ERC20 Withdraw (#87)

src/contracts/transfer-gateway.ts

@@ -4,6 +4,7 @@ import { Contract } from '../contract'
 import { Address } from '../address'
 import {
   TransferGatewayWithdrawERC721Request,
+  TransferGatewayWithdrawERC20Request,
   TransferGatewayWithdrawalReceiptRequest,
   TransferGatewayWithdrawalReceiptResponse,
   TransferGatewayWithdrawalReceipt,
@@ -128,6 +129,14 @@ export class TransferGateway extends Contract {
     return this.callAsync<void>('WithdrawERC721', tgWithdrawERC721Req)
   }
 
+  withdrawERC20Async(amount: BN, tokenContract: Address): Promise<void> {
+    const tgWithdrawERC20Req = new TransferGatewayWithdrawERC20Request()
+    tgWithdrawERC20Req.setAmount(marshalBigUIntPB(amount))
+    tgWithdrawERC20Req.setTokenContract(tokenContract.MarshalPB())
+
+    return this.callAsync<void>('WithdrawERC20', tgWithdrawERC20Req)
+  }
+
   async withdrawalReceiptAsync(owner: Address): Promise<IWithdrawalReceipt | null> {
     const tgWithdrawReceiptReq = new TransferGatewayWithdrawalReceiptRequest()
     tgWithdrawReceiptReq.setOwner(owner.MarshalPB())

src/proto/transfer_gateway.proto

@@ -51,8 +51,13 @@ message TransferGatewayWithdrawERC721Request {
     BigUInt token_id = 1;
     // DAppChain address of ERC721 contract token belongs to
     Address token_contract = 2;
-    // DAppChain address of the current owner of the token
-    //Address token_owner = 3;
+}
+
+message TransferGatewayWithdrawERC20Request {
+    // Amount of tokens to withdraw
+    BigUInt amount = 1;
+    // DAppChain address of ERC20 contract tokens belongs to
+    Address token_contract = 2;
 }
 
 message TransferGatewayWithdrawalReceiptRequest {

src/proto/transfer_gateway_pb.d.ts

@@ -152,6 +152,34 @@ export namespace TransferGatewayWithdrawERC721Request {
   }
 }
 
+export class TransferGatewayWithdrawERC20Request extends jspb.Message {
+  hasAmount(): boolean;
+  clearAmount(): void;
+  getAmount(): proto_loom_pb.BigUInt | undefined;
+  setAmount(value?: proto_loom_pb.BigUInt): void;
+
+  hasTokenContract(): boolean;
+  clearTokenContract(): void;
+  getTokenContract(): proto_loom_pb.Address | undefined;
+  setTokenContract(value?: proto_loom_pb.Address): void;
+
+  serializeBinary(): Uint8Array;
+  toObject(includeInstance?: boolean): TransferGatewayWithdrawERC20Request.AsObject;
+  static toObject(includeInstance: boolean, msg: TransferGatewayWithdrawERC20Request): TransferGatewayWithdrawERC20Request.AsObject;
+  static extensions: {[key: number]: jspb.ExtensionFieldInfo<jspb.Message>};
+  static extensionsBinary: {[key: number]: jspb.ExtensionFieldBinaryInfo<jspb.Message>};
+  static serializeBinaryToWriter(message: TransferGatewayWithdrawERC20Request, writer: jspb.BinaryWriter): void;
+  static deserializeBinary(bytes: Uint8Array): TransferGatewayWithdrawERC20Request;
+  static deserializeBinaryFromReader(message: TransferGatewayWithdrawERC20Request, reader: jspb.BinaryReader): TransferGatewayWithdrawERC20Request;
+}
+
+export namespace TransferGatewayWithdrawERC20Request {
+  export type AsObject = {
+    amount?: proto_loom_pb.BigUInt.AsObject,
+    tokenContract?: proto_loom_pb.Address.AsObject,
+  }
+}
+
 export class TransferGatewayWithdrawalReceiptRequest extends jspb.Message {
   hasOwner(): boolean;
   clearOwner(): void;