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add block.xyz augur fee estimator

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This commit is contained in:
Liz Lightning
2025-11-25 10:32:33 +02:00
committed by GitHub
parent 71cb5852b3
commit 6452bf8184
3 changed files with 71 additions and 0 deletions
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src/main/java/com/sparrowwallet/sparrow/net/FeeRatesSource.java
+56
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@@ -3,6 +3,7 @@ package com.sparrowwallet.sparrow.net;
import com.sparrowwallet.drongo.Network;
import com.sparrowwallet.drongo.Utils;
import com.sparrowwallet.drongo.protocol.Sha256Hash;
import com.sparrowwallet.drongo.protocol.Transaction;
import com.sparrowwallet.drongo.wallet.BlockTransaction;
import com.sparrowwallet.drongo.wallet.BlockTransactionHash;
import com.sparrowwallet.sparrow.AppServices;
@@ -71,6 +72,30 @@ public enum FeeRatesSource {
return network == Network.MAINNET || network == Network.TESTNET || network == Network.TESTNET4 || network == Network.SIGNET;
}
},
BLOCK_XYZ("block.xyz", true) {
/*
https://engineering.block.xyz/blog/augur-an-open-source-bitcoin-fee-estimation-library
*/
@Override
public Map<Integer, Double> getBlockTargetFeeRates(Map<Integer, Double> defaultblockTargetFeeRates) {
String url = "https://pricing.bitcoin.block.xyz/fees";
return getThreeTierFeeRates(this, defaultblockTargetFeeRates, url);
}
@Override
public boolean supportsNetwork(Network network) {
return network == Network.MAINNET;
}
@Override
protected ThreeTierRates getThreeTierRates(String url, HttpClientService httpClientService) throws Exception {
BlockXyzRates rates = httpClientService.requestJson(url, BlockXyzRates.class, null);
if(rates.estimates == null) {
throw new Exception("Invalid response from " + url);
}
return rates.getThreeTierRates();
}
},
BITCOINFEES_EARN_COM("bitcoinfees.earn.com", true) {
@Override
public Map<Integer, Double> getBlockTargetFeeRates(Map<Integer, Double> defaultblockTargetFeeRates) {
@@ -343,6 +368,37 @@ public enum FeeRatesSource {
}
}
private record BlockXyzRates(Map<String, BlockXyzEstimate> estimates) {
public ThreeTierRates getThreeTierRates() {
// see https://engineering.block.xyz/blog/augur-an-open-source-bitcoin-fee-estimation-library
//
// fastestFee: 95% confidence at 3 blocks
// halfHourFee: 80% confidence at 3 blocks
// hourFee: 80% confidence at 6 blocks
// minimumFee: 80% confidence at 144 blocks
Double fastestFee = getFeeRate("3", "0.95");
Double halfHourFee = getFeeRate("3", "0.80");
Double hourFee = getFeeRate("6", "0.80");
Double minimumFee = getFeeRate("144", "0.80");
return new ThreeTierRates(fastestFee, halfHourFee, hourFee, minimumFee);
}
private Double getFeeRate(String blocks, String probability) {
BlockXyzEstimate estimate = estimates.get(blocks);
if(estimate != null && estimate.probabilities != null) {
BlockXyzFeeRate feeRate = estimate.probabilities.get(probability);
if(feeRate != null) {
return feeRate.fee_rate;
}
}
return Transaction.DEFAULT_MIN_RELAY_FEE;
}
}
private record BlockXyzEstimate(Map<String, BlockXyzFeeRate> probabilities) {}
private record BlockXyzFeeRate(Double fee_rate) {}
protected record MempoolBlock(Integer nTx, Double medianFee) {}
protected record MempoolBlockSummary(String id, Integer height, Long timestamp, Integer tx_count, Integer weight, MempoolBlockSummaryExtras extras) {