@ledgerhq/live-common
Version:
Common ground for the Ledger Live apps
48 lines • 2.51 kB
JavaScript
import { Observable } from "rxjs";
import { getAlpacaApi } from "./alpaca";
import { buildOptimisticOperation } from "./utils";
import { log } from "@ledgerhq/logs";
import BigNumber from "bignumber.js";
/**
* Sign Transaction with Ledger hardware
*/
export const genericSignRawOperation = (_network, kind) => (signerContext) => ({ account, transaction, deviceId, }) => new Observable(o => {
async function main() {
const alpacaApi = getAlpacaApi(account.currency.id, kind);
const signedInfo = await signerContext(deviceId, async (signer) => {
const derivationPath = account.freshAddressPath;
const { publicKey } = (await signer.getAddress(derivationPath));
const sender = account.freshAddress;
// TODO: should compute it and pass it down to craftTransaction (duplicate call right now)
const sequenceNumber = await alpacaApi.getNextSequence(sender);
/* Craft unsigned blob via Alpaca */
const { transaction: unsigned } = await alpacaApi.craftRawTransaction(transaction, sender, publicKey, sequenceNumber);
/* 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);
return { unsigned, txnSig, publicKey, sequence: sequenceNumber };
});
/* 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, { family: account.currency.family, amount: new BigNumber(0), recipient: "" }, 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));
});
//# sourceMappingURL=signRawOperation.js.map