@ledgerhq/hw-app-trx/lib-es/TIP712/index.js

Ledger Hardware Wallet Tron Application API

import { hexBuffer, splitPath } from "../utils";
const CLA = 0xe0;
export const signTIP712HashedMessage = (transport, path, domainSeparatorHex, hashStructMessageHex) => {
    const domainSeparator = hexBuffer(domainSeparatorHex);
    const hashStruct = hexBuffer(hashStructMessageHex);
    const paths = splitPath(path);
    const buffer = Buffer.alloc(1 + paths.length * 4 + 32 + 32, 0);
    let offset = 0;
    buffer[0] = paths.length;
    paths.forEach((element, index) => {
        buffer.writeUint32BE(element, 1 + 4 * index);
    });
    offset = 1 + 4 * paths.length;
    domainSeparator.copy(buffer, offset);
    offset += 32;
    hashStruct.copy(buffer, offset);
    return transport.send(CLA, 0x0c, 0x00, 0x00, buffer).then(response => {
        return response.slice(0, 65).toString("hex");
    });
};
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