fix: transfer action fix elizaOS#735

Author: nicky-ru

packages/plugin-evm/src/actions/transfer.ts

@@ -9,20 +9,14 @@ export { transferTemplate };
 export class TransferAction {
     constructor(private walletProvider: WalletProvider) {}
 
-    async transfer(
-        runtime: IAgentRuntime,
-        params: TransferParams
-    ): Promise<Transaction> {
+    async transfer(params: TransferParams): Promise<Transaction> {
         const walletClient = this.walletProvider.getWalletClient(
             params.fromChain
         );
-        const [fromAddress] = await walletClient.getAddresses();
-
-        this.walletProvider.switchChain(params.fromChain);
 
         try {
             const hash = await walletClient.sendTransaction({
-                account: fromAddress,
+                account: walletClient.account,
                 to: params.toAddress,
                 value: parseEther(params.amount),
                 data: params.data as Hex,
@@ -42,7 +36,7 @@ export class TransferAction {
 
             return {
                 hash,
-                from: fromAddress,
+                from: walletClient.account.address,
                 to: params.toAddress,
                 value: parseEther(params.amount),
                 data: params.data as Hex,
@@ -67,7 +61,7 @@ export const transferAction = {
         ) as `0x${string}`;
         const walletProvider = new WalletProvider(privateKey);
         const action = new TransferAction(walletProvider);
-        return action.transfer(runtime, options);
+        return action.transfer(options);
     },
     template: transferTemplate,
     validate: async (runtime: IAgentRuntime) => {

packages/plugin-evm/src/providers/wallet.ts

@@ -10,6 +10,7 @@ import {
     type HttpTransport,
     type Address,
     Account,
+    PrivateKeyAccount,
 } from "viem";
 import * as viemChains from "viem/chains";
 import { privateKeyToAccount } from "viem/accounts";
@@ -19,7 +20,7 @@ import type { SupportedChain } from "../types";
 export class WalletProvider {
     private currentChain: SupportedChain = "mainnet";
     chains: Record<string, Chain> = { mainnet: viemChains.mainnet };
-    account: Account;
+    account: PrivateKeyAccount;
 
     constructor(privateKey: `0x${string}`, chains?: Record<string, Chain>) {
         this.setAccount(privateKey);
@@ -38,15 +39,25 @@ export class WalletProvider {
         return this.chains[this.currentChain];
     }
 
-    getPublicClient(
-        chainName: SupportedChain
-    ): PublicClient<HttpTransport, Chain, Account | undefined> {
-        const { publicClient } = this.createClients(chainName);
+    getPublicClient(chainName: SupportedChain): PublicClient<HttpTransport, Chain, Account | undefined> {
+        const transport = this.createHttpTransport(chainName);
+
+        const publicClient = createPublicClient({
+            chain: this.chains[chainName],
+            transport,
+        })
         return publicClient;
     }
 
-    getWalletClient(chainName: SupportedChain): WalletClient {
-        const { walletClient } = this.createClients(chainName);
+    getWalletClient(chainName: SupportedChain):WalletClient {
+        const transport = this.createHttpTransport(chainName);
+
+        const walletClient = createWalletClient({
+            chain: this.chains[chainName],
+            transport,
+            account: this.account,
+        })
+
         return walletClient;
     }
 
@@ -129,23 +140,6 @@ export class WalletProvider {
         return http(chain.rpcUrls.default.http[0]);
     };
 
-    private createClients = (chain: SupportedChain) => {
-        const transport = this.createHttpTransport(chain);
-
-        return {
-            chain: this.chains[chain],
-            publicClient: createPublicClient({
-                chain: this.chains[chain],
-                transport,
-            }),
-            walletClient: createWalletClient<HttpTransport>({
-                chain: this.chains[chain],
-                transport,
-                account: this.account,
-            }),
-        };
-    };
-
     static genChainFromName(
         chainName: string,
         customRpcUrl?: string | null

packages/plugin-evm/src/tests/transfer.test.ts

@@ -0,0 +1,55 @@
+import { describe, it, expect, beforeEach } from "vitest";
+import { generatePrivateKey, privateKeyToAccount } from "viem/accounts";
+import { Account, Chain } from "viem";
+
+import { TransferAction } from "../actions/transfer";
+import { WalletProvider } from "../providers/wallet";
+
+describe("Transfer Action", () => {
+    let wp: WalletProvider;
+
+    beforeEach(async () => {
+        const pk = generatePrivateKey();
+        const customChains = prepareChains();
+        wp = new WalletProvider(pk, customChains);
+    });
+    describe("Constructor", () => {
+        it("should initialize with wallet provider", () => {
+            const ta = new TransferAction(wp);
+
+            expect(ta).to.toBeDefined();
+        });
+    });
+    describe("Transfer", () => {
+        let ta: TransferAction;
+        let receiver: Account;
+
+        beforeEach(() => {
+            ta = new TransferAction(wp);
+            receiver = privateKeyToAccount(generatePrivateKey());
+        });
+
+        it("throws if not enough gas", async () => {
+            await expect(
+                ta.transfer({
+                    fromChain: "iotexTestnet",
+                    toAddress: receiver.address,
+                    amount: "1",
+                })
+            ).rejects.toThrow(
+                "Transfer failed: The total cost (gas * gas fee + value) of executing this transaction exceeds the balance of the account."
+            );
+        });
+    });
+});
+
+const prepareChains = () => {
+    let customChains: Record<string, Chain> = {};
+    const chainNames = ["iotexTestnet"];
+    chainNames.forEach(
+        (chain) =>
+            (customChains[chain] = WalletProvider.genChainFromName(chain))
+    );
+
+    return customChains;
+};