Metamask: How to call a function that requires payment? I get error={“code”:-32603,”message”:”Internal JSON-RPC error.”,”data”:{“code”:3,”message”:” The implementation was reversed”}

Handling Errors with Payment Functions in MetaMask

As a developer building decentralized applications (dApps) on the Ethereum blockchain, you are probably familiar with the importance of handling errors and exceptions when interacting with smart contracts. In this article, we will explore how to resolve an error that occurs when calling a payment function using the MetaMask signature method.

Understanding the Error

The error message provided indicates an internal JSON-RPC error. This is not unexpected as MetaMask typically handles errors internally and passes them on to the application code. However, it is essential to understand what this error means in order to resolve the issue.

The error has three components:

• code: 32603 – An Ethereum-specific code that indicates an internal error.

• message: Internal JSON-RPC Error – An error message that describes the cause of the error.

• data: { “code”: 3, “message”: “execution reverted” } – The details of the actual error.

Troubleshooting Steps

To resolve this issue, let’s break down the steps:

Step 1: Check the Ether Value

When calling a payment function, you must provide the correct amount of Ether (ETH) as input. To ensure that the Ether value is correct, check that it matches the expected price.

const etherValue = 0x01;
const transaction = {
// other properties
data: {
// other data
"gasPrice": 200000,
"gasLimit": 20000000,
"to": contractAddress,
"value": etherValue,
"nonce": 1,
"signer": await metamaskSigner. sign(transaction, { to: contractAddress }),
},
};

Step 2: Check the error message and code

Inspect the error message and code to understand what is happening. In this case, it looks like the execution rolled back error is being generated.

// inspect the error data
const error = transaction.data;
console.log(error); // { code: 3, message: "execution rolled back" }

Step 3: Handling the execution rolled back error

To handle the execution rolled back error, you can try the following:

• Increase the nonce value to prevent the contract from being executed multiple times.

• Try calling the function with a larger amount of Ether that has not yet been spent.

• Check if there are any pending transactions on the blockchain that could be causing the problem.

const transaction = {
// other properties
data: {
gasPrice: 200000,
gasLimit: 20000000,
to: contractAddress,
value: etherValue + 1000000, // increase the amount of Ether
nonce: 5, // increase the nonce value
signer: await metamaskSigner. sign(transaction, { to: contractAddress }),
},
};

Best practices

To avoid similar errors in the future:

• Always check that the ETH value matches the expected price when calling a payment function.

• Review the error message and code carefully to understand what is happening.

• If you are unsure about how to handle specific errors or exceptions, consult the official Ethereum documentation or seek help from the community.

By following these steps and best practices, you should be able to resolve the “execution rolled back” error when calling a payment function in MetaMask.