@ledgerhq/coin-filecoin/lib-es/logic/account/getBalance.js

Ledger Filecoin Coin integration

import { log } from "@ledgerhq/logs";
import { fetchBalances, fetchERC20TokenBalance } from "../../network/api";
import { convertAddressFilToEth } from "../../network/addresses";
// getBalance returns the native FIL balance plus any ERC-20 token balances for
// contracts passed in tokenContracts. The caller (e.g., the Alpaca generic sync
// layer) is responsible for supplying the tracked token contract addresses.
//
// Zero-balance token entries are included explicitly so callers can distinguish
// "zero" from "not yet synced" (specialized task constraint).
export async function getBalance(address, tokenContracts = []) {
    const balanceResponse = await fetchBalances(address);
    const nativeBalance = {
        value: BigInt(balanceResponse.total_balance),
        asset: { type: "native" },
        // Use ?? "0" fallback before BigInt conversion — locked_balance may be absent
        locked: BigInt(balanceResponse.locked_balance ?? "0"),
    };
    const balances = [nativeBalance];
    if (tokenContracts.length === 0) {
        return balances;
    }
    // Convert the FIL address to its Ethereum-compatible form for ERC-20 queries
    let ethAddr = null;
    try {
        ethAddr = convertAddressFilToEth(address);
    }
    catch {
        log("debug", `[getBalance] address not convertible to eth address: ${address}`);
        // Cannot fetch ERC-20 balances without an ETH-compatible address — return native only
        return balances;
    }
    for (const rawContract of tokenContracts) {
        const contractAddr = rawContract.toLowerCase();
        try {
            const rawBalance = await fetchERC20TokenBalance(ethAddr, contractAddr);
            balances.push({
                value: BigInt(rawBalance),
                asset: { type: "erc20", assetReference: contractAddr },
            });
        }
        catch (e) {
            log("error", `[getBalance] failed to fetch ERC20 balance for ${contractAddr}`, e);
            // Include zero entry even on error — absence would be misread as "not tracked"
            balances.push({
                value: 0n,
                asset: { type: "erc20", assetReference: contractAddr },
            });
        }
    }
    return balances;
}
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