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mainnetparams.go
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mainnetparams.go
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// Copyright (c) 2014-2016 The btcsuite developers
// Copyright (c) 2015-2023 The Decred developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package chaincfg
import (
"math/big"
"time"
"github.com/decred/dcrd/chaincfg/chainhash"
"github.com/decred/dcrd/wire"
)
// MainNetParams returns the network parameters for the main Decred network.
func MainNetParams() *Params {
// mainPowLimit is the highest proof of work value a Decred block can have
// for the main network. It is the value 2^224 - 1.
mainPowLimit := new(big.Int).Sub(new(big.Int).Lsh(bigOne, 224), bigOne)
// mainNetPowLimitBits is the main network proof of work limit in its
// compact representation.
//
// Note that due to the limited precision of the compact representation,
// this is not exactly equal to the pow limit. It is the value:
//
// 0x00000000ffff0000000000000000000000000000000000000000000000000000
const mainPowLimitBits = 0x1d00ffff // 486604799
// genesisBlock defines the genesis block of the block chain which serves as
// the public transaction ledger for the main network.
//
// The genesis block for Decred mainnet, testnet, and simnet are not
// evaluated for proof of work. The only values that are ever used elsewhere
// in the blockchain from it are:
// (1) The genesis block hash is used as the PrevBlock.
// (2) The difficulty starts off at the value given by Bits.
// (3) The stake difficulty starts off at the value given by SBits.
// (4) The timestamp, which guides when blocks can be built on top of it
// and what the initial difficulty calculations come out to be.
//
// The genesis block is valid by definition and none of the fields within it
// are validated for correctness.
genesisBlock := wire.MsgBlock{
Header: wire.BlockHeader{
Version: 1,
PrevBlock: chainhash.Hash{}, // All zero.
// MerkleRoot: Calculated below.
StakeRoot: chainhash.Hash{},
Timestamp: time.Unix(1454954400, 0), // Mon, 08 Feb 2016 18:00:00 GMT
Bits: 0x1b01ffff, // Difficulty 32767
SBits: 2 * 1e8, // 2 Coin
Nonce: 0x00000000,
StakeVersion: 0,
},
Transactions: []*wire.MsgTx{{
SerType: wire.TxSerializeFull,
Version: 1,
TxIn: []*wire.TxIn{{
// Fully null.
PreviousOutPoint: wire.OutPoint{
Hash: chainhash.Hash{},
Index: 0xffffffff,
Tree: 0,
},
SignatureScript: hexDecode("0000"),
Sequence: 0xffffffff,
BlockHeight: wire.NullBlockHeight,
BlockIndex: wire.NullBlockIndex,
ValueIn: wire.NullValueIn,
}},
TxOut: []*wire.TxOut{{
Version: 0x0000,
Value: 0x00000000,
PkScript: hexDecode("801679e98561ada96caec2949a5d41c4cab3851e" +
"b740d951c10ecbcf265c1fd9"),
}},
LockTime: 0,
Expiry: 0,
}},
}
genesisBlock.Header.MerkleRoot = genesisBlock.Transactions[0].TxHashFull()
return &Params{
Name: "mainnet",
Net: wire.MainNet,
DefaultPort: "9108",
DNSSeeds: []DNSSeed{
{"mainnet-seed.decred.mindcry.org", true},
{"mainnet-seed.decred.netpurgatory.com", true},
{"mainnet-seed.decred.org", true},
},
// Chain parameters
GenesisBlock: &genesisBlock,
GenesisHash: genesisBlock.BlockHash(),
PowLimit: mainPowLimit,
PowLimitBits: mainPowLimitBits,
ReduceMinDifficulty: false,
MinDiffReductionTime: 0, // Does not apply since ReduceMinDifficulty false
GenerateSupported: false,
MaximumBlockSizes: []int{393216},
MaxTxSize: 393216,
TargetTimePerBlock: time.Minute * 5,
// Version 1 difficulty algorithm (EMA + BLAKE256) parameters.
WorkDiffAlpha: 1,
WorkDiffWindowSize: 144,
WorkDiffWindows: 20,
TargetTimespan: time.Minute * 5 * 144, // TimePerBlock * WindowSize
RetargetAdjustmentFactor: 4,
// Version 2 difficulty algorithm (ASERT + BLAKE3) parameters.
