-37B59321EF11}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2FCFBFDD-95E3-4D27-8DB5-37B59321EF11}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2FCFBFDD-95E3-4D27-8DB5-37B59321EF11}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2FCFBFDD-95E3-4D27-8DB5-37B59321EF11}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0B573051-EAD0-48D4-ABDF-A4E0A6247EFF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0B573051-EAD0-48D4-ABDF-A4E0A6247EFF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0B573051-EAD0-48D4-ABDF-A4E0A6247EFF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0B573051-EAD0-48D4-ABDF-A4E0A6247EFF}.Release|Any CPU.Build.0 = Release|Any CPU
+		{67CA7F33-0D6F-46A0-A7C9-58929E153C2A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{67CA7F33-0D6F-46A0-A7C9-58929E153C2A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{67CA7F33-0D6F-46A0-A7C9-58929E153C2A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{67CA7F33-0D6F-46A0-A7C9-58929E153C2A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4F8BB408-0111-4DCF-B9CD-EC1D9D7B3EE4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4F8BB408-0111-4DCF-B9CD-EC1D9D7B3EE4}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4F8BB408-0111-4DCF-B9CD-EC1D9D7B3EE4}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4F8BB408-0111-4DCF-B9CD-EC1D9D7B3EE4}.Release|Any CPU.Build.0 = Release|Any CPU
+		{726F71DA-CADE-2203-4F7D-F88480F80337}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{726F71DA-CADE-2203-4F7D-F88480F80337}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{726F71DA-CADE-2203-4F7D-F88480F80337}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{726F71DA-CADE-2203-4F7D-F88480F80337}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {F9B629D6-70F9-456E-802E-0A7C534C00A8}
+	EndGlobalSection
+EndGlobal
--- a/db/01_CreateDataBaseAndTables.sql
+++ b/db/01_CreateDataBaseAndTables.sql
@@ -0,0 +1,60 @@
+DO
+$$
+BEGIN
+   IF NOT EXISTS (SELECT FROM pg_database WHERE datname = 'db.ProximaContracts') THEN
+      CREATE DATABASE "db.ProximaContracts";
+   END IF;
+END
+$$;
+
+\c "db.ProximaContracts";
+
+CREATE TABLE IF NOT EXISTS public.Rates (
+    Id        INTEGER GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    Name      VARCHAR(100) NOT NULL,
+    Price     MONEY        NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS public.Contracts (
+    Id                 INTEGER GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    ContractorIdNumber VARCHAR(20)  NOT NULL,
+    ContractorName     VARCHAR(50)  NOT NULL,
+    ContractorSurname  VARCHAR(100) NOT NULL,
+    ContractInitDate   TIMESTAMP    NOT NULL,
+    RateId             INTEGER      NOT NULL,
+    CONSTRAINT fk_contracts_rates
+        FOREIGN KEY (RateId)
+        REFERENCES public.Rates (Id)
+        ON UPDATE CASCADE
+        ON DELETE RESTRICT
+);
+
+
+
+CREATE INDEX IF NOT EXISTS idx_contracts_rateid
+    ON public.Contracts (RateId);
+
+
+INSERT INTO public.Rates 
+    (Name, Price)
+VALUES
+    ('Basic',    0.10),
+    ('Economy',  0.12),
+    ('Standard', 0.15),
+    ('Premium',  0.20),
+    ('Ultra',    0.25);
+
+
+
+INSERT INTO public.Contracts
+        (ContractorIdNumber,
+         ContractorName,
+         ContractorSurname,
+         ContractInitDate,
+         RateId)
+VALUES
+    ('A12345678', 'John',   'Smith',     '2025-01-15 10:00:00', 1), 
+    ('B23456789', 'Emily',  'Johnson',   '2025-02-20 11:30:00', 2), 
+    ('C34567890', 'Carlos', 'García',    '2025-03-05 09:00:00', 3), 
+    ('D45678901', 'Sofía',  'Martínez',  '2025-04-12 14:45:00', 4), 
+    ('E56789012', 'Liam',   'Brown',     '2025-05-01 08:20:00', 5); 
--- a/db/02_CreateContract.sql
+++ b/db/02_CreateContract.sql
@@ -0,0 +1,48 @@
+DROP FUNCTION IF EXISTS public.create_contract (
+    VARCHAR(20),  -- p_contractor_id_number
+    VARCHAR(50),  -- p_contractor_name
+    VARCHAR(100), -- p_contractor_surname
+    TIMESTAMP,    -- p_contract_init_date
+    INTEGER       -- p_rate_id
+);
+
+
+CREATE OR REPLACE FUNCTION public.create_contract (
+    p_contractor_id_number VARCHAR(20),
+    p_contractor_name      VARCHAR(50),
+    p_contractor_surname   VARCHAR(100),
+    p_contract_init_date   TIMESTAMP,
+    p_rate_id              INTEGER
+)
+RETURNS INTEGER
+AS $$
+DECLARE
+    v_new_id INTEGER;
+BEGIN
+    PERFORM 1
+    FROM   public.rates
+    WHERE  id = p_rate_id;
+    IF NOT FOUND THEN
+        RAISE EXCEPTION
+            'No reate found with id %', p_rate_id;
+    END IF;
+
+    INSERT INTO public.contracts (
+        contractoridnumber,
+        contractorname,
+        contractorsurname,
+        contractinitdate,
+        rateid
+    )
+    VALUES (
+        p_contractor_id_number,
+        p_contractor_name,
+        p_contractor_surname,
+        p_contract_init_date,
+        p_rate_id
+    )
+    RETURNING id INTO v_new_id;
+
+    RETURN v_new_id;
+END;
+$$ LANGUAGE plpgsql VOLATILE;
--- a/db/03_GetAllContracts.sql
+++ b/db/03_GetAllContracts.sql
@@ -0,0 +1,23 @@
+
+DROP FUNCTION IF EXISTS public.get_contracts();
+
+CREATE OR REPLACE FUNCTION public.get_contracts()
+RETURNS TABLE (
+    Id               INTEGER,
+    ContractorName   VARCHAR,
+    ContractorSurname VARCHAR,
+    ContractInitDate TIMESTAMP,
+    RateName         VARCHAR
+)
+AS $$
+    SELECT
+        c.id,
+        c.contractorname,
+        c.contractorsurname,
+        c.contractinitdate,
+        r.name   AS RateName
+    FROM public.contracts  AS c
