mirrors/mempool
1
0
Fork 0
mirror of https://github.com/mempool/mempool.git synced 2025-02-23 06:35:15 +01:00
Code Issues Projects Releases Wiki Activity

Refactor difficulty API logic

Browse source
This commit is contained in:
junderw 2022-08-20 11:24:48 +09:00
parent d700b5f145
commit 87c9f881c0
No known key found for this signature in database
GPG key ID: A9273B5AD3E47B45
1 changed files with 6 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
backend/src/api/difficulty-adjustment.ts
View file

@ -23,7 +23,8 @@ export function calcDifficultyAdjustment(
latestBlockTimestamp: number,
): DifficultyAdjustment {
const ESTIMATE_LAG_BLOCKS = 146; // For first 7.2% of epoch, don't estimate.
const EPOCH_BLOCK_LENGTH = 2016;
const EPOCH_BLOCK_LENGTH = 2016; // Bitcoin mainnet
const BLOCK_SECONDS_TARGET = 600; // Bitcoin mainnet
const diffSeconds = nowSeconds - DATime;
const blocksInEpoch = (blockHeight >= 0) ? blockHeight % EPOCH_BLOCK_LENGTH : 0;
@ -32,9 +33,12 @@ export function calcDifficultyAdjustment(
const nextRetargetHeight = (blockHeight >= 0) ? blockHeight + remainingBlocks : 0;
let difficultyChange = 0;
let timeAvgMins = 10;
// 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;
const secondsPerBlock = diffSeconds / blocksInEpoch;
timeAvgMins = secondsPerBlock / 60;
difficultyChange = (BLOCK_SECONDS_TARGET / secondsPerBlock - 1) * 100;
// Max increase is x4 (+300%)
if (difficultyChange > 300) {
difficultyChange = 300;
@ -45,8 +49,6 @@ export function calcDifficultyAdjustment(
}
}
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).
let timeOffset = 0;