WorkDiffV2Blake3StartBits: 0x1b00a5a6,
WorkDiffV2HalfLifeSecs: 43200, // 144 * TimePerBlock (12 hours)
// Subsidy parameters.
BaseSubsidy: 3119582664, // 21m
MulSubsidy: 100,
DivSubsidy: 101,
SubsidyReductionInterval: 6144,
WorkRewardProportion: 6,
WorkRewardProportionV2: 1,
StakeRewardProportion: 3,
StakeRewardProportionV2: 8,
BlockTaxProportion: 1,
// AssumeValid is the hash of a block that has been externally verified
// to be valid. It allows several validation checks to be skipped for
// blocks that are both an ancestor of the assumed valid block and an
// ancestor of the best header. It is also used to determine the old
// forks rejection checkpoint. This is intended to be updated
// periodically with new releases.
//
// Block 00000000000000001251efb83ad1a5c71351b50fe9195f009cf0bf5a7cd99d52
// Height: 606000
AssumeValid: *newHashFromStr("00000000000000001251efb83ad1a5c71351b50fe9195f009cf0bf5a7cd99d52"),
// MinKnownChainWork is the minimum amount of known total work for the
// chain at a given point in time. This is intended to be updated
// periodically with new releases.
//
// Block 00000000000000001251efb83ad1a5c71351b50fe9195f009cf0bf5a7cd99d52
// Height: 606000
MinKnownChainWork: hexToBigInt("0000000000000000000000000000000000000000001d987ec2c7f4bc1199489e"),
// The miner confirmation window is defined as:
// target proof of work timespan / target proof of work spacing
RuleChangeActivationQuorum: 4032, // 10 % of RuleChangeActivationInterval * TicketsPerBlock
RuleChangeActivationMultiplier: 3, // 75%
RuleChangeActivationDivisor: 4,
RuleChangeActivationInterval: 2016 * 4, // 4 weeks
Deployments: map[uint32][]ConsensusDeployment{
4: {{
Vote: Vote{
Id: VoteIDSDiffAlgorithm,
Description: "Change stake difficulty algorithm as defined in DCP0001",
Mask: 0x0006, // Bits 1 and 2
Choices: []Choice{{
Id: "abstain",
Description: "abstain voting for change",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "keep the existing algorithm",
Bits: 0x0002, // Bit 1
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "change to the new algorithm",
Bits: 0x0004, // Bit 2
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1493164800, // Apr 26th, 2017
ExpireTime: 1524700800, // Apr 26th, 2018
}, {
Vote: Vote{
Id: VoteIDLNSupport,
Description: "Request developers begin work on Lightning Network (LN) integration",
Mask: 0x0018, // Bits 3 and 4
Choices: []Choice{{
Id: "abstain",
Description: "abstain from voting",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "no, do not work on integrating LN support",
Bits: 0x0008, // Bit 3
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "yes, begin work on integrating LN support",
Bits: 0x0010, // Bit 4
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1493164800, // Apr 26th, 2017
ExpireTime: 1508976000, // Oct 26th, 2017
}},
5: {{
Vote: Vote{
Id: VoteIDLNFeatures,
Description: "Enable features defined in DCP0002 and DCP0003 necessary to support Lightning Network (LN)",
Mask: 0x0006, // Bits 1 and 2
Choices: []Choice{{
Id: "abstain",
Description: "abstain voting for change",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "keep the existing consensus rules",
Bits: 0x0002, // Bit 1
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "change to the new consensus rules",
Bits: 0x0004, // Bit 2
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1505260800, // Sep 13th, 2017
ExpireTime: 1536796800, // Sep 13th, 2018
}},
6: {{
Vote: Vote{
Id: VoteIDFixLNSeqLocks,
Description: "Modify sequence lock handling as defined in DCP0004",
Mask: 0x0006, // Bits 1 and 2
Choices: []Choice{{
Id: "abstain",
Description: "abstain voting for change",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "keep the existing consensus rules",
Bits: 0x0002, // Bit 1
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "change to the new consensus rules",
Bits: 0x0004, // Bit 2
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1548633600, // Jan 28th, 2019
ExpireTime: 1580169600, // Jan 28th, 2020
}},
7: {{
Vote: Vote{
Id: VoteIDHeaderCommitments,
Description: "Enable header commitments as defined in DCP0005",
Mask: 0x0006, // Bits 1 and 2
Choices: []Choice{{
Id: "abstain",
Description: "abstain voting for change",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "keep the existing consensus rules",
Bits: 0x0002, // Bit 1