+    JOIN public.rates      AS r
+      ON r.id = c.rateid
+    ORDER BY c.id;
+$$ LANGUAGE SQL STABLE;
--- a/db/04_GetContractById.sql
+++ b/db/04_GetContractById.sql
@@ -0,0 +1,25 @@
+DROP FUNCTION IF EXISTS public.get_contract_by_id(integer);
+
+CREATE OR REPLACE FUNCTION public.get_contract_by_id(p_contract_id INTEGER)
+RETURNS TABLE (
+    Id                 INTEGER,
+    ContractorIdNumber VARCHAR(20),
+    ContractorName     VARCHAR(50),
+    ContractorSurname  VARCHAR(100),
+    ContractInitDate   TIMESTAMP,
+    RateId             INTEGER,
+    RateName           VARCHAR(100),
+    RatePrice          MONEY
+) AS $$
+    SELECT c.Id,
+           c.ContractorIdNumber,
+           c.ContractorName,
+           c.ContractorSurname,
+           c.ContractInitDate,
+           c.RateId,
+           r.Name  AS RateName,
+           r.Price AS RatePrice
+    FROM   public.Contracts c
+    JOIN   public.Rates r ON r.Id = c.RateId
+    WHERE  c.Id = p_contract_id;
+$$ LANGUAGE SQL STABLE;
--- a/db/05_UpdateContract.sql
+++ b/db/05_UpdateContract.sql
@@ -0,0 +1,48 @@
+DROP FUNCTION IF EXISTS public.update_contract (
+    INTEGER,
+    INTEGER,
+    VARCHAR(20),
+    VARCHAR(50),
+    VARCHAR(100),
+    TIMESTAMP
+);
+
+CREATE OR REPLACE FUNCTION public.update_contract (
+    p_contract_id           INTEGER,                
+    p_rate_id               INTEGER,                
+    p_contractor_id_number  VARCHAR(20)  DEFAULT NULL,
+    p_contractor_name       VARCHAR(50)  DEFAULT NULL,
+    p_contractor_surname    VARCHAR(100) DEFAULT NULL,
+    p_contract_init_date    TIMESTAMP     DEFAULT NULL
+)
+RETURNS INTEGER
+AS $$
+BEGIN
+    PERFORM 1
+    FROM   public.contracts
+    WHERE  id = p_contract_id;
+    IF NOT FOUND THEN
+        RAISE EXCEPTION
+            'No existe ningún contrato con id %', p_contract_id;
+    END IF;
+
+    PERFORM 1
+    FROM   public.rates
+    WHERE  id = p_rate_id;
+    IF NOT FOUND THEN
+        RAISE EXCEPTION
+            'No existe ninguna tarifa con id %', p_rate_id;
+    END IF;
+
+    UPDATE public.contracts
+    SET
+        contractoridnumber = COALESCE(p_contractor_id_number, contractoridnumber),
+        contractorname     = COALESCE(p_contractor_name,      contractorname),
+        contractorsurname  = COALESCE(p_contractor_surname,   contractorsurname),
+        contractinitdate   = COALESCE(p_contract_init_date,   contractinitdate),
+        rateid             = p_rate_id
+    WHERE id = p_contract_id;
+
+    RETURN p_contract_id;
+END;
+$$ LANGUAGE plpgsql VOLATILE;
--- a/db/06_CheckRateExists.sql
+++ b/db/06_CheckRateExists.sql
@@ -0,0 +1,15 @@
+DROP FUNCTION IF EXISTS public.check_rate_exists(INTEGER);
+
+CREATE OR REPLACE FUNCTION public.check_rate_exists(p_id INTEGER)
+RETURNS INTEGER
+AS $$
+    SELECT CASE
+             WHEN EXISTS (
+                    SELECT 1
+                      FROM public.rates
+                     WHERE id = p_id
+                 )
+             THEN 1
+             ELSE 0
+           END;
+$$ LANGUAGE SQL STABLE;
--- a/db/07_GetAllRates.sql
+++ b/db/07_GetAllRates.sql
@@ -0,0 +1,19 @@
+
+DROP FUNCTION IF EXISTS public.get_rates();
+
+CREATE OR REPLACE FUNCTION public.get_rates()
+RETURNS TABLE (
+    Id        INTEGER,
+    Name      VARCHAR,
+    Price     MONEY
+)
+AS $$
+    SELECT
+        c.id,
+        c.name,
+        c.price        
+    FROM public.rates  AS c
+    ORDER BY c.id;
+$$ LANGUAGE SQL STABLE;
+
+
--- a/deploy.sh
+++ b/deploy.sh
@@ -0,0 +1,21 @@
+
+set -euo pipefail
+IFS=$'\n\t'
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cd "$SCRIPT_DIR"
+
+echo "Deteniendo contenedores"
+docker compose down -v || true
+
+echo "Descargando últimos cambios del repo"
+git pull --ff-only
+
+echo "Construyendo imágenes sin usar caché"
+export COMPOSE_BAKE=true
+docker compose build --no-cache
+
+echo "Levantando stack en segundo plano"
+docker compose up -d
+
+echo "Despliegue completado con éxito"
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -0,0 +1,39 @@
+services:
+  db:
+    image: postgres:16
+    environment:
+      POSTGRES_USER: proxima_user
+      POSTGRES_PASSWORD: Proxima_Password
+      POSTGRES_DB: db.ProximaContracts
+    volumes:
+      - ./db:/docker-entrypoint-initdb.d
+    networks:
+      - internal
+
+  backend:
+    build:
+      context: .
+      dockerfile: docker/backend.Dockerfile
+    depends_on:
+      - db
+    environment:
+      ConnectionStrings__PostgreSQL: >
+        Host=db;Port=5432;Database=db.ProximaContracts;
+        Username=proxima_user;Password=Proxima_Password
+    networks:
+      - internal
+
+  front:
+    build:
+      context: .
+      dockerfile: docker/frontend.Dockerfile
+    depends_on:
+      - backend
+    ports:
+      - "5173:80"
+    networks:
+      - internal
+
+networks:
+  internal:
+    driver: bridge
--- a/docker/Caddyfile
+++ b/docker/Caddyfile
@@ -0,0 +1,12 @@
+:80
+
+root * /usr/share/caddy
+file_server
+
+handle /api/* {
+	reverse_proxy backend:8080
+}
+
+handle {
+	try_files {path} /index.html
+}
--- a/docker/backend.Dockerfile
+++ b/docker/backend.Dockerfile
@@ -0,0 +1,13 @@
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+WORKDIR /src
+COPY backend/ProximaContracts/ ./
+RUN dotnet restore
+WORKDIR /src/ProximaContracts.API
+RUN dotnet publish -c Release -o /app/publish
+
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS final
+ENV ASPNETCORE_URLS=http://+:8080
+WORKDIR /app
+COPY --from=build /app/publish .
+EXPOSE 8080
+ENTRYPOINT ["dotnet","ProximaContracts.API.dll"]
--- a/docker/frontend.Dockerfile
+++ b/docker/frontend.Dockerfile
@@ -0,0 +1,13 @@
+# ---------- build ----------
+FROM node:20-alpine AS build
+WORKDIR /app
+COPY front/contracts-frontend/package*.json ./
+RUN npm ci
+COPY front/contracts-frontend .
+RUN npm run build
+
+# ---------- runtime ----------
+FROM caddy:2-alpine
+COPY --from=build /app/dist /usr/share/caddy
+COPY docker/Caddyfile /etc/caddy/Caddyfile
+EXPOSE 80
--- a/front/contracts-frontend/.env
+++ b/front/contracts-frontend/.env
@@ -0,0 +1 @@
+VITE_API_BASE_URL=http://localhost:5009/api
--- a/front/contracts-frontend/.env.production
+++ b/front/contracts-frontend/.env.production
@@ -0,0 +1 @@
+VITE_API_BASE_URL=https://quediaempiezo.asarmientotest.es/api
--- a/front/contracts-frontend/.gitignore
+++ b/front/contracts-frontend/.gitignore
@@ -0,0 +1,24 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
--- a/front/contracts-frontend/README.md
+++ b/front/contracts-frontend/README.md
@@ -0,0 +1,54 @@
+# React + TypeScript + Vite
+
+This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+
+Currently, two official plugins are available:
+
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) for Fast Refresh
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+
+## Expanding the ESLint configuration
+
+If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
+
+```js
+export default tseslint.config({
+  extends: [
+    // Remove ...tseslint.configs.recommended and replace with this
+    ...tseslint.configs.recommendedTypeChecked,
+    // Alternatively, use this for stricter rules
+    ...tseslint.configs.strictTypeChecked,
+    // Optionally, add this for stylistic rules
+    ...tseslint.configs.stylisticTypeChecked,
+  ],
+  languageOptions: {
+    // other options...
+    parserOptions: {
+      project: ['./tsconfig.node.json', './tsconfig.app.json'],
+      tsconfigRootDir: import.meta.dirname,
+    },
+  },
+})
+```
+
+You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
+
+```js
+// eslint.config.js
+import reactX from 'eslint-plugin-react-x'
+import reactDom from 'eslint-plugin-react-dom'
+
+export default tseslint.config({
+  plugins: {
+    // Add the react-x and react-dom plugins
+    'react-x': reactX,
+    'react-dom': reactDom,
+  },
+  rules: {
+    // other rules...
+    // Enable its recommended typescript rules
+    ...reactX.configs['recommended-typescript'].rules,
+    ...reactDom.configs.recommended.rules,
+  },
+})
+```
--- a/front/contracts-frontend/eslint.config.js
+++ b/front/contracts-frontend/eslint.config.js
@@ -0,0 +1,28 @@
+import js from '@eslint/js'
+import globals from 'globals'
+import reactHooks from 'eslint-plugin-react-hooks'
+import reactRefresh from 'eslint-plugin-react-refresh'
+import tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  { ignores: ['dist'] },
+  {
+    extends: [js.configs.recommended, ...tseslint.configs.recommended],
+    files: ['**/*.{ts,tsx}'],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+    },
+    plugins: {
+      'react-hooks': reactHooks,
+      'react-refresh': reactRefresh,
+    },
+    rules: {
+      ...reactHooks.configs.recommended.rules,
+      'react-refresh/only-export-components': [
+        'warn',
+        { allowConstantExport: true },
+      ],
+    },
+  },
+)
--- a/front/contracts-frontend/index.html
+++ b/front/contracts-frontend/index.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/proximaenergia.com.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Prueba técnica proxima contracts</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>
--- a/front/contracts-frontend/package-lock.json
+++ b/front/contracts-frontend/package-lock.json
--- a/front/contracts-frontend/package.json
+++ b/front/contracts-frontend/package.json
@@ -0,0 +1,33 @@
+{
+  "name": "contracts-frontend",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "lint": "eslint .",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "bootstrap": "^5.3.6",
+    "react": "^19.1.0",
+    "react-dom": "^19.1.0",
+    "react-hook-form": "^7.57.0",
+    "react-router-dom": "^7.6.2"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.25.0",
+    "@types/node": "^24.0.1",
+    "@types/react": "^19.1.2",
+    "@types/react-dom": "^19.1.2",
+    "@vitejs/plugin-react": "^4.4.1",
+    "eslint": "^9.25.0",
+    "eslint-plugin-react-hooks": "^5.2.0",
+    "eslint-plugin-react-refresh": "^0.4.19",
+    "globals": "^16.0.0",
+    "typescript": "~5.8.3",
+    "typescript-eslint": "^8.30.1",
+    "vite": "^6.3.5"
+  }
+}
--- a/front/contracts-frontend/public/proximaenergia.com.ico
+++ b/front/contracts-frontend/public/proximaenergia.com.ico
--- a/front/contracts-frontend/src/components/forms/FormField.tsx
+++ b/front/contracts-frontend/src/components/forms/FormField.tsx
@@ -0,0 +1,59 @@
+import type {
+  FieldError,
+  FieldValues,
+  Path,
+  RegisterOptions,
+  UseFormRegister,
+} from 'react-hook-form';
+
+type FormFieldProps<T extends FieldValues> = {
+  label: string;
+  name: Path<T>;
+  register: UseFormRegister<T>;
+  error?: FieldError;
+  rules?: RegisterOptions<T>;
+  type?: string;
+  className?: string;
+};
+
+export default function FormField<T extends FieldValues>({
+  label,
+  name,
+  register,
+  error,
+  rules,
+  type = 'text',
+  className = '',
+}: FormFieldProps<T>) {
+  const buildValidationRules = (): RegisterOptions<T, Path<T>> => {
+    const base: RegisterOptions<T, Path<T>> = { required: 'Obligatorio' };
+
+    if (type === 'number') {
+      (base as any).valueAsNumber = true;
+    }
+    if (rules) Object.assign(base, rules);
+
+    return base;
+  };
+
+  const validationRules = buildValidationRules();
+  
+  return (
+    <div className={`col-12 col-md-6 col-lg-4 ${className}`}>
+      <label htmlFor={name} className="form-label">
+        {label}
+      </label>
+
+      <input
+        id={name}
+        type={type}
+        className={`form-control ${error ? 'is-invalid' : ''}`}
+        {...register(name, validationRules)}
+      />
+
+      {error && (
+        <small className="text-danger">{error.message ?? 'Obligatorio'}</small>
+      )}
+    </div>
+  );
+}
--- a/front/contracts-frontend/src/env.d.ts
+++ b/front/contracts-frontend/src/env.d.ts
@@ -0,0 +1,7 @@
+interface ImportMetaEnv {
+  readonly VITE_API_BASE_URL?: string;
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv;
+}
