Sending transaction with data on Coinbase Wallet Mobile fails

[comster]

Ethers Version

6.13.2

Search Terms

coinbase

Describe the Problem

Trying to send a transaction with data, or a contract call, are not working on coinbase wallet mobile browser. It's working in the browser with coinbase wallet, and metamask, and metamask mobile. I approve the transaction, but then get an RPC error: "Failed to sign transaction".

Things I have done to debug:

• Removing the transaction data works
• I've been able to send transaction data of only "1", but even simple data like "test" does not work
• Adjusting transaction parameters like gas, network, nonce etc. have not worked

Code Snippet

No response

Contract ABI

No response

Errors

could not coalesce error (error={ "code": -32603, "data": { "originalError": { } }, "message": "Failed to sign transaction" }, payload={ "id": 6, "jsonrpc": "2.0", "method": "eth_sendTransaction", "params": [ { "data": "0x000000000...", "from": "0xafac00f3b608ddc9df671225029844d76a10af6d", "gas": "0x8f77", "to": "0x5493db14a2b6fd71b531fa1cfc752fdfad734acd", "value": "0x16bcc41e900000" } ] }, code=UNKNOWN_ERROR, version=6.13.0)

Environment

Ethereum (mainnet/ropsten/rinkeby/goerli), Other (please specify)

Environment (Other)

Coinbase Wallet Mobile Browser

[ricmoo]

Hmmm. I haven’t used coinbase wallet. Is it a browser plugin, similar to MetaMask?

How are you creating the Signer?

[comster]

Thanks for your help! Ya, it's similar to MetaMask afaik. Again, it's only on mobile in their in app browser where this isn't working, which is strange. And if I remove the data it works fine.

let provider = new ethers.BrowserProvider(window.ethereum);
let signer = await provider.getSigner();
const tx = await signer.sendTransaction({
  to: toAddress,
  value: ethers.parseEther(amount),
  data: ethers.AbiCoder.defaultAbiCoder().encode([{"name":"_value","type":"string"}], [DATA_VALUE_UNENCODED])
});

[comster]

And for DATA_VALUE_UNENCODED of a single character string like "Z" works, but not for "ZA" 🤔

[ricmoo]

That’s is super weird. :p

I’m guessing no console? If it is on iOS can you connect it to Safari and see any other errors in the console?

Do they have a GitHub repo? With issues we can search?

[comster]

No I don't think so. It's an embedded browser in their app. It's not open source. I've reached out to them but haven't had a response yet. Just curious if you have any tips on other things I could test or debug. I can't tell if this is an issue with my code, ethers, or the wallet provider. Smells like the wallet provider, but I assume others aren't having this issue. Otherwise I'm giving up and going to restart my project with the newer react components available 🤷 .

[comster]

For anyone else experiencing this issue, it turns out I had to figure out the gasLimit myself.

Any insight into where in the stack this issue is at? I assume it's the coinbase wallet not properly calculating the gaslimit themselves, based on the data/input size. It would be great to raise this issue with the appropriate channel to help resolve this.

        const transactionRequest = {
          to: address,
          value: amount,
          data: getEncodedEthData(data_str),
        };
        const estimatedGas = await signer.estimateGas(transactionRequest);
        const gasLimit = estimatedGas * BigInt(1000) / BigInt(100); // 10x the gas price for coinbase mobile wallet
        const tx = await signer.sendTransaction({
          ...transactionRequest,
          gasLimit: gasLimit,
        });