@ledgerhq/coin-canton/src/common-logic/transaction/craftTransaction.ts

Canton coin integration

import { CryptoCurrency } from "@ledgerhq/ledger-wallet-framework/types";
import BigNumber from "bignumber.js";
import { prepareTransferRequest } from "../../network/gateway";
import type { PrepareTransferRequest, PrepareTransferResponse } from "../../types/gateway";

export async function craftTransaction(
  currency: CryptoCurrency,
  account: {
    address: string;
    nextSequenceNumber?: number;
    publicKey?: string;
  },
  transaction: {
    recipient?: string;
    amount: BigNumber;
    tokenId: string;
    expireInSeconds: number;
    memo?: string;
    pickingStrategy?: PrepareTransferRequest["picking_strategy"];
    instrumentAdmin?: string;
  },
): Promise<{
  nativeTransaction: PrepareTransferResponse["json"];
  serializedTransaction: string;
  hash: string;
}> {
  const params: PrepareTransferRequest = {
    type: "token-transfer-request",
    recipient: transaction.recipient || "",
    amount: transaction.amount.toFixed(),
    execute_before_secs: transaction.expireInSeconds,
    instrument_id: transaction.tokenId,
    ...(transaction.memo ? { reason: transaction.memo } : {}),
    ...(transaction.pickingStrategy ? { picking_strategy: transaction.pickingStrategy } : {}),
    ...(transaction.instrumentAdmin ? { instrument_admin: transaction.instrumentAdmin } : {}),
  };

  const { serialized, json, hash } = await prepareTransferRequest(
    currency,
    account.address,
    params,
  );

  return {
    nativeTransaction: json,
    serializedTransaction: serialized,
    hash,
  };
}