@ledgerhq/coin-canton/lib-es/bridge/prepareTransaction.js

Canton coin integration

import BigNumber from "bignumber.js";
import { estimateFees } from "../common-logic";
import coinConfig from "../config";
import { getCalTokensCached } from "../network/gateway";
import { updateTransaction } from "./updateTransaction";
export const prepareTransaction = async (account, transaction) => {
    const amount = transaction.amount || BigNumber(0);
    const fee = BigNumber((await estimateFees(account.currency, BigInt(amount.toFixed()))).toString());
    let tokenId = transaction.tokenId;
    let instrumentAdmin;
    if (transaction.subAccountId && account.subAccounts) {
        const subAccount = account.subAccounts.find((sub) => sub.type === "TokenAccount" && sub.id === transaction.subAccountId);
        if (subAccount) {
            const calTokens = await getCalTokensCached(account.currency);
            tokenId = calTokens.get(subAccount.token.id) || subAccount.token.name;
            instrumentAdmin = subAccount.token.contractAddress;
        }
    }
    // Default to native instrument if no tokenId set
    if (!tokenId) {
        tokenId = coinConfig.getCoinConfig(account.currency.id).nativeInstrumentId;
    }
    return updateTransaction(transaction, {
        fee,
        tokenId,
        ...(instrumentAdmin ? { instrumentAdmin } : {}),
    });
};
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