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "change to the new consensus rules",
Bits: 0x0004, // Bit 2
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1567641600, // Sep 5th, 2019
ExpireTime: 1599264000, // Sep 5th, 2020
}},
8: {{
Vote: Vote{
Id: VoteIDTreasury,
Description: "Enable decentralized Treasury opcodes as defined in DCP0006",
Mask: 0x0006, // Bits 1 and 2
Choices: []Choice{{
Id: "abstain",
Description: "abstain voting for change",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "keep the existing consensus rules",
Bits: 0x0002, // Bit 1
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "change to the new consensus rules",
Bits: 0x0004, // Bit 2
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1596240000, // Aug 1st, 2020
ExpireTime: 1627776000, // Aug 1st, 2021
}},
9: {{
Vote: Vote{
Id: VoteIDRevertTreasuryPolicy,
Description: "Change maximum treasury expenditure policy as defined in DCP0007",
Mask: 0x0006, // Bits 1 and 2
Choices: []Choice{{
Id: "abstain",
Description: "abstain voting for change",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "keep the existing consensus rules",
Bits: 0x0002, // Bit 1
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "change to the new consensus rules",
Bits: 0x0004, // Bit 2
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1631750400, // Sep 16th, 2021
ExpireTime: 1694822400, // Sep 16th, 2023
}, {
Vote: Vote{
Id: VoteIDExplicitVersionUpgrades,
Description: "Enable explicit version upgrades as defined in DCP0008",
Mask: 0x0018, // Bits 3 and 4
Choices: []Choice{{
Id: "abstain",
Description: "abstain from voting",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "keep the existing consensus rules",
Bits: 0x0008, // Bit 3
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "change to the new consensus rules",
Bits: 0x0010, // Bit 4
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1631750400, // Sep 16th, 2021
ExpireTime: 1694822400, // Sep 16th, 2023
}, {
Vote: Vote{
Id: VoteIDAutoRevocations,
Description: "Enable automatic ticket revocations as defined in DCP0009",
Mask: 0x0060, // Bits 5 and 6
Choices: []Choice{{
Id: "abstain",
Description: "abstain voting for change",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "keep the existing consensus rules",
Bits: 0x0020, // Bit 5
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "change to the new consensus rules",
Bits: 0x0040, // Bit 6
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1631750400, // Sep 16th, 2021
ExpireTime: 1694822400, // Sep 16th, 2023
}, {
Vote: Vote{
Id: VoteIDChangeSubsidySplit,
Description: "Change block reward subsidy split to 10/80/10 as defined in DCP0010",
Mask: 0x0180, // Bits 7 and 8
Choices: []Choice{{
Id: "abstain",
Description: "abstain from voting",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "keep the existing consensus rules",
Bits: 0x0080, // Bit 7
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "change to the new consensus rules",
Bits: 0x0100, // Bit 8
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1631750400, // Sep 16th, 2021
ExpireTime: 1694822400, // Sep 16th, 2023
}},
10: {{
Vote: Vote{
Id: VoteIDBlake3Pow,
Description: "Change proof of work hashing algorithm to BLAKE3 as defined in in DCP0011",
Mask: 0x0006, // Bits 1 and 2
Choices: []Choice{{
Id: "abstain",
Description: "abstain voting for change",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "keep the existing consensus rules",
Bits: 0x0002, // Bit 1
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "change to the new consensus rules",
Bits: 0x0004, // Bit 2
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1682294400, // Apr 24th, 2023
ExpireTime: 1745452800, // Apr 24th, 2025
}, {
Vote: Vote{
Id: VoteIDChangeSubsidySplitR2,
Description: "Change block reward subsidy split to 1/89/10 as defined in DCP0012",
Mask: 0x0060, // Bits 5 and 6
Choices: []Choice{{
Id: "abstain",
Description: "abstain voting for change",
Bits: 0x0000,
IsAbstain: true,
IsNo: false,
}, {
Id: "no",
Description: "keep the existing consensus rules",
Bits: 0x0020, // Bit 5
IsAbstain: false,
IsNo: true,
}, {
Id: "yes",
Description: "change to the new consensus rules",
Bits: 0x0040, // Bit 6
IsAbstain: false,
IsNo: false,
}},
},
StartTime: 1682294400, // Apr 24th, 2023
ExpireTime: 1745452800, // Apr 24th, 2025
}},
},
// Enforce current block version once majority of the network has
// upgraded.
