@ledgerhq/live-common/lib-es/bridge/generic-alpaca/signOperation.js

Common ground for the Ledger Live apps

import { Observable } from "rxjs";
import { getAlpacaApi } from "./alpaca";
import { getBridgeApi } from "./bridge";
import { applyMemoToIntent, bigNumberToBigIntDeep, buildOptimisticOperation, extractBalances, transactionToIntent, } from "./utils";
import { FeeNotLoaded } from "@ledgerhq/errors";
import { log } from "@ledgerhq/logs";
import BigNumber from "bignumber.js";
/**
 * Enriches transaction intent with memo and asset information
 */
function enrichTransactionIntent(transactionIntent, transaction, publicKey) {
    // Set sender public key
    transactionIntent.senderPublicKey = publicKey;
    // Apply memo information
    transactionIntent = applyMemoToIntent(transactionIntent, transaction);
    return transactionIntent;
}
/**
 * Sign Transaction with Ledger hardware
 */
export const genericSignOperation = (network, kind) => (signerContext) => ({ account, transaction, deviceId, }) => new Observable(o => {
    async function main() {
        const alpacaApi = getAlpacaApi(account.currency.id, kind);
        const bridgeApi = getBridgeApi(account.currency, network);
        if (!transaction.fees)
            throw new FeeNotLoaded();
        const customFees = bigNumberToBigIntDeep({
            value: transaction.fees ?? new BigNumber(0),
            parameters: {
                gasLimit: transaction.customGasLimit ?? transaction.gasLimit,
                gasPrice: transaction.gasPrice,
                maxFeePerGas: transaction.maxFeePerGas,
                maxPriorityFeePerGas: transaction.maxPriorityFeePerGas,
                additionalFees: transaction.additionalFees,
            },
        });
        if (transaction.useAllAmount) {
            const draftTransaction = {
                mode: transaction.mode,
                recipient: transaction.recipient,
                amount: transaction.amount ?? 0,
                useAllAmount: !!transaction.useAllAmount,
                assetReference: transaction?.assetReference || "",
                assetOwner: transaction?.assetOwner || "",
                subAccountId: transaction.subAccountId || "",
                family: transaction.family,
                feesStrategy: transaction.feesStrategy,
                data: transaction.data,
                type: transaction.type,
            };
            // TODO Remove the call to `validateIntent` https://ledgerhq.atlassian.net/browse/LIVE-22227
            const { amount } = await alpacaApi.validateIntent(transactionToIntent(account, draftTransaction, alpacaApi.computeIntentType), extractBalances(account, bridgeApi.getAssetFromToken), customFees);
            transaction.amount = new BigNumber(amount.toString());
        }
        const signedInfo = await signerContext(deviceId, async (signer) => {
            const derivationPath = account.freshAddressPath;
            const { publicKey } = (await signer.getAddress(derivationPath));
            let transactionIntent = transactionToIntent(account, { ...transaction }, alpacaApi.computeIntentType);
            transactionIntent.senderPublicKey = publicKey;
            // Enrich with memo and asset information
            transactionIntent = enrichTransactionIntent(transactionIntent, transaction, publicKey);
            if (typeof transactionIntent.sequence !== "bigint" || transactionIntent.sequence < 0n) {
                // TODO: should compute it and pass it down to craftTransaction (duplicate call right now)
                const sequenceNumber = await alpacaApi.getNextSequence(transactionIntent.sender);
                transactionIntent.sequence = sequenceNumber;
            }
            /* Craft unsigned blob via Alpaca */
            const { transaction: unsigned } = await alpacaApi.craftTransaction(transactionIntent, customFees);
            /* Notify UI that the device is now showing the tx */
            o.next({ type: "device-signature-requested" });
            /* Sign on Ledger device */
            const txnSig = await signer.signTransaction(derivationPath, unsigned, transaction.recipientDomain);
            return { unsigned, txnSig, publicKey, sequence: transactionIntent.sequence };
        });
        /* If the user cancelled inside signerContext */
        if (!signedInfo)
            return;
        o.next({ type: "device-signature-granted" });
        /* Combine payload + signature for broadcast */
        const combined = await alpacaApi.combine(signedInfo.unsigned, signedInfo.txnSig, signedInfo.publicKey);
        const operation = buildOptimisticOperation(account, transaction, signedInfo.sequence);
        if (!operation.id) {
            log("Generic alpaca", "buildOptimisticOperation", operation);
        }
        // NOTE: we set the transactionSequenceNumber before on the operation
        // now that we create it in craftTransaction, we might need to return it back from craftTransaction also
        o.next({
            type: "signed",
            signedOperation: {
                operation,
                signature: combined,
            },
        });
    }
    main().then(() => o.complete(), e => o.error(e));
});
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