Many signatures for one dispenser

src/DispenserProvider.DataBase/DispenserContext.cs

@@ -40,10 +40,9 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
                     x => new EthereumAddress(x)
                 );
 
-            entity.HasOne(e => e.UserSignature)
+            entity.HasMany(e => e.UserSignatures)
                 .WithOne(e => e.Dispenser)
-                .HasForeignKey<DispenserDTO>(e => e.Signature)
-                .IsRequired(false)
+                .HasForeignKey(e => e.DispenserId)
                 .OnDelete(DeleteBehavior.Restrict);
 
             entity.HasOne(e => e.WithdrawalDetail)

src/DispenserProvider.DataBase/Models/DispenserDTO.cs

@@ -15,9 +15,7 @@ public class DispenserDTO
     [Column(TypeName = "datetime2(0)")]
     public DateTime? RefundFinishTime { get; set; }
 
-    [Column(TypeName = "nvarchar(132)")]
-    public string? Signature { get; set; }
-    public virtual SignatureDTO? UserSignature { get; set; } = null!;
+    public virtual List<SignatureDTO> UserSignatures { get; set; } = [];
 
     public long WithdrawalDetailId { get; set; }
     public virtual TransactionDetailDTO WithdrawalDetail { get; set; } = null!;

src/DispenserProvider.DataBase/Models/SignatureDTO.cs

@@ -15,5 +15,7 @@ public class SignatureDTO
 
     public bool IsRefund { get; set; }
 
+    [Column(TypeName = "nvarchar(64)")]
+    public string DispenserId { get; set; } = null!;
     public virtual DispenserDTO Dispenser { get; set; } = null!;
 }

src/DispenserProvider.Migrations/Migrations/20241224095922_Many-Signatures-To-One-Dispenser.cs

@@ -0,0 +1,83 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace DispenserProvider.DataBase.Migrations
+{
+    /// <inheritdoc />
+    public partial class ManySignaturesToOneDispenser : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Dispenser_Signatures_Signature",
+                table: "Dispenser");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Dispenser_Signature",
+                table: "Dispenser");
+
+            migrationBuilder.DropColumn(
+                name: "Signature",
+                table: "Dispenser");
+
+            migrationBuilder.AddColumn<string>(
+                name: "DispenserId",
+                table: "Signatures",
+                type: "nvarchar(64)",
+                nullable: false,
+                defaultValue: "");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Signatures_DispenserId",
+                table: "Signatures",
+                column: "DispenserId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Signatures_Dispenser_DispenserId",
+                table: "Signatures",
+                column: "DispenserId",
+                principalTable: "Dispenser",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Signatures_Dispenser_DispenserId",
+                table: "Signatures");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Signatures_DispenserId",
+                table: "Signatures");
+
+            migrationBuilder.DropColumn(
+                name: "DispenserId",
+                table: "Signatures");
+
+            migrationBuilder.AddColumn<string>(
+                name: "Signature",
+                table: "Dispenser",
+                type: "nvarchar(132)",
+                nullable: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Dispenser_Signature",
+                table: "Dispenser",
+                column: "Signature",
+                unique: true,
+                filter: "[Signature] IS NOT NULL");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Dispenser_Signatures_Signature",
+                table: "Dispenser",
+                column: "Signature",
+                principalTable: "Signatures",
+                principalColumn: "Signature",
+                onDelete: ReferentialAction.Restrict);
+        }
+    }
+}