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Improved empty mempool as well as medium and low fee estimations.

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refs #65
This commit is contained in:
softsimon
2020-10-05 11:42:54 +07:00
parent 20477aaac0
commit 193c8ab74c
2 changed files with 38 additions and 18 deletions
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24
backend/src/api/fee-api.ts
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@@ -1,4 +1,5 @@
const config = require('../../mempool-config.json');
import { MempoolBlock } from '../interfaces';
import projectedBlocks from './mempool-blocks';
class FeeApi {
@@ -8,6 +9,7 @@ class FeeApi {
public getRecommendedFee() {
const pBlocks = projectedBlocks.getMempoolBlocks();
if (!pBlocks.length) {
return {
'fastestFee': this.defaultFee,
@@ -15,14 +17,10 @@ class FeeApi {
'hourFee': this.defaultFee,
};
}
let firstMedianFee = Math.ceil(pBlocks[0].medianFee);
if (pBlocks.length === 1 && pBlocks[0].blockVSize <= 500000) {
firstMedianFee = this.defaultFee;
}
const secondMedianFee = pBlocks[1] ? Math.ceil(pBlocks[1].medianFee) : this.defaultFee;
const thirdMedianFee = pBlocks[2] ? Math.ceil(pBlocks[2].medianFee) : this.defaultFee;
const firstMedianFee = this.optimizeMedianFee(pBlocks[0]);
const secondMedianFee = pBlocks[1] ? this.optimizeMedianFee(pBlocks[1], firstMedianFee) : this.defaultFee;
const thirdMedianFee = pBlocks[2] ? this.optimizeMedianFee(pBlocks[2], secondMedianFee) : this.defaultFee;
return {
'fastestFee': firstMedianFee,
@@ -30,6 +28,18 @@ class FeeApi {
'hourFee': thirdMedianFee,
};
}
private optimizeMedianFee(pBlock: MempoolBlock, previousFee?: number): number {
const useFee = previousFee ? (pBlock.medianFee + previousFee / 2) : pBlock.medianFee;
if (pBlock.blockVSize <= 500000) {
return this.defaultFee;
}
if (pBlock.blockVSize <= 950000) {
const multiplier = (pBlock.blockVSize - 500000) / 500000;
return Math.max(Math.round(useFee * multiplier), this.defaultFee);
}
return Math.round(useFee);
}
}
export default new FeeApi();