diff --git a/src/DispenserProvider.DataBase/Models/BuilderDTO.cs b/src/DispenserProvider.DataBase/Models/BuilderDTO.cs
index 60bba87..7e8bd55 100644
--- a/src/DispenserProvider.DataBase/Models/BuilderDTO.cs
+++ b/src/DispenserProvider.DataBase/Models/BuilderDTO.cs
@@ -9,8 +9,8 @@ public class BuilderDTO
     [Column(TypeName = "nvarchar(42)")]
     public string ProviderAddress { get; set; } = null!;
 
-    [Column(TypeName = "decimal(36,18)")]
-    public decimal Amount { get; set; }
+    [Column(TypeName = "nvarchar(78)")]
+    public string WeiAmount { get; set; } = null!;
 
     [Column(TypeName = "datetime2(0)")]
     public DateTime? StartTime { get; set; }
diff --git a/src/DispenserProvider.Migrations/Migrations/20241213123343_Update-Amount-To-WeiAmount.Designer.cs b/src/DispenserProvider.Migrations/Migrations/20241213123343_Update-Amount-To-WeiAmount.Designer.cs
new file mode 100644
index 0000000..f32b6b0
--- /dev/null
+++ b/src/DispenserProvider.Migrations/Migrations/20241213123343_Update-Amount-To-WeiAmount.Designer.cs
@@ -0,0 +1,237 @@
+// <auto-generated />
+using System;
+using DispenserProvider.DataBase;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace DispenserProvider.DataBase.Migrations
+{
+    [DbContext(typeof(DispenserContext))]
+    [Migration("20241213123343_Update-Amount-To-WeiAmount")]
+    partial class UpdateAmountToWeiAmount
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.8")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("DispenserProvider.DataBase.Models.BuilderDTO", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime?>("FinishTime")
+                        .HasColumnType("datetime2(0)");
+
+                    b.Property<string>("ProviderAddress")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(42)");
+
+                    b.Property<DateTime?>("StartTime")
+                        .HasColumnType("datetime2(0)");
+
+                    b.Property<long>("TransactionDetailId")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("WeiAmount")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(78)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("TransactionDetailId");
+
+                    b.ToTable("Builders");
+                });
+
+            modelBuilder.Entity("DispenserProvider.DataBase.Models.DispenserDTO", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<string>("CreationLogSignature")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(132)");
+
+                    b.Property<string>("DeletionLogSignature")
+                        .HasColumnType("nvarchar(132)");
+
+                    b.Property<long?>("RefundDetailId")
+                        .HasColumnType("bigint");
+
+                    b.Property<DateTime>("RefundFinishTime")
+                        .HasColumnType("datetime2(0)");
+
+                    b.Property<string>("Signature")
+                        .HasColumnType("nvarchar(132)");
+
+                    b.Property<string>("UserAddress")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(42)");
+
+                    b.Property<long>("WithdrawalDetailId")
+                        .HasColumnType("bigint");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CreationLogSignature");
+
+                    b.HasIndex("DeletionLogSignature");
+
+                    b.HasIndex("RefundDetailId")
+                        .IsUnique()
+                        .HasFilter("[RefundDetailId] IS NOT NULL");
+
+                    b.HasIndex("Signature")
+                        .IsUnique()
+                        .HasFilter("[Signature] IS NOT NULL");
+
+                    b.HasIndex("WithdrawalDetailId")
+                        .IsUnique();
+
+                    b.ToTable("Dispenser");
+                });
+
+            modelBuilder.Entity("DispenserProvider.DataBase.Models.LogDTO", b =>
+                {
+                    b.Property<string>("Signature")
+                        .HasColumnType("nvarchar(132)");
+
+                    b.Property<DateTime>("CreationTime")
+                        .HasColumnType("datetime2(0)");
+
+                    b.Property<string>("Operation")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(32)");
+
+                    b.HasKey("Signature");
+
+                    b.ToTable("Logs");
+                });
+
+            modelBuilder.Entity("DispenserProvider.DataBase.Models.SignatureDTO", b =>
+                {
+                    b.Property<string>("Signature")
+                        .HasColumnType("nvarchar(132)");
+
+                    b.Property<bool>("IsRefund")
+                        .HasColumnType("bit");
+
+                    b.Property<DateTime>("ValidFrom")
+                        .HasColumnType("datetime2(0)");
+
+                    b.Property<DateTime>("ValidUntil")
+                        .HasColumnType("datetime2(0)");
+
+                    b.HasKey("Signature");
+
+                    b.ToTable("Signatures");
+                });
+
+            modelBuilder.Entity("DispenserProvider.DataBase.Models.TransactionDetailDTO", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<long>("ChainId")
+                        .HasColumnType("bigint");
+
+                    b.Property<long>("PoolId")
+                        .HasColumnType("bigint");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("TransactionDetails");
+                });
+
+            modelBuilder.Entity("DispenserProvider.DataBase.Models.BuilderDTO", b =>
+                {
+                    b.HasOne("DispenserProvider.DataBase.Models.TransactionDetailDTO", "TransactionDetail")
+                        .WithMany("Builders")
+                        .HasForeignKey("TransactionDetailId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("TransactionDetail");
+                });
+
+            modelBuilder.Entity("DispenserProvider.DataBase.Models.DispenserDTO", b =>
+                {
+                    b.HasOne("DispenserProvider.DataBase.Models.LogDTO", "CreationLog")
+                        .WithMany("CreationDispensers")
+                        .HasForeignKey("CreationLogSignature")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DispenserProvider.DataBase.Models.LogDTO", "DeletionLog")
+                        .WithMany("DeletionDispensers")
+                        .HasForeignKey("DeletionLogSignature")
+                        .OnDelete(DeleteBehavior.Restrict);
+
+                    b.HasOne("DispenserProvider.DataBase.Models.TransactionDetailDTO", "RefundDetail")
+                        .WithOne()
+                        .HasForeignKey("DispenserProvider.DataBase.Models.DispenserDTO", "RefundDetailId")
+                        .OnDelete(DeleteBehavior.Restrict);
+
+                    b.HasOne("DispenserProvider.DataBase.Models.SignatureDTO", "UserSignature")
+                        .WithOne("Dispenser")
+                        .HasForeignKey("DispenserProvider.DataBase.Models.DispenserDTO", "Signature")
+                        .OnDelete(DeleteBehavior.Restrict);
+
+                    b.HasOne("DispenserProvider.DataBase.Models.TransactionDetailDTO", "WithdrawalDetail")
+                        .WithOne("Dispenser")
+                        .HasForeignKey("DispenserProvider.DataBase.Models.DispenserDTO", "WithdrawalDetailId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("CreationLog");
+
+                    b.Navigation("DeletionLog");
+
+                    b.Navigation("RefundDetail");
+
+                    b.Navigation("UserSignature");
+
+                    b.Navigation("WithdrawalDetail");
+                });
+
+            modelBuilder.Entity("DispenserProvider.DataBase.Models.LogDTO", b =>
+                {
+                    b.Navigation("CreationDispensers");
+
+                    b.Navigation("DeletionDispensers");
+                });
+
+            modelBuilder.Entity("DispenserProvider.DataBase.Models.SignatureDTO", b =>
+                {
+                    b.Navigation("Dispenser")
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("DispenserProvider.DataBase.Models.TransactionDetailDTO", b =>
+                {
+                    b.Navigation("Builders");
+
+                    b.Navigation("Dispenser")
+                        .IsRequired();
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/src/DispenserProvider.Migrations/Migrations/20241213123343_Update-Amount-To-WeiAmount.cs b/src/DispenserProvider.Migrations/Migrations/20241213123343_Update-Amount-To-WeiAmount.cs
new file mode 100644
index 0000000..18d5022
--- /dev/null
+++ b/src/DispenserProvider.Migrations/Migrations/20241213123343_Update-Amount-To-WeiAmount.cs
@@ -0,0 +1,40 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace DispenserProvider.DataBase.Migrations
+{
+    /// <inheritdoc />
+    public partial class UpdateAmountToWeiAmount : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Amount",
+                table: "Builders");
+
+            migrationBuilder.AddColumn<string>(
+                name: "WeiAmount",
+                table: "Builders",
+                type: "nvarchar(78)",
+                nullable: false,
+                defaultValue: "");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "WeiAmount",
+                table: "Builders");
+
+            migrationBuilder.AddColumn<decimal>(
+                name: "Amount",
+                table: "Builders",
+                type: "decimal(36,18)",
+                nullable: false,
+                defaultValue: 0m);
+        }
+    }
+}
diff --git a/src/DispenserProvider.Migrations/Migrations/DispenserContextModelSnapshot.cs b/src/DispenserProvider.Migrations/Migrations/DispenserContextModelSnapshot.cs
index cc3fbe1..36a9d31 100644
--- a/src/DispenserProvider.Migrations/Migrations/DispenserContextModelSnapshot.cs
+++ b/src/DispenserProvider.Migrations/Migrations/DispenserContextModelSnapshot.cs
@@ -30,9 +30,6 @@ protected override void BuildModel(ModelBuilder modelBuilder)
 
                     SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<long>("Id"));
 
-                    b.Property<decimal>("Amount")
-                        .HasColumnType("decimal(36,18)");
-
                     b.Property<DateTime?>("FinishTime")
                         .HasColumnType("datetime2(0)");
 
@@ -46,6 +43,10 @@ protected override void BuildModel(ModelBuilder modelBuilder)
                     b.Property<long>("TransactionDetailId")
                         .HasColumnType("bigint");
 
+                    b.Property<string>("WeiAmount")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(78)");
+
                     b.HasKey("Id");
 
                     b.HasIndex("TransactionDetailId");