@fluent-wallet/hw-app-conflux/lib/eip712/transport.js

Ledger Hardware Wallet Conflux Application API

import { splitMessage } from "../utils";
export const EIP712_P1 = {
    complete: 0x00,
    partial: 0x01,
};
export const EIP712_P2 = {
    structName: 0x00,
    structField: 0xff,
    array: 0x0f,
    signFullImplementation: 0x01,
};
/**
 * Sends EIP712 payload to device, chunking if necessary.
 * Splits payloads larger than 255 bytes into multiple APDUs.
 */
export async function sendEIP712Payload(transport, cla, ins, p2, payload) {
    if (payload.length === 0) {
        await transport.send(cla, ins, EIP712_P1.complete, p2, payload);
        return;
    }
    const chunks = splitMessage(payload, 0xff);
    for (let i = 0; i < chunks.length; i++) {
        const isLast = i === chunks.length - 1;
        const p1 = isLast ? EIP712_P1.complete : EIP712_P1.partial;
        await transport.send(cla, ins, p1, p2, chunks[i]);
    }
}
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