--- a/front/contracts-frontend/src/features/contracts/api/ContractsApi.ts
+++ b/front/contracts-frontend/src/features/contracts/api/ContractsApi.ts
@@ -0,0 +1,26 @@
+
+import { get, post, put } from '../../../utils/http/Http';
+
+import type { ContractSummary } from '../types/ContractSummary';
+import type { ContractDetail } from '../types/ContractDetail';
+import type { UpdateContractDto } from '../types/UpdateContractDto';
+import type { CreateContractDto } from '../types/CreateContractDto';
+
+
+export const getAllContracts = () =>
+  get<ContractSummary[]>('/Contracts/GetAll');
+
+
+export const getContractById = (id: number) =>
+  get<ContractDetail>('/Contracts/GetById', { params: { id } });
+
+
+export const updateContract = (dto: UpdateContractDto) =>
+  put<void, UpdateContractDto>('/Contracts/UpdateContract', dto);
+
+
+export const createContract = (dto: CreateContractDto) =>
+  post<{ newContractId: number }, CreateContractDto>(
+    '/Contracts/CreateContract',
+    dto
+  );
--- a/front/contracts-frontend/src/features/contracts/components/ContractCreateForm.tsx
+++ b/front/contracts-frontend/src/features/contracts/components/ContractCreateForm.tsx
@@ -0,0 +1,100 @@
+import { useForm } from 'react-hook-form';
+import { useNavigate } from 'react-router-dom';
+
+import type { CreateContractDto } from '@/features/contracts/types/CreateContractDto';
+import FormField from '@/components/forms/FormField';
+import { useRates } from '@/features/rates/hooks/useRates';
+import { useCreateContract } from '@/features/contracts/hooks/useCreateContracts';
+import { validateNifNie } from '@/utils/validations/ValidateNifNie';
+import { maxLengthNonEmpty } from '@/utils/validations/MaxLengthNonEmpty';
+
+
+export default function ContractCreateForm() {
+  const {
+    register,
+    handleSubmit,
+    formState: { errors },
+  } = useForm<CreateContractDto>();
+  const navigate = useNavigate();
+
+  const { rates, loading: loadingRates, error: rateError } = useRates();
+
+  const { create, loading: creating, error: submitError } = useCreateContract();
+
+  return (
+    <form onSubmit={handleSubmit(create)} className="row g-3">
+
+      <FormField<CreateContractDto>
+        label="Nombre"
+        name="contractorName"
+        register={register}
+        error={errors.contractorName}
+        rules={{validate: maxLengthNonEmpty(50)}}
+      />
+      
+      <FormField<CreateContractDto>
+        label="Apellidos"
+        name="contractorSurname"
+        register={register}
+        error={errors.contractorSurname}
+        rules={{validate: maxLengthNonEmpty(100)}}
+      />
+
+      <FormField<CreateContractDto>
+        label="DNI / NIE"
+        name="contractorIdNumber"
+        register={register}
+        error={errors.contractorIdNumber}
+        rules={{ 
+          validate: {
+            nifNie : validateNifNie,
+            maxLengthNonEmpty: maxLengthNonEmpty(9)
+          }
+         }}
+      />
+
+      <div className="col-12 col-md-6 col-lg-4">
+        <label htmlFor="rateId" className="form-label">
+          Tarifa
+        </label>
+        <select
+          id="rateId"
+          className="form-select"
+          {...register('rateId', { required: true, valueAsNumber: true })}
+          disabled={loadingRates || !!rateError}
+        >
+          <option value="">
+            {loadingRates ? 'Cargando…' : '— Selecciona —'}
+          </option>
+          {rates.map((rate) => (
+            <option key={rate.id} value={rate.id}>
+              {rate.name} ({rate.price.toFixed(2)} €/kWh)
+            </option>
+          ))}
+        </select>
+        {errors.rateId && <small className="text-danger">Obligatorio</small>}
+        {rateError && <small className="text-danger">{rateError}</small>}
+      </div>
+
+      {submitError && (
+        <div className="col-12">
+          <small className="text-danger">{submitError}</small>
+        </div>
+      )}
+
+      <div className="col-12 mt-2">
+        <button type="submit" className="btn btn-primary me-2" disabled={creating}>
+          {creating ? 'Guardando…' : 'Guardar'}
+        </button>
+        <button
+          type="button"
+          className="btn btn-outline-secondary"
+          onClick={() => navigate(-1)}
+          disabled={creating}
+        >
+          Cancelar
+        </button>
+      </div>
+    </form>
+  );
+}
--- a/front/contracts-frontend/src/features/contracts/components/ContractDetailComponent.tsx
+++ b/front/contracts-frontend/src/features/contracts/components/ContractDetailComponent.tsx
@@ -0,0 +1,28 @@
+import type { ContractDetail } from '@/features/contracts/types/ContractDetail';
+
+
+export default function ContractDetailComponent({
+  contract,
+  onEdit,
+}: {
+  contract: ContractDetail;
+  onEdit: () => void;
+}) {
+  return (
+    <div className="card shadow-sm">
+      <div className="card-body">
+        <h4 className="card-title mb-3">Contrato #{contract.id}</h4>
+        <p><strong>Nif/Nie:</strong> {contract.contractorIdNumber}</p>
+        <p><strong>Nombre:</strong> {contract.contractorName}</p>
+        <p><strong>Apellidos:</strong> {contract.contractorSurname}</p>
+        <p><strong>Inicio:</strong> {new Date(contract.contractInitDate).toLocaleDateString()}</p>
+        <p><strong>Tarifa:</strong> {contract.rateId}, {contract.rateName} </p>
+
+
+        <button onClick={onEdit} className="btn btn-primary mt-3">
+          Editar
+        </button>
+      </div>
+    </div>
+  );
+}
--- a/front/contracts-frontend/src/features/contracts/components/ContractUpdateComponent.tsx
+++ b/front/contracts-frontend/src/features/contracts/components/ContractUpdateComponent.tsx
@@ -0,0 +1,133 @@
+import { useEffect } from 'react';
+import { useForm } from 'react-hook-form';
+import type { ContractDetail } from '@/features/contracts/types/ContractDetail';
+import type { UpdateContractDto } from '@/features/contracts/types/UpdateContractDto';
+import { updateContract } from '@/features/contracts/api/ContractsApi';
+import { getProblemMessage } from '@/utils/http/ErrorHelper';
+
+import FormField from '@/components/forms/FormField';
+import { maxLengthNonEmpty } from '@/utils/validations/MaxLengthNonEmpty';
+import { maxDate, minDate } from '@/utils/validations/dateValidators';
+
+interface Props {
+  contract: ContractDetail;
+  onSaved: (updated: ContractDetail) => void;
+  onCancel: () => void;
+}
+
+interface FormData {
