Skip to content

Latest commit

 

History

History
40 lines (28 loc) · 1.68 KB

error_handling.md

File metadata and controls

40 lines (28 loc) · 1.68 KB
Raw

Error Handling

Use try-catch to get RPC error

You can use js-conflux-sdk with async/await syntax, which means you can use try-catch to catch the error. Normally errors returned from RPC server will include code and message field, and optionally data field will also been returned.

try {
    cfx.getBalance('cfx:aak2rra2njvd77ezwjvx04kkds9fzagfe6ku8scz91');
} catch(e) {
    console.log(e.message);
    console.log(e.code);
    console.log(e.data);
}

The data field maybe a plain text string, also can be a hex encoded string.

console.log(e.data);
// You should connect a node with version 1.1.1 or pass a valid hex value
console.log(e.data);
// 0x5265766572746564
// For hex string you can use hex decode to convert it to plain string
// For example in node.js you can decode like this
Buffer.from(e.data.slice(2), 'hex').toString()

Common Errors

Method not found

Method not found means you send a RPC request, and the request's method is not supported by the server. If you are invoke cfx.sendTransaction() and seen this error, normally because cfx.wallet doesn't have the account tx.from, you should add it to wallet through cfx.addPrivateKey().

0x prefix is missing

0x prefix is missing means the RPC server expect a hex encoded string, but the request params is not passed correctly.

Notes: If you use js-conflux-sdk version 1.5.10 or above, it will use the new CIP37 format address for RPC request parameters. It only work with conflux node version 1.1.1 or above, if you use newer version SDK with 1.1.0 or below you will seen this error 0x prefix is missing. To resolve it you need use a newer version RPC work with it.