Polkadot tx-wrapper 离线签名

Question

ExtrinsicPayload 到底是做什么的？我想复制逻辑，但缺少一些东西。

import {
    getRegistry
} from '@substrate/txwrapper-polkadot';

const registry = getRegistry({
        chainName: 'Polkadot',
        specName,
        specVersion,
        metadataRpc,
    });

const extrinsicPayload = registry.createType('ExtrinsicPayload', unsigned, {version: unsigned.version});
const extrinsicPayloadU8a = extrinsicPayload.toU8a({method: true})
const actualPayload = extrinsicPayloadU8a.length > 256 ? registry.hash(extrinsicPayloadU8a) : extrinsicPayloadU8a;

const s1 = u8aToHex(alice.sign(actualPayload));
console.log("s1", s1, s1.length);
const s2 = extrinsicPayload.sign(alice).signature;
console.log("s2", s2, s2.length);

s1 和 s2 应该有相同的长度，但他们没有。什么原因？

Answer 1

你也应该将 {"withType": true} 传递给 sign 方法。

const s1 = u8aToHex(alice.sign(actualPayload, {"withType": true}));

sr25519使用随机签名，所以结果不会相同，但长度应该相同。

Polkadot tx-wrapper 离线签名

Polkadot tx-wrapper offline signing

blockchain

polkadot

polkadot-js