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Fix Difficulty API (REST)

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This commit is contained in:
junderw
2022-08-19 22:00:47 +09:00
parent b2d07d2d44
commit 772765959b
3 changed files with 23 additions and 19 deletions
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36
backend/src/api/difficulty-adjustment.ts
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@@ -6,33 +6,37 @@ class DifficultyAdjustmentApi {
constructor() { }
public getDifficultyAdjustment(): IDifficultyAdjustment {
const ESTIMATE_LAG_BLOCKS = 146; // For first 7.2% of epoch, don't estimate.
const EPOCH_BLOCK_LENGTH = 2016;
const DATime = blocks.getLastDifficultyAdjustmentTime();
const previousRetarget = blocks.getPreviousDifficultyRetarget();
const blockHeight = blocks.getCurrentBlockHeight();
const blocksCache = blocks.getBlocks();
const latestBlock = blocksCache[blocksCache.length - 1];
const now = new Date().getTime() / 1000;
const diff = now - DATime;
const blocksInEpoch = blockHeight % 2016;
const progressPercent = (blocksInEpoch >= 0) ? blocksInEpoch / 2016 * 100 : 100;
const remainingBlocks = 2016 - blocksInEpoch;
const nextRetargetHeight = blockHeight + remainingBlocks;
const nowSeconds = Math.floor(new Date().getTime() / 1000);
const diffSeconds = nowSeconds - DATime;
const blocksInEpoch = (blockHeight >= 0) ? blockHeight % EPOCH_BLOCK_LENGTH : 0;
const progressPercent = (blockHeight >= 0) ? blocksInEpoch / EPOCH_BLOCK_LENGTH * 100 : 100;
const remainingBlocks = EPOCH_BLOCK_LENGTH - blocksInEpoch;
const nextRetargetHeight = (blockHeight >= 0) ? blockHeight + remainingBlocks : 0;
let difficultyChange = 0;
if (remainingBlocks < 1870) {
if (blocksInEpoch > 0) {
difficultyChange = (600 / (diff / blocksInEpoch) - 1) * 100;
}
// Only calculate the estimate once we have 7.2% of blocks in current epoch
if (blocksInEpoch >= ESTIMATE_LAG_BLOCKS) {
difficultyChange = (600 / (diffSeconds / blocksInEpoch) - 1) * 100;
// Max increase is x4 (+300%)
if (difficultyChange > 300) {
difficultyChange = 300;
}
// Max decrease is /4 (-75%)
if (difficultyChange < -75) {
difficultyChange = -75;
}
}
let timeAvgMins = blocksInEpoch && blocksInEpoch > 146 ? diff / blocksInEpoch / 60 : 10;
let timeAvgMins = blocksInEpoch >= ESTIMATE_LAG_BLOCKS ? diffSeconds / blocksInEpoch / 60 : 10;
// Testnet difficulty is set to 1 after 20 minutes of no blocks,
// therefore the time between blocks will always be below 20 minutes (1200s).
@@ -41,14 +45,14 @@ class DifficultyAdjustmentApi {
if (timeAvgMins > 20) {
timeAvgMins = 20;
}
if (now - latestBlock.timestamp + timeAvgMins * 60 > 1200) {
timeOffset = -Math.min(now - latestBlock.timestamp, 1200) * 1000;
if (nowSeconds - latestBlock.timestamp + timeAvgMins * 60 > 1200) {
timeOffset = -Math.min(nowSeconds - latestBlock.timestamp, 1200) * 1000;
}
}
const timeAvg = timeAvgMins * 60 * 1000 ;
const remainingTime = (remainingBlocks * timeAvg) + (now * 1000);
const estimatedRetargetDate = remainingTime + now;
const timeAvg = Math.floor(timeAvgMins * 60 * 1000);
const remainingTime = remainingBlocks * timeAvg;
const estimatedRetargetDate = remainingTime + nowSeconds * 1000;
return {
progressPercent,