// 75% (750 / 1000)
//
// Reject previous block versions once a majority of the network has
// upgraded.
// 95% (950 / 1000)
BlockEnforceNumRequired: 750,
BlockRejectNumRequired: 950,
BlockUpgradeNumToCheck: 1000,
// AcceptNonStdTxs is a mempool param to either accept and relay non
// standard txs to the network or reject them
AcceptNonStdTxs: false,
// Address encoding magics
NetworkAddressPrefix: "D",
PubKeyAddrID: [2]byte{0x13, 0x86}, // starts with Dk
PubKeyHashAddrID: [2]byte{0x07, 0x3f}, // starts with Ds
PKHEdwardsAddrID: [2]byte{0x07, 0x1f}, // starts with De
PKHSchnorrAddrID: [2]byte{0x07, 0x01}, // starts with DS
ScriptHashAddrID: [2]byte{0x07, 0x1a}, // starts with Dc
PrivateKeyID: [2]byte{0x22, 0xde}, // starts with Pm
// BIP32 hierarchical deterministic extended key magics
HDPrivateKeyID: [4]byte{0x02, 0xfd, 0xa4, 0xe8}, // starts with dprv
HDPublicKeyID: [4]byte{0x02, 0xfd, 0xa9, 0x26}, // starts with dpub
// BIP44 coin type used in the hierarchical deterministic path for
// address generation.
SLIP0044CoinType: 42, // SLIP0044, Decred
LegacyCoinType: 20, // for backwards compatibility
// Decred PoS parameters
MinimumStakeDiff: 2 * 1e8, // 2 Coin
TicketPoolSize: 8192,
TicketsPerBlock: 5,
TicketMaturity: 256,
TicketExpiry: 40960, // 5*TicketPoolSize
CoinbaseMaturity: 256,
SStxChangeMaturity: 1,
TicketPoolSizeWeight: 4,
StakeDiffAlpha: 1, // Minimal
StakeDiffWindowSize: 144,
StakeDiffWindows: 20,
StakeVersionInterval: 144 * 2 * 7, // ~1 week
MaxFreshStakePerBlock: 20, // 4*TicketsPerBlock
StakeEnabledHeight: 256 + 256, // CoinbaseMaturity + TicketMaturity
StakeValidationHeight: 4096, // ~14 days
StakeBaseSigScript: []byte{0x00, 0x00},
StakeMajorityMultiplier: 3,
StakeMajorityDivisor: 4,
// Decred organization related parameters
// Organization address is Dcur2mcGjmENx4DhNqDctW5wJCVyT3Qeqkx
OrganizationPkScript: hexDecode("a914f5916158e3e2c4551c1796708db8367207ed13bb87"),
OrganizationPkScriptVersion: 0,
BlockOneLedger: tokenPayouts_MainNetParams(),
// Sanctioned Politeia keys.
PiKeys: [][]byte{
hexDecode("03f6e7041f1cf51ee10e0a01cd2b0385ce3cd9debaabb2296f7e9dee9329da946c"),
hexDecode("0319a37405cb4d1691971847d7719cfce70857c0f6e97d7c9174a3998cf0ab86dd"),
},
// ~1 day for tspend inclusion
TreasuryVoteInterval: 288,
// ~7.2 days for short circuit approval, ~42%
// target=ticket-pool-equivalent participation
TreasuryVoteIntervalMultiplier: 12,
// Sum of tspends within any ~24 day window cannot exceed
// policy check
TreasuryExpenditureWindow: 2,
// policy check is average of prior ~4.8 months + a 50%
// increase allowance
TreasuryExpenditurePolicy: 6,
// 16000 dcr/tew as expense bootstrap
TreasuryExpenditureBootstrap: 16000 * 1e8,
TreasuryVoteQuorumMultiplier: 1, // 20% quorum required
TreasuryVoteQuorumDivisor: 5,
TreasuryVoteRequiredMultiplier: 3, // 60% yes votes required
TreasuryVoteRequiredDivisor: 5,
seeders: []string{
"mainnet-seed-1.decred.org",
"mainnet-seed-2.decred.org",
"mainnet-seed.dcrdata.org",
"mainnet-seed.jholdstock.uk",
},
}
}