f860883562
chaincfg/v2 modified the Params type to contain the required payouts created by the miner of the block at height 1. However, it was discovered that, due to code generation issues of the Go compiler, this caused the package's weight (measured by github.com/jondot/goweight) to explode to 7.7 MB. This appears to be due to an enormous amount of function calls, all of which could panic, when building the large slice literal. This improves the compiled size of the package by using code generation techniques to optimize the memory layout and code transformation of the subsidy values each time a params function is called. A single string contains all scripts for subsidy payouts concatenated together, in hex encoding, and a slice contains the index in the script data and the required payout amount. This is iterated in a loop to create a []TokenPayout each time it is needed. The new size of the compiled package using Go 1.12.7 on OpenBSD/amd64 is 379 kB, a reduction of 7.32 MB, and about 5% of the original size.
209 lines
7.7 KiB
Go
209 lines
7.7 KiB
Go
// Copyright (c) 2014-2016 The btcsuite developers
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// Copyright (c) 2015-2019 The Decred developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package chaincfg
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import (
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"math/big"
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"time"
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"github.com/decred/dcrd/chaincfg/chainhash"
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"github.com/decred/dcrd/wire"
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)
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// SimNetParams returns the network parameters for the simulation test network.
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// This network is similar to the normal test network except it is intended for
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// private use within a group of individuals doing simulation testing and full
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// integration tests between different applications such as wallets, voting
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// service providers, mining pools, block explorers, and other services that
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// build on Decred.
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//
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// The functionality is intended to differ in that the only nodes which are
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// specifically specified are used to create the network rather than following
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// normal discovery rules. This is important as otherwise it would just turn
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// into another public testnet.
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func SimNetParams() *Params {
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// simNetPowLimit is the highest proof of work value a Decred block can have
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// for the simulation test network. It is the value 2^255 - 1.
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simNetPowLimit := new(big.Int).Sub(new(big.Int).Lsh(bigOne, 255), bigOne)
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// genesisBlock defines the genesis block of the block chain which serves
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// as the public transaction ledger for the simulation test network.
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genesisBlock := wire.MsgBlock{
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Header: wire.BlockHeader{
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Version: 1,
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PrevBlock: chainhash.Hash{}, // All zero.
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// MerkleRoot: Calculated below.
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StakeRoot: chainhash.Hash{}, // All zero.
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VoteBits: 0,
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FinalState: [6]byte{}, // All zero.
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Voters: 0,
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FreshStake: 0,
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Revocations: 0,
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Timestamp: time.Unix(1401292357, 0), // 2009-01-08 20:54:25 -0600 CST
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PoolSize: 0,
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Bits: 0x207fffff, // 545259519 [7fffff0000000000000000000000000000000000000000000000000000000000]
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SBits: 0,
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Nonce: 0,
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StakeVersion: 0,
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Height: 0,
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},
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Transactions: []*wire.MsgTx{{
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SerType: wire.TxSerializeFull,
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Version: 1,
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TxIn: []*wire.TxIn{{
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PreviousOutPoint: wire.OutPