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Project early difficulty from sliding window

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This commit is contained in:
Mononaut
2024-02-11 22:50:34 +00:00
parent cc2f42e814
commit 000524691a
10 changed files with 93 additions and 19 deletions
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53
backend/src/__tests__/api/difficulty-adjustment.test.ts
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@@ -11,9 +11,35 @@ describe('Mempool Difficulty Adjustment', () => {
};
const vectors = [
[ // Vector 1
[ // Vector 1 (normal adjustment)
[ // Inputs
dt('2024-02-02T15:42:06.000Z'), // Last DA time (in seconds)
dt('2024-02-08T14:43:05.000Z'), // timestamp of 504 blocks ago (in seconds)
dt('2024-02-11T22:43:01.000Z'), // Current time (now) (in seconds)
830027, // Current block height
7.333505241141637, // Previous retarget % (Passed through)
'mainnet', // Network (if testnet, next value is non-zero)
0, // Latest block timestamp in seconds (only used if difficulty already locked in)
],
{ // Expected Result
progressPercent: 71.97420634920636,
difficultyChange: 8.512745140778843,
estimatedRetargetDate: 1708004001715,
remainingBlocks: 565,
remainingTime: 312620715,
previousRetarget: 7.333505241141637,
previousTime: 1706888526,
nextRetargetHeight: 830592,
timeAvg: 553311,
adjustedTimeAvg: 553311,
timeOffset: 0,
expectedBlocks: 1338.0916666666667,
},
],
[ // Vector 2 (within quarter-epoch overlap)
[ // Inputs
dt('2022-08-18T11:07:00.000Z'), // Last DA time (in seconds)
dt('2022-08-16T03:16:54.000Z'), // timestamp of 504 blocks ago (in seconds)
dt('2022-08-19T14:03:53.000Z'), // Current time (now) (in seconds)
750134, // Current block height
0.6280047707459726, // Previous retarget % (Passed through)
@@ -22,21 +48,23 @@ describe('Mempool Difficulty Adjustment', () => {
],
{ // Expected Result
progressPercent: 9.027777777777777,
difficultyChange: 13.180707740199772,
estimatedRetargetDate: 1661895424692,
difficultyChange: 1.0420538959004633,
estimatedRetargetDate: 1662009048328,
remainingBlocks: 1834,
remainingTime: 977591692,
remainingTime: 1091215328,
previousRetarget: 0.6280047707459726,
previousTime: 1660820820,
nextRetargetHeight: 751968,
timeAvg: 533038,
adjustedTimeAvg: 594992,
timeOffset: 0,
expectedBlocks: 161.68833333333333,
},
],
[ // Vector 2 (testnet)
[ // Vector 3 (testnet)
[ // Inputs
dt('2022-08-18T11:07:00.000Z'), // Last DA time (in seconds)
dt('2022-08-16T03:16:54.000Z'), // timestamp of 504 blocks ago (in seconds)
dt('2022-08-19T14:03:53.000Z'), // Current time (now) (in seconds)
750134, // Current block height
0.6280047707459726, // Previous retarget % (Passed through)
@@ -45,22 +73,24 @@ describe('Mempool Difficulty Adjustment', () => {
],
{ // Expected Result is same other than timeOffset
progressPercent: 9.027777777777777,
difficultyChange: 13.180707740199772,
estimatedRetargetDate: 1661895424692,
difficultyChange: 1.0420538959004633,
estimatedRetargetDate: 1662009048328,
remainingBlocks: 1834,
remainingTime: 977591692,
remainingTime: 1091215328,
previousTime: 1660820820,
previousRetarget: 0.6280047707459726,
nextRetargetHeight: 751968,
timeAvg: 533038,
adjustedTimeAvg: 594992,
timeOffset: -667000, // 11 min 7 seconds since last block (testnet only)
// If we add time avg to abs(timeOffset) it makes exactly 1200000 ms, or 20 minutes
expectedBlocks: 161.68833333333333,
},
],
[ // Vector 3 (mainnet lock-in (epoch ending 788255))
[ // Vector 4 (mainnet lock-in (epoch ending 788255))
[ // Inputs
dt('2023-04-20T09:57:33.000Z'), // Last DA time (in seconds)
dt('2022-08-16T03:16:54.000Z'), // timestamp of 504 blocks ago (in seconds)
dt('2023-05-04T14:54:09.000Z'), // Current time (now) (in seconds)
788255, // Current block height
1.7220298879531821, // Previous retarget % (Passed through)
@@ -77,16 +107,17 @@ describe('Mempool Difficulty Adjustment', () => {
previousTime: 1681984653,
nextRetargetHeight: 788256,
timeAvg: 609129,
adjustedTimeAvg: 609129,
timeOffset: 0,
expectedBlocks: 2045.66,
},
],
] as [[number, number, number, number, string, number], DifficultyAdjustment][];
] as [[number, number, number, number, number, string, number], DifficultyAdjustment][];
for (const vector of vectors) {
const result = calcDifficultyAdjustment(...vector[0]);
// previousRetarget is passed through untouched
expect(result.previousRetarget).toStrictEqual(vector[0][3]);
expect(result.previousRetarget).toStrictEqual(vector[0][4]);
expect(result).toStrictEqual(vector[1]);
}
});