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Refactor difficulty API logic

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junderw 2022-08-20 11:24:48 +09:00
parent d700b5f145
commit 87c9f881c0
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GPG key ID: A9273B5AD3E47B45
1 changed files with 6 additions and 4 deletions
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10
backend/src/api/difficulty-adjustment.ts
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@ -23,7 +23,8 @@ export function calcDifficultyAdjustment(
latestBlockTimestamp: number, latestBlockTimestamp: number,
): DifficultyAdjustment { ): DifficultyAdjustment {
const ESTIMATE_LAG_BLOCKS = 146; // For first 7.2% of epoch, don't estimate. 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 diffSeconds = nowSeconds - DATime;
const blocksInEpoch = (blockHeight >= 0) ? blockHeight % EPOCH_BLOCK_LENGTH : 0; const blocksInEpoch = (blockHeight >= 0) ? blockHeight % EPOCH_BLOCK_LENGTH : 0;
@ -32,9 +33,12 @@ export function calcDifficultyAdjustment(
const nextRetargetHeight = (blockHeight >= 0) ? blockHeight + remainingBlocks : 0; const nextRetargetHeight = (blockHeight >= 0) ? blockHeight + remainingBlocks : 0;
let difficultyChange = 0; let difficultyChange = 0;
let timeAvgMins = 10;
// Only calculate the estimate once we have 7.2% of blocks in current epoch // Only calculate the estimate once we have 7.2% of blocks in current epoch
if (blocksInEpoch >= ESTIMATE_LAG_BLOCKS) { 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%) // Max increase is x4 (+300%)
if (difficultyChange > 300) { if (difficultyChange > 300) {
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, // Testnet difficulty is set to 1 after 20 minutes of no blocks,
// therefore the time between blocks will always be below 20 minutes (1200s). // therefore the time between blocks will always be below 20 minutes (1200s).
let timeOffset = 0; let timeOffset = 0;