@ledgerhq/coin-algorand
Version:
Ledger Algorand Coin integration
58 lines • 2.45 kB
JavaScript
import { encodeMsgpack, base64ToBytes, makeAssetTransferTxnWithSuggestedParamsFromObject, makePaymentTxnWithSuggestedParamsFromObject, SignedTransaction, } from "algosdk";
import { getTransactionParams } from "./network";
import { extractTokenId } from "./tokens";
export const buildTransactionPayload = async (account, transaction) => {
const { amount, recipient, mode, memo, assetId, subAccountId } = transaction;
const subAccount = subAccountId
? account.subAccounts && account.subAccounts.find(t => t.id === subAccountId)
: null;
const note = memo ? new TextEncoder().encode(memo) : undefined;
const params = await getTransactionParams();
const suggestedParams = {
...params,
firstValid: params.lastRound,
lastValid: params.lastRound + 1000,
genesisHash: base64ToBytes(params.genesisHash),
};
if (subAccount || (assetId && mode === "optIn")) {
const targetAssetId = subAccount && subAccount.type === "TokenAccount"
? extractTokenId(subAccount.token.id)
: assetId
? extractTokenId(assetId)
: "";
if (!targetAssetId) {
throw new Error("Token Asset Id not found");
}
return makeAssetTransferTxnWithSuggestedParamsFromObject({
sender: account.freshAddress,
receiver: recipient,
amount: amount.toNumber(),
assetIndex: Number(targetAssetId),
suggestedParams,
...(note ? { note } : {}),
});
}
return makePaymentTxnWithSuggestedParamsFromObject({
sender: account.freshAddress,
receiver: recipient,
amount: amount.toNumber(),
suggestedParams,
...(note ? { note } : {}),
});
};
export const encodeToSign = (payload) => {
const msgPackEncoded = encodeMsgpack(payload);
return Buffer.from(msgPackEncoded).toString("hex");
};
export const encodeToBroadcast = (payload, signature) => {
// App Algorand returns 66 bytes signatures, including the status word
// ED25519 signature length is exactly 64 bytes
const ED25519_SIGNATURE_LENGTH = 64;
const signedPayload = new SignedTransaction({
sig: signature.subarray(0, ED25519_SIGNATURE_LENGTH),
txn: payload,
});
const msgPackEncoded = encodeMsgpack(signedPayload);
return Buffer.from(msgPackEncoded);
};
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