@ledgerhq/coin-stacks/lib-es/bridge/estimateMaxSpendable.js

Ledger Stacks Coin integration

import { getMainAccount } from "@ledgerhq/coin-framework/account/index";
import { getAbandonSeedAddress } from "@ledgerhq/cryptoassets/abandonseed";
import { estimateTransaction, estimateTransactionByteLength, makeUnsignedSTXTokenTransfer, } from "@stacks/transactions";
import BigNumber from "bignumber.js";
import invariant from "invariant";
import { StacksNetwork } from "../network/api.types";
import { createTransaction } from "./createTransaction";
export const estimateMaxSpendable = async ({ account, parentAccount, transaction, }) => {
    const mainAccount = getMainAccount(account, parentAccount);
    const { spendableBalance, xpub } = mainAccount;
    invariant(xpub, "xpub is required");
    const dummyTx = {
        ...createTransaction(account),
        ...transaction,
        recipient: getAbandonSeedAddress(mainAccount.currency.id),
        useAllAmount: true,
    };
    // Compute fees
    const { recipient, anchorMode, memo, amount } = dummyTx;
    const network = StacksNetwork[dummyTx.network] || StacksNetwork["mainnet"];
    const options = {
        recipient,
        anchorMode,
        memo,
        network,
        publicKey: xpub,
        amount: amount.toFixed(),
    };
    const tx = await makeUnsignedSTXTokenTransfer(options);
    const [feeEst] = await estimateTransaction(tx.payload, estimateTransactionByteLength(tx), network);
    const diff = spendableBalance.minus(new BigNumber(feeEst.fee));
    return diff.gte(0) ? diff : new BigNumber(0);
};
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