Metamask: Failing to sign a transaction with eth_sign

Metamask Error: Insufficient Ethereum Address to Sign Transaction

As a developer working on Ethereum-based blockchain projects, it is common to encounter errors when attempting to execute transactions using the “eth_sign” method. In this article, we will look at the issue of not signing a transaction and provide tips on how to resolve it.

Problem:

The error code “-32602” indicates that the transaction is invalid due to insufficient Ethereum address. The message states that the required parameter Ethereum address must be specified when calling the eth_sign method.

Code:

const { ether } = require("ether");
// Define a function that attempts to sign a transaction using eth_sign
async function signTransaction(address) {
try {
// Call the eth_sign method with the Ethereum address and callback function
await ethers.signTransaction({
to:address,
value: 1n, // Replace with the desired transaction amount (wei)
gas limit: 20000,
gasPrice: 20n,
nonce: 0,
}, async(error, receive) => {
if (error) {
console.error(error);
} else {
const signedTx = await Receive.rawTransaction;
console.log(signedTx);
}
});
} catch (error) {
console.error("Transaction signing error:", error);
}
}
// Call the signTransaction function with an Ethereum address example
signTransaction("0x...YourEthereumAddress...");

Problem :

In this example, we are trying to call eth_sign' from an asynchronous callback function. The problem occurs when we try to pass an empty or null string as the first argument (theto’ parameter). The Ethereum method eth_sign' requires a non-empty string at this position.

To resolve this issue, we need to provide a valid Ethereum address before callingeth_sign’. We can do this by removing the callback function and directly passing the desired transaction amount (wei) as the first argument. Here is the updated version of the code:

const { ether } = require("ether");
// Define a function that attempts to sign a transaction using eth_sign with an Ethereum address example
async function signTransaction(address) {
try {
// Instead of a callback function, call the eth_sign method directly using an empty string
const signedTx = await ethers.signTransaction({
value: 1n, // Replace with the desired transaction amount (wei)
gas limit: 20000,
gasPrice: 20n,
nonce: 0,
to:address,
}, async error => {
if (error) {
console.error(error);
} else {
const receive = await ethers.getSigner().signTransaction(signedTx);
console.log(receipt);
}
});
} catch (error) {
console.error("Error signing transaction:", error);
}
}
// Call the signTransaction function with an example Ethereum address
signTransaction("0x...YourEthereumAddress...");

Best Practices:

To avoid similar issues in your code, be sure to follow the best practices below.

• Always specify a valid Ethereum address when calling eth_sign'.

Following these guidelines, you should be able to successfully execute transactions using theeth_sign’ method. If you continue to experience issues, please do not hesitate to contact us for assistance.

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