68 lines
2.2 KiB
Go
68 lines
2.2 KiB
Go
package block
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import (
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"git.gammaspectra.live/P2Pool/p2pool-observer/monero"
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"lukechampine.com/uint128"
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"math"
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)
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func GetBaseReward(alreadyGeneratedCounts uint64) uint64 {
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result := (^alreadyGeneratedCounts) >> 19
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if result < monero.TailEmissionReward {
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return monero.TailEmissionReward
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}
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return result
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}
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func GetBlockReward(medianWeight, currentBlockWeight, alreadyGeneratedCoins uint64, version uint8) (reward uint64) {
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const DIFFICULTY_TARGET_V1 = 60 // seconds - before first fork
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const DIFFICULTY_TARGET_V2 = 120 // seconds
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const EMISSION_SPEED_FACTOR_PER_MINUTE = 20
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const FINAL_SUBSIDY_PER_MINUTE = 300000000000 // 3 * pow(10, 11)
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const MONEY_SUPPLY = math.MaxUint64
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const CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1 = 20000 //size of block (bytes) after which reward for block calculated using block size - before first fork
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const CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 = 60000 //size of block (bytes) after which reward for block calculated using block size
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const CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5 = 300000 //size of block (bytes) after which reward for block calculated using block size - second change, from v5
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target := uint64(DIFFICULTY_TARGET_V2)
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if version < 2 {
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target = DIFFICULTY_TARGET_V1
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}
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targetMinutes := target / 60
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emissionSpeedFactor := EMISSION_SPEED_FACTOR_PER_MINUTE - (targetMinutes - 1)
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baseReward := (MONEY_SUPPLY - alreadyGeneratedCoins) >> emissionSpeedFactor
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if baseReward < (FINAL_SUBSIDY_PER_MINUTE * targetMinutes) {
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baseReward = FINAL_SUBSIDY_PER_MINUTE * targetMinutes
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}
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fullRewardZone := func(version uint8) uint64 {
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if version < 2 {
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return CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1
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}
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if version < 5 {
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return CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2
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}
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return CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5
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}(version)
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//make it soft
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if medianWeight < fullRewardZone {
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medianWeight = fullRewardZone
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}
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if currentBlockWeight <= medianWeight {
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return baseReward
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}
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if currentBlockWeight > 2*medianWeight {
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//Block cumulative weight is too big
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return 0
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}
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product := uint128.From64(baseReward).Mul64(2*medianWeight - currentBlockWeight)
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return product.Div64(medianWeight).Div64(medianWeight).Lo
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}
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