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prefer using libsecp256k1 to derive public keys from private

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This commit is contained in:
Craig Raw 2022-07-12 10:43:20 +02:00
parent d05ec39df7
commit cd1e21ebaa
2 changed files with 12 additions and 2 deletions
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10
src/main/java/com/sparrowwallet/drongo/crypto/ECKey.java
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@ -275,6 +275,16 @@ public class ECKey {
* use {@code new BigInteger(1, bytes);}
*/
public static ECPoint publicPointFromPrivate(BigInteger privKey) {
if(Secp256k1Context.isEnabled()) {
try {
byte[] pubKeyBytes = NativeSecp256k1.computePubkey(Utils.bigIntegerToBytes(privKey, 32), false);
LazyECPoint lazyECPoint = new LazyECPoint(CURVE.getCurve(), pubKeyBytes);
return lazyECPoint.get();
} catch(NativeSecp256k1Util.AssertFailException e) {
log.error("Error computing public key from private", e);
}
}
/*
* TODO: FixedPointCombMultiplier currently doesn't support scalars longer than the group order,
* but that could change in future versions.

4
src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java
View file

@ -924,8 +924,8 @@ public class Wallet extends Persistable implements Comparable<Wallet> {
* @return the number of weight units (WU)
*/
public int getInputWeightUnits() {
//Estimate assuming an input spending from a fresh receive node - it does not matter this node has no real utxos
WalletNode receiveNode = getFreshNode(KeyPurpose.RECEIVE);
//Estimate assuming an input spending from the parent receive node - it does not matter this node has no real utxos
WalletNode receiveNode = new WalletNode(this, KeyPurpose.RECEIVE);
Transaction transaction = new Transaction();
TransactionOutput prevTxOut = transaction.addOutput(1L, receiveNode.getAddress());