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Merge pull request #3316 from mempool/mononaut/projected-median-fee

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New median fee calculation for mempool blocks
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softsimon 2023-03-28 17:22:20 +09:00 committed by GitHub
commit 5977251a20
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1 changed files with 11 additions and 22 deletions
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33
backend/src/api/mempool-blocks.ts
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@ -59,7 +59,7 @@ class MempoolBlocks {
// Loop through and traverse all ancestors and sum up all the sizes + fees
// Pass down size + fee to all unconfirmed children
let sizes = 0;
memPoolArray.forEach((tx, i) => {
memPoolArray.forEach((tx) => {
sizes += tx.weight;
if (sizes > 4000000 * 8) {
return;
@ -74,7 +74,7 @@ class MempoolBlocks {
const time = end - start;
logger.debug('Mempool blocks calculated in ' + time / 1000 + ' seconds');
const blocks = this.calculateMempoolBlocks(memPoolArray, this.mempoolBlocks);
const blocks = this.calculateMempoolBlocks(memPoolArray);
if (saveResults) {
const deltas = this.calculateMempoolDeltas(this.mempoolBlocks, blocks);
@ -85,26 +85,23 @@ class MempoolBlocks {
return blocks;
}
private calculateMempoolBlocks(transactionsSorted: TransactionExtended[], prevBlocks: MempoolBlockWithTransactions[]): MempoolBlockWithTransactions[] {
private calculateMempoolBlocks(transactionsSorted: TransactionExtended[]): MempoolBlockWithTransactions[] {
const mempoolBlocks: MempoolBlockWithTransactions[] = [];
let blockWeight = 0;
let blockSize = 0;
let transactions: TransactionExtended[] = [];
transactionsSorted.forEach((tx) => {
if (blockWeight + tx.weight <= config.MEMPOOL.BLOCK_WEIGHT_UNITS
|| mempoolBlocks.length === config.MEMPOOL.MEMPOOL_BLOCKS_AMOUNT - 1) {
blockWeight += tx.weight;
blockSize += tx.size;
transactions.push(tx);
} else {
mempoolBlocks.push(this.dataToMempoolBlocks(transactions, mempoolBlocks.length));
mempoolBlocks.push(this.dataToMempoolBlocks(transactions));
blockWeight = tx.weight;
blockSize = tx.size;
transactions = [tx];
}
});
if (transactions.length) {
mempoolBlocks.push(this.dataToMempoolBlocks(transactions, mempoolBlocks.length));
mempoolBlocks.push(this.dataToMempoolBlocks(transactions));
}
return mempoolBlocks;
@ -298,10 +295,10 @@ class MempoolBlocks {
});
// unpack the condensed blocks into proper mempool blocks
const mempoolBlocks = blocks.map((transactions, blockIndex) => {
const mempoolBlocks = blocks.map((transactions) => {
return this.dataToMempoolBlocks(transactions.map(tx => {
return mempool[tx.txid] || null;
}).filter(tx => !!tx), blockIndex);
}).filter(tx => !!tx));
});
if (saveResults) {
@ -313,7 +310,7 @@ class MempoolBlocks {
return mempoolBlocks;
}
private dataToMempoolBlocks(transactions: TransactionExtended[], blocksIndex: number): MempoolBlockWithTransactions {
private dataToMempoolBlocks(transactions: TransactionExtended[]): MempoolBlockWithTransactions {
let totalSize = 0;
let totalWeight = 0;
const fitTransactions: TransactionExtended[] = [];
@ -324,22 +321,14 @@ class MempoolBlocks {
fitTransactions.push(tx);
}
});
let rangeLength = 4;
if (blocksIndex === 0) {
rangeLength = 8;
}
if (transactions.length > 4000) {
rangeLength = 6;
} else if (transactions.length > 10000) {
rangeLength = 8;
}
const feeStats = Common.calcEffectiveFeeStatistics(transactions);
return {
blockSize: totalSize,
blockVSize: totalWeight / 4,
nTx: transactions.length,
totalFees: transactions.reduce((acc, cur) => acc + cur.fee, 0),
medianFee: Common.percentile(transactions.map((tx) => tx.effectiveFeePerVsize), config.MEMPOOL.RECOMMENDED_FEE_PERCENTILE),
feeRange: Common.getFeesInRange(transactions, rangeLength),
medianFee: feeStats.medianFee, // Common.percentile(transactions.map((tx) => tx.effectiveFeePerVsize), config.MEMPOOL.RECOMMENDED_FEE_PERCENTILE),
feeRange: feeStats.feeRange, //Common.getFeesInRange(transactions, rangeLength),
transactionIds: transactions.map((tx) => tx.txid),
transactions: fitTransactions.map((tx) => Common.stripTransaction(tx)),
};