Return extra funds to owner on successful deployment

packages/backend/src/registry.ts

@@ -483,6 +483,21 @@ export class Registry {
     return this.registry.getAuctionsByIds([auctionId]);
   }
 
+  async sendTokensToAccount(receiverAddress: string, amount: string): Promise<any> {
+    const fee = parseGasAndFees(this.registryConfig.fee.gas, this.registryConfig.fee.fees);
+    await registryTransactionWithRetry(() =>
+      this.registry.sendCoins(
+        {
+          amount,
+          denom: 'tlnt',
+          destinationAddress: receiverAddress
+        },
+        this.registryConfig.privateKey,
+        fee
+      )
+    );
+  }
+
   getLrn(appName: string): string {
     assert(this.registryConfig.authority, "Authority doesn't exist");
     return `lrn://${this.registryConfig.authority}/applications/${appName}`;

packages/backend/src/service.ts

@@ -212,6 +212,9 @@ export class Service {
         if (!deployment.project.fundsReleased) {
           const fundsReleased = await this.releaseDeployerFundsByProjectId(deployment.projectId);
 
+          // Return remaining amount to owner
+          await this.returnCreatorFundsByProjectId(deployment.projectId);
+
           await this.db.updateProjectById(deployment.projectId, {
             fundsReleased,
           });
@@ -1324,6 +1327,24 @@ export class Service {
     return false;
   }
 
+  async returnCreatorFundsByProjectId(projectId: string) {
+    const project = await this.db.getProjectById(projectId);
+
+    if (!project || !project.auctionId) {
+      log(`Project ${projectId} ${!project ? 'not found' : 'does not have an auction'}`);
+
+      return false;
+    }
+
+    const auction = await this.getAuctionData(project.auctionId);
+    const amountToBeReturned = auction.winnerPrice * auction.numProviders
+
+    await this.laconicRegistry.sendTokensToAccount(
+      project.paymentAddress,
+      amountToBeReturned.toString()
+    );
+  }
+
   async getDeployers(): Promise<Deployer[]> {
     const dbDeployers = await this.db.getDeployers();