+  contractorName: string;
+  contractorSurname: string;
+  contractInitDate: string;
+  rateId: number;
+}
+
+export default function ContractUpdateComponent({
+  contract,
+  onSaved,
+  onCancel,
+}: Props) {
+  const {
+    register,
+    handleSubmit,
+    formState: { errors, isSubmitting },
+    reset,
+  } = useForm<FormData>();
+
+
+  useEffect(() => {
+    reset({
+      contractorName: contract.contractorName,
+      contractorSurname: contract.contractorSurname,
+      contractInitDate: contract.contractInitDate.slice(0, 10),
+      rateId: contract.rateId,
+    });
+  }, [contract, reset]);
+
+
+  const onSubmit = async (data: FormData) => {
+    const dto: UpdateContractDto = { contractId: contract.id, ...data };
+    try {
+      await updateContract(dto);
+      onSaved({ ...contract, ...data });
+    } catch (err) {
+      alert(getProblemMessage(err, 'Error al actualizar.'));
+    }
+  };
+
+  const todayIso = new Date().toISOString().slice(0, 10);
+
+  return (
+    <form onSubmit={handleSubmit(onSubmit)} className="card shadow-sm p-4">
+      <h4 className="mb-4">Editar contrato #{contract.id}</h4>
+
+      <div className="row gy-3">
+        <FormField<FormData>
+          label="Nombre"
+          name="contractorName"
+          register={register}
+          error={errors.contractorName}
+          rules={{
+            validate: maxLengthNonEmpty(50),
+          }}
+          className="col-12"
+        />
+
+        <FormField<FormData>
+          label="Apellidos"
+          name="contractorSurname"
+          register={register}
+          error={errors.contractorSurname}
+          rules={{
+            validate: maxLengthNonEmpty(100),
+          }}
+          className="col-12"
+        />
+
+        <FormField<FormData>
+          label="Inicio"
+          name="contractInitDate"
+          type="date"
+          register={register}
+          error={errors.contractInitDate}
+          rules={{ 
+            required: 'Obligatorio',
+            validate: {
+              minDate: minDate("01/01/1999"),
+              maxDate: maxDate(todayIso)
+            }
+           }}
+          className="col-12 col-md-6"
+        />
+
+        <FormField<FormData>
+          label="Rate ID"
+          name="rateId"
+          type="number"
+          register={register}
+          error={errors.rateId}
+          rules={{
+            required: 'Obligatorio',
+            valueAsNumber: true,
+            min: { value: 1, message: 'Debe ser ≥ 1' },
+          }}
+          className="col-12 col-md-6"
+        />
+      </div>
+
+      <div className="d-flex gap-2 mt-4">
+        <button
+          type="submit"
+          disabled={isSubmitting}
+          className="btn btn-success"
+        >
+          {isSubmitting ? 'Guardando…' : 'Guardar'}
+        </button>
+
+        <button type="button" onClick={onCancel} className="btn btn-secondary">
+          Cancelar
+        </button>
+      </div>
+    </form>
+  );
+}
--- a/front/contracts-frontend/src/features/contracts/components/ContractsTableComponent.tsx
+++ b/front/contracts-frontend/src/features/contracts/components/ContractsTableComponent.tsx
@@ -0,0 +1,42 @@
+
+import { Link } from 'react-router-dom';
+import { useContractsAll } from '../hooks/useContractsAll';
+
+export default function ContractsTableComponent() {
+  const { contracts, loading, error } = useContractsAll();
+
+  if (loading) return <p>Cargando…</p>;
+  if (error)   return <p className="text-danger">{error}</p>;
+
+  return (
+    <table className="table table-hover table-contracts">
+      <thead>
+        <tr>
+          <th>ID</th>
+          <th>Nombre</th>
+          <th>Apellidos</th>
+          <th>Inicio</th>
+          <th>Tarifa</th>
+          <th className="text-center">Acciones</th>
+        </tr>
+      </thead>
+
+      <tbody>
+        {contracts.map(c => (
+          <tr key={c.id}>
+            <td>{c.id}</td>
+            <td>{c.contractorName}</td>
+            <td>{c.contractorSurname}</td>
+            <td>{new Date(c.contractInitDate).toLocaleDateString()}</td>
+            <td>{c.rateName}</td>
+            <td className="text-center">
+              <Link to={`/contracts/${c.id}`} className="btn btn-sm btn-primary">
+                Detalle
+              </Link>
+            </td>
+          </tr>
+        ))}
+      </tbody>
+    </table>
+  );
+}
--- a/front/contracts-frontend/src/features/contracts/hooks/useContractDetail.ts
+++ b/front/contracts-frontend/src/features/contracts/hooks/useContractDetail.ts
@@ -0,0 +1,28 @@
+import { useState, useEffect, useCallback } from 'react';
+import { getContractById } from '../api/ContractsApi';
+import type { ContractDetail } from '../types/ContractDetail';
+
+export function useContractDetail(contractId: number) {
+  const [contract, setContract] = useState<ContractDetail | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+
+  const fetchContract = useCallback(async () => {
+    setLoading(true);
+    try {
+      const data = await getContractById(contractId);
+      setContract(data);
+      setError(null);
+    } catch {
+      setError('Contrato no encontrado');
+    } finally {
+      setLoading(false);
+    }
+  }, [contractId]);
+
+  useEffect(() => {
+    fetchContract();
+  }, [fetchContract]);
+
+  return { contract, loading, error, refresh: fetchContract };
+}
--- a/front/contracts-frontend/src/features/contracts/hooks/useContractsAll.ts
+++ b/front/contracts-frontend/src/features/contracts/hooks/useContractsAll.ts
@@ -0,0 +1,29 @@
+import { useEffect, useState } from 'react';
+import { getAllContracts } from '@/features/contracts/api/ContractsApi';
+import type { ContractSummary } from '@/features/contracts/types/ContractSummary';
+import { getProblemMessage } from '@/utils/http/ErrorHelper';
+import { HttpError } from '@/utils/http/HttpError';
+
+export function useContractsAll() {
+  const [contracts, setContractsAll] = useState<ContractSummary[]>([]);
+  const [loading, setLoading]     = useState(true);
+  const [error, setError]         = useState<string | null>(null);
+
+  useEffect(() => {
+    (async () => {
+      try {
+        setContractsAll(await getAllContracts());
+      } catch (err) {
+        setError(
+          err instanceof HttpError && err.status === 404
+            ? 'No se encontraron contratos.'
+            : getProblemMessage(err, 'Error al cargar los contratos.')
+        );
+      } finally {
+        setLoading(false);
+      }
+    })();
+  }, []);
+
+  return { contracts, loading, error };
+}
--- a/front/contracts-frontend/src/features/contracts/hooks/useCreateContracts.ts
+++ b/front/contracts-frontend/src/features/contracts/hooks/useCreateContracts.ts
@@ -0,0 +1,26 @@
+import { useState } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { createContract as apiCreate } from '../api/ContractsApi';
+import type { CreateContractDto } from '../types/CreateContractDto';
+import { getProblemMessage } from '@/utils/http/ErrorHelper';
+
+export function useCreateContract() {
+  const navigate = useNavigate();
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const create = async (dto: CreateContractDto) => {
+    setLoading(true);
+    setError(null);
+    try {
+      const { newContractId } = await apiCreate(dto);
+      navigate(`/contracts/${newContractId}`);
+    } catch (err) {
+      setError(getProblemMessage(err, 'No se pudo crear el contrato'));
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return { create, loading, error };
+}
--- a/front/contracts-frontend/src/features/contracts/pages/ContractCreate.tsx
+++ b/front/contracts-frontend/src/features/contracts/pages/ContractCreate.tsx
@@ -0,0 +1,31 @@
+import ContractCreateForm from '@/features/contracts/components/ContractCreateForm';
+import { useNavigate } from 'react-router-dom';
+
+
+export default function ContractCreate() {
+  const navigate = useNavigate();
+
+  return (
+    <div className="container-fluid py-4 px-4 px-lg-5">
+      <div className="card shadow-sm">
+        <div className="card-body">
+
+          {/* Cabecera */}
+          <div className="d-flex align-items-center mb-4">
+            <button
+              type="button"
+              onClick={() => navigate(-1)}
+              className="btn btn-outline-primary btn-sm me-3"
+            >
+              &larr; Atrás
+            </button>
+            <h2 className="h4 m-0">Crear nuevo contrato</h2>
+          </div>
+
+          {/* Formulario */}
+          <ContractCreateForm />
+        </div>
+      </div>
+    </div>
+  );
+}
--- a/front/contracts-frontend/src/features/contracts/pages/ContractDetail.tsx
+++ b/front/contracts-frontend/src/features/contracts/pages/ContractDetail.tsx
@@ -0,0 +1,63 @@
+// src/features/contracts/components/ContractDetail.tsx
+import { useState } from 'react';
+import { useParams, useNavigate } from 'react-router-dom';
+
+import { useContractDetail } from '@/features/contracts/hooks/useContractDetail';
+import ContractDetailComponent from '@/features/contracts/components/ContractDetailComponent';
+import ContractUpdateComponent from '@/features/contracts/components/ContractUpdateComponent';
+
+export default function ContractDetail() {
+  const { id } = useParams<{ id: string }>();
+  const numericId = Number(id);
+  const navigate = useNavigate();
+
+  const { contract, loading, error, refresh } = useContractDetail(numericId);
+  const [editing, setEditing] = useState(false);
+
+  if (loading) return <p>Cargando…</p>;
+  if (error || !contract) return <p className="text-red-600">{error}</p>;
+
+  return (
+    <div className="mx-auto max-w-xl space-y-6 p-4">
+      {editing ? (
+        <div className="container my-4">
+          <div className="card shadow-sm">
+            <div className="card-body">
+              <div className="d-flex align-items-center my-4">
+                <h2 className="h4 m-0">Modificar contrato</h2>
+              </div>
+              <ContractUpdateComponent
+                contract={contract}
+                onSaved={async () => {
+                  setEditing(false);
+                  await refresh();
+                }}
+                onCancel={() => setEditing(false)}
+              />
+            </div>
+          </div>
+        </div>
+      ) : (
+        <div className="container my-4">
+          <div className="card shadow-sm">
+            <div className="card-body">
+              <div className="d-flex align-items-center my-4">
+                <button
+                  onClick={() => navigate(`/`)}
+                  className="btn btn-outline-primary btn-sm me-3"
+                >
+                  &larr; Atrás
+                </button>
+                <h2 className="h4 m-0">Detalle de contrato</h2>
+              </div>
+              <ContractDetailComponent
+                contract={contract}
+                onEdit={() => setEditing(true)}
+              />
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
--- a/front/contracts-frontend/src/features/contracts/pages/ContractsList.tsx
+++ b/front/contracts-frontend/src/features/contracts/pages/ContractsList.tsx
@@ -0,0 +1,20 @@
+import ContractsTableComponent from '@/features/contracts/components/ContractsTableComponent';
+import { Link } from 'react-router-dom';
+
+
+export default function ContractsList() {
+  return (
+    <div className="container my-4">
+      <div className="card shadow-sm">
+        <div className="card-body">
+          <h2 className="h4 my-4">Listado de contratos</h2>
+          <Link to="/contracts/new" className="btn btn-primary mb-3">
+            + Nuevo contrato
+          </Link>
+          <ContractsTableComponent />
+          
+        </div>
+      </div>
+    </div>
+  );
+}
--- a/front/contracts-frontend/src/features/contracts/types/ContractDetail.ts
+++ b/front/contracts-frontend/src/features/contracts/types/ContractDetail.ts
@@ -0,0 +1,7 @@
+import type { ContractSummary } from "./ContractSummary";
+
+export interface ContractDetail extends ContractSummary {
+  contractorIdNumber: string;
+  rateId: number;
+  ratePrice: number;
+}
--- a/front/contracts-frontend/src/features/contracts/types/ContractSummary.ts
+++ b/front/contracts-frontend/src/features/contracts/types/ContractSummary.ts
@@ -0,0 +1,7 @@
+export interface ContractSummary {
+  id: number;
+  contractorName: string;
+  contractorSurname: string;
+  contractInitDate: string;
+  rateName: string;
+}
--- a/front/contracts-frontend/src/features/contracts/types/CreateContractDto.ts
+++ b/front/contracts-frontend/src/features/contracts/types/CreateContractDto.ts
@@ -0,0 +1,6 @@
+export interface CreateContractDto {
+  contractorIdNumber: string;
+  contractorName: string;
+  contractorSurname: string;
+  rateId: number;
+}
--- a/front/contracts-frontend/src/features/contracts/types/UpdateContractDto.ts
+++ b/front/contracts-frontend/src/features/contracts/types/UpdateContractDto.ts
@@ -0,0 +1,8 @@
+export interface UpdateContractDto {
+  contractId: number;
+  rateId: number;
+  contractorIdNumber?: string;
+  contractorName?: string;
+  contractorSurname?: string;
+  contractInitDate?: string;
+}
--- a/front/contracts-frontend/src/features/rates/api/RatesApi.ts
+++ b/front/contracts-frontend/src/features/rates/api/RatesApi.ts
@@ -0,0 +1,4 @@
+import {get} from '@/utils/http/Http'
+import type { RateDetails } from '../types/RateDetails'
+
+export const getAllRates = () => get<RateDetails[]>('/Rates/GetAllRates');
--- a/front/contracts-frontend/src/features/rates/hooks/useRates.ts
+++ b/front/contracts-frontend/src/features/rates/hooks/useRates.ts
@@ -0,0 +1,24 @@
+import { useEffect, useState } from 'react';
+import { getAllRates } from '../api/RatesApi';
+import type { RateDetails } from '../types/RateDetails';
+import { getProblemMessage } from '@/utils/http/ErrorHelper';
+
+export function useRates() {
+  const [rates, setRates] = useState<RateDetails[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    (async () => {
+      try {
+        setRates(await getAllRates());
+      } catch (err) {
+        setError(getProblemMessage(err, 'No se pudieron cargar las tarifas'));
+      } finally {
+        setLoading(false);
+      }
+    })();
+  }, []);
+
+  return { rates, loading, error };
+}
--- a/front/contracts-frontend/src/features/rates/types/RateDetails.ts
+++ b/front/contracts-frontend/src/features/rates/types/RateDetails.ts
@@ -0,0 +1,5 @@
+export interface RateDetails {
+  id: number;
+  name: string;
+  price: number;
+}
--- a/front/contracts-frontend/src/main.tsx
+++ b/front/contracts-frontend/src/main.tsx
@@ -0,0 +1,14 @@
+import 'bootstrap/dist/css/bootstrap.min.css';
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import '@/styles/brand-proxima.css';
+import { BrowserRouter } from 'react-router-dom'
+import AppRoutes from './routes/Index.tsx'
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <BrowserRouter>
+      <AppRoutes />
+    </BrowserRouter>
+  </StrictMode>,
+)
--- a/front/contracts-frontend/src/routes/Index.tsx
+++ b/front/contracts-frontend/src/routes/Index.tsx
@@ -0,0 +1,14 @@
+import { Routes, Route } from 'react-router-dom';
+import ContractsList from '@/features/contracts/pages/ContractsList';
+import ContractDetail from '@/features/contracts/pages/ContractDetail';
+import ContractCreate from '@/features/contracts/pages/ContractCreate';
+
+export default function AppRoutes() {
+  return (
+      <Routes>
+        <Route path="/" element={<ContractsList />} />
+        <Route path="/contracts/:id" element={<ContractDetail />} />
+        <Route path="/contracts/new" element={<ContractCreate />} />
+      </Routes>
+  );
+}
--- a/front/contracts-frontend/src/styles/brand-proxima.css
+++ b/front/contracts-frontend/src/styles/brand-proxima.css
@@ -0,0 +1,58 @@
+:root {
+  --brand-bg:            #051622;
+  --brand-bg-alt:        #0f2432;
+  --brand-bg-hover:      #2d6588;
+  --brand-border:        #113345;
+
+  --brand-text:          #e5f2f7;
+  --brand-heading:       #ffffff;
+
+  
+  --brand-primary:       #00d68f;
+  --brand-primary-hover: #00b67a;
+}
+
+:root {
+  --bs-body-bg:          var(--brand-bg);
+  --bs-body-color:       var(--brand-text);
+  --bs-border-color:     var(--brand-border);
+  --bs-heading-color:    var(--brand-heading);
+
+  --bs-primary:          var(--brand-primary);
+  --bs-primary-rgb:      0,214,143;
+  --bs-link-color:       var(--brand-primary);
+  --bs-link-hover-color: var(--brand-primary-hover);
+}
+
+
+.table-contracts {
+  --bs-table-color: var(--brand-text);
+  --bs-table-bg:    transparent;
+  --bs-table-border-color: var(--brand-border);
+}
+
+.table-contracts > thead > tr {
+  background-color: #0b1e2c;
+  color: var(--brand-heading);
+}
+
+.table-contracts > tbody > tr:nth-of-type(odd)  { background-color: var(--brand-bg-alt); }
+.table-contracts > tbody > tr:nth-of-type(even) { background-color: var(--brand-bg); }
+
+.table-contracts > tbody > tr:hover {
+  background-color: var(--brand-bg-hover);
+  outline: 1px solid var(--brand-primary-hover);
+  outline-offset: -1px; 
+}
+
+
+.btn-primary {
+  background-color: var(--brand-primary);
+  border-color: var(--brand-primary);
+  color:#051622
+}
+.btn-primary:hover,
+.btn-primary:focus {
+  background-color: var(--brand-primary-hover);
+  border-color: var(--brand-primary-hover);
+}
--- a/front/contracts-frontend/src/utils/http/ErrorHelper.ts
+++ b/front/contracts-frontend/src/utils/http/ErrorHelper.ts
@@ -0,0 +1,17 @@
+import { HttpError } from '@/utils/http/HttpError';
+
+export function getProblemMessage(err: unknown, fallback = 'Error inesperado') {
+  console.log("Hemos entrado aqui")
+  if (err instanceof HttpError) {
+    console.log(
+      err
+    )
+    console.log(
+      err.body
+    )
+    return err.body?.detail
+        ?? err.body?.title
+        ?? err.message;
+  }
+  return fallback;
+}
--- a/front/contracts-frontend/src/utils/http/Http.ts
+++ b/front/contracts-frontend/src/utils/http/Http.ts
@@ -0,0 +1,87 @@
+import { HttpError } from "./HttpError";
+import type { ProblemDetails } from './ProblemDetails'
+
+
+
+type Params = Record<string, string | number | boolean | undefined>;
+
+function buildQuery(params?: Params): string {
+  if (!params) return '';
+
+  const usp = new URLSearchParams();
+  for (const [key, value] of Object.entries(params)) {
+    if (value !== undefined) usp.append(key, String(value));
+  }
+  const qs = usp.toString();
+  return qs ? `?${qs}` : '';
+}
+
+interface RequestOptions<T> {
+  params?: Params;
+  body?: T;
+  headers?: HeadersInit;
+  timeout?: number;
+}
+
+const BASE_URL = import.meta.env.VITE_API_BASE_URL ?? '/api';
+
+
+
+async function request<R, B = unknown>(
+  method: 'GET' | 'POST' | 'PUT',
+  url: string,
+  { params, body, headers, timeout = 15_000 }: RequestOptions<B> = {}
+): Promise<R> {
+  const controller = new AbortController();
+  const id =
+    timeout >= 0 ? setTimeout(() => controller.abort(), timeout) : null;
+
+  try {
+    const q = buildQuery(params);
+
+    const res = await fetch(`${BASE_URL}${url}${q}`, {
+      method,
+      headers: {
+        Accept: 'application/json',
+        'Content-Type': 'application/json',
+        ...headers,
+      },
+      body: body ? JSON.stringify(body) : undefined,
+      signal: controller.signal,
+      credentials: 'include',
+    });
+
+    const contentType = res.headers.get('Content-Type') ?? '';
+    const isJson = /application\/(json|problem\+json)/i.test(contentType);
+
+    const raw = await res.text();
+
+    if (!res.ok) {
+      const problem: ProblemDetails | null =
+        isJson && raw ? JSON.parse(raw) : null;
+      throw new HttpError(res.status, res.statusText, problem);
+    }
+
+    const data: R =
+      isJson && raw ? (JSON.parse(raw) as R) : (undefined as unknown as R);
+
+    return data;
+  } finally {
+    if (id) clearTimeout(id);
+  }
+}
+
+export const get = <R>(url: string, options?: RequestOptions<never>) =>
+  request<R>('GET', url, options);
+
+export const post = <R, B = unknown>(
+  url: string,
+  body: B,
+  options?: Omit<RequestOptions<B>, 'body'>
+) => request<R, B>('POST', url, { ...options, body });
+
+export const put = <R, B = unknown>(
+  url: string,
+  body: B,
+  options?: Omit<RequestOptions<B>, 'body'>
+) => request<R, B>('PUT', url, { ...options, body });
--- a/front/contracts-frontend/src/utils/http/HttpError.ts
+++ b/front/contracts-frontend/src/utils/http/HttpError.ts
@@ -0,0 +1,19 @@
+import type { ProblemDetails } from './ProblemDetails';
+
+export class HttpError extends Error {
+  public readonly status: number;
+  public readonly statusText: string;
+  public readonly body: ProblemDetails | null;
+
+  constructor(
+    status: number,
+    statusText: string,
+    body: ProblemDetails | null
+  ) {
+    super(`${status} ${statusText}`);
+    this.name = 'HttpError';
+    this.status = status;
+    this.statusText = statusText;
+    this.body = body;
+  }
+}
--- a/front/contracts-frontend/src/utils/http/ProblemDetails.ts
+++ b/front/contracts-frontend/src/utils/http/ProblemDetails.ts
@@ -0,0 +1,7 @@
+export interface ProblemDetails {
+  type?: string;
+  title?: string;
+  status?: number;
+  detail?: string;
+  instance?: string;
+}
--- a/front/contracts-frontend/src/utils/validations/MaxLengthNonEmpty.ts
+++ b/front/contracts-frontend/src/utils/validations/MaxLengthNonEmpty.ts
@@ -0,0 +1,11 @@
+export const maxLengthNonEmpty =
+  (max: number) =>
+  (value: unknown): true | string => {
+    const str = (value ?? '').toString().trim();
+
+    if (!str) return 'Campo obligatorio'; 
+    if (str.length > max)
+      return `Debe tener como máximo ${max} caracteres`;
+
+    return true;
+  };
--- a/front/contracts-frontend/src/utils/validations/ValidateNifNie.ts
+++ b/front/contracts-frontend/src/utils/validations/ValidateNifNie.ts
@@ -0,0 +1,27 @@
+export const validateNifNie = (value: unknown): true | string => {
+  if (typeof value !== 'string') return 'Formato no válido';
+
+  const sanitized = value.toUpperCase().replace(/[\s-]/g, '');
+  const nifReg  = /^[0-9]{8}[A-Z]$/;
+  const nieReg  = /^[XYZ][0-9]{7}[A-Z]$/;
+  const letters = 'TRWAGMYFPDXBNJZSQVHLCKE';
+
+  let number: number;
+  let control: string;
+
+  if (nifReg.test(sanitized)) {
+    number  = parseInt(sanitized.slice(0, 8), 10);
+    control = sanitized[8];
+  } else if (nieReg.test(sanitized)) {
+    const prefix = { X: '0', Y: '1', Z: '2' }[sanitized[0] as 'X' | 'Y' | 'Z'];
+    number  = parseInt(prefix + sanitized.slice(1, 8), 10);
+    control = sanitized[8];
+  } else {
+    return 'Formato de NIF/NIE inválido';
+  }
+
+  const expected = letters[number % 23];
+  return expected === control
+    ? true
+    : 'Dígito de control incorrecto';
+};
--- a/front/contracts-frontend/src/utils/validations/dateValidators.ts
+++ b/front/contracts-frontend/src/utils/validations/dateValidators.ts
@@ -0,0 +1,49 @@
+
+const parseToDate = (raw: string): Date | null => {
+  const trimmed = raw.trim();
+  let day: number, month: number, year: number;
+
+  const slashMatch = /^(\d{2})\/(\d{2})\/(\d{4})$/.exec(trimmed);
+  if (slashMatch) {
+    [, day, month, year] = slashMatch.map(Number);
+  } else {
+    const dashMatch = /^(\d{4})-(\d{2})-(\d{2})$/.exec(trimmed);
+    if (!dashMatch) return null;
+    [, year, month, day] = dashMatch.map(Number);
+  }
+
+  const date = new Date(year, month - 1, day);
+  return date.getFullYear() === year &&
+    date.getMonth() === month - 1 &&
+    date.getDate() === day
+    ? date
+    : null;
+};
+
+export const minDate =
+  (min: string) =>
+  (value: unknown): true | string => {
+    const reference = parseToDate(min);
+    const dateVal   = typeof value === 'string' ? parseToDate(value) : null;
+
+    if (!reference) throw new Error('minDate: formato de fecha incorrecto');
+    if (!dateVal)   return 'Fecha inválida';
+
+    return dateVal >= reference
+      ? true
+      : `Debe ser igual o posterior a ${min}`;
+  };
+
+export const maxDate =
+  (max: string) =>
+  (value: unknown): true | string => {
+    const reference = parseToDate(max);
+    const dateVal   = typeof value === 'string' ? parseToDate(value) : null;
+
+    if (!reference) throw new Error('maxDate: formato de fecha incorrecto');
+    if (!dateVal)   return 'Fecha inválida';
+
+    return dateVal <= reference
+      ? true
+      : `Debe ser igual o anterior a ${max}`;
+  };
--- a/Show More
+++ b/Show More
				`@@ -0,0 +1,2 @@`
				`@ProximaContracts.API_HostAddress = http://localhost:5009`
				`@@ -0,0 +1 @@`
				`VITE_API_BASE_URL=http://localhost:5009/api`
				`@@ -0,0 +1 @@`
				`VITE_API_BASE_URL=https://quediaempiezo.asarmientotest.es/api`