Copied WithdrawalMessageProcessor to library package

Author: rpanic

packages/library/src/protocol/WithdrawalMessageProcessor.ts

@@ -0,0 +1,36 @@
+import {
+  MessageProcessorArgs,
+  OutgoingMessageProcessor,
+  outgoingMessageProcessor,
+} from "@proto-kit/protocol";
+import { AccountUpdate, TokenId } from "o1js";
+
+import { Withdrawal } from "../runtime/Withdrawals";
+
+@outgoingMessageProcessor()
+export class WithdrawalMessageProcessor extends OutgoingMessageProcessor<Withdrawal> {
+  type = Withdrawal;
+
+  messageType = "withdrawal";
+
+  dummy(): Withdrawal {
+    return Withdrawal.dummy();
+  }
+
+  process(
+    message: Withdrawal,
+    { bridgeContract }: MessageProcessorArgs
+  ): AccountUpdate[] {
+    const subTokenId = TokenId.derive(
+      bridgeContract.publicKey,
+      bridgeContract.tokenId
+    );
+    const mintAccountUpdate = AccountUpdate.default(
+      message.address,
+      subTokenId
+    );
+    mintAccountUpdate.balance.addInPlace(message.amount);
+    mintAccountUpdate.label = "Withdrawal processor: mint token";
+    return [mintAccountUpdate];
+  }
+}