feat: resolve #253, #254, #255, and #256

.env.example

@@ -13,6 +13,7 @@ PORT=4000
 STELLAR_NETWORK=testnet
 # Soroban RPC endpoint
 SOROBAN_RPC_URL=https://soroban-testnet.stellar.org
+STELLAR_SIGNER_SECRET_KEY=
 
 # Deployed contract IDs (leave blank until deployed)
 SETTLEMENT_CONTRACT_ID=

src/config/configuration.ts

@@ -40,6 +40,7 @@ export interface AppConfig {
     sorobanRpcUrl: string;
     settlementContractId: string;
     solverRegistryContractId: string;
+    signerSecretKey: string;
     // Secret key for the backend's Soroban signer. Empty outside production
     // (no on-chain write path exists yet); envValidationSchema requires and
     // format-checks it in production so it can never silently fall back to
@@ -65,6 +66,7 @@ export default (): AppConfig => ({
     sorobanRpcUrl: process.env.SOROBAN_RPC_URL ?? "https://soroban-testnet.stellar.org",
     settlementContractId: process.env.SETTLEMENT_CONTRACT_ID ?? "",
     solverRegistryContractId: process.env.SOLVER_REGISTRY_CONTRACT_ID ?? "",
+    signerSecretKey: process.env.STELLAR_SIGNER_SECRET_KEY ?? "",
     signingKey: process.env.SOROBAN_SIGNING_KEY ?? "",
     feePercentile: (process.env.SOROBAN_FEE_PERCENTILE ?? "p50") as FeePercentile,
   },

src/config/env.validation.ts

@@ -19,6 +19,7 @@ export const envValidationSchema = Joi.object({
   SOROBAN_RPC_URL: Joi.string().uri().default("https://soroban-testnet.stellar.org"),
   SETTLEMENT_CONTRACT_ID: Joi.string().allow("").default(""),
   SOLVER_REGISTRY_CONTRACT_ID: Joi.string().allow("").default(""),
+  STELLAR_SIGNER_SECRET_KEY: Joi.string().allow("").default(""),
 
   // Secret key for the backend's own Soroban signer (submits on-chain writes
   // such as settlement and slashing calls). No default is provided anywhere

src/soroban/soroban.module.ts

@@ -7,6 +7,7 @@ import { SignerService } from "./signer.service";
 import { StellarTxService } from "./stellar-tx.service";
 
 @Module({
+  imports: [forwardRef(() => IntentsModule)],
   controllers: [SorobanController],
   providers: [
     SorobanService,