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permissionless.js FAQs

Getting WaitForUserOperationReceiptTimeoutError?

This error is thrown when the bundler takes too long to bundle your user operation or the default timeout configured in permissionless.js is not enough. This could be due to the block time of the chain you are using is more than the default timeout.

The easiest way to fix this is to increase the timeout in permissionless.js. You can do this by changing timeout value in bundlerTransport like so:

const smartAccountClient = createSmartAccountClient({
  account: simpleSmartAccount,
  chain: sepolia, // or whatever chain you are using
  bundlerTransport: http("<bundler_endpoint>", {
    timeout: 30_000 // Custom timeout
  })
})

Getting out of gas errors?

Such errors are thrown when the provided gas limits are not enough to execute the user operation. Usually the gas limits are calculated by the bundler. If you are getting such error, you can try setting up gas limits manually.

const userOp = await smartAccountClient.prepareUserOperation({
    calls,
    callGasLimit: 100_000n,
    verificationGasLimit: 100_000n,
    preVerificationGas: 100_000n,
})