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Add recommended fee percentile config (#394)

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andrewtoth 2021-03-18 05:52:46 +00:00 committed by GitHub
parent baa75b77a7
commit ac4588cdab
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4 changed files with 13 additions and 2 deletions
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3
backend/mempool-config.sample.json
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@ -7,7 +7,8 @@
"API_URL_PREFIX": "/api/v1/",
"POLL_RATE_MS": 2000,
"CACHE_DIR": "./cache",
"CLEAR_PROTECTION_MINUTES": 20
"CLEAR_PROTECTION_MINUTES": 20,
"RECOMMENDED_FEE_PERCENTILE": 50
},
"CORE_RPC": {
"HOST": "127.0.0.1",

7
backend/src/api/common.ts
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@ -12,6 +12,13 @@ export class Common {
return medianNr;
}
static percentile(numbers: number[], percentile: number) {
if (percentile === 50) return this.median(numbers);
const index = Math.ceil(numbers.length * (100 - percentile) * 1e-2);
if (index < 0 || index > numbers.length - 1) return 0;
return numbers[index];
}
static getFeesInRange(transactions: TransactionExtended[], rangeLength: number) {
const arr = [transactions[transactions.length - 1].feePerVsize];
const chunk = 1 / (rangeLength - 1);

3
backend/src/api/mempool-blocks.ts
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@ -1,5 +1,6 @@
import { MempoolBlock, TransactionExtended, MempoolBlockWithTransactions } from '../mempool.interfaces';
import { Common } from './common';
import config from '../config';
class MempoolBlocks {
private static DEFAULT_PROJECTED_BLOCKS_AMOUNT = 8;
@ -76,7 +77,7 @@ class MempoolBlocks {
blockVSize: blockVSize,
nTx: transactions.length,
totalFees: transactions.reduce((acc, cur) => acc + cur.fee, 0),
medianFee: Common.median(transactions.map((tx) => tx.feePerVsize)),
medianFee: Common.percentile(transactions.map((tx) => tx.feePerVsize), config.MEMPOOL.RECOMMENDED_FEE_PERCENTILE),
feeRange: Common.getFeesInRange(transactions, rangeLength),
transactionIds: transactions.map((tx) => tx.txid),
};

2
backend/src/config.ts
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@ -10,6 +10,7 @@ interface IConfig {
POLL_RATE_MS: number;
CACHE_DIR: string;
CLEAR_PROTECTION_MINUTES: number;
RECOMMENDED_FEE_PERCENTILE: number;
};
ESPLORA: {
REST_API_URL: string;
@ -64,6 +65,7 @@ const defaults: IConfig = {
'POLL_RATE_MS': 2000,
'CACHE_DIR': './cache',
'CLEAR_PROTECTION_MINUTES': 20,
'RECOMMENDED_FEE_PERCENTILE': 50,
},
'ESPLORA': {
'REST_API_URL': 'http://127.0.0.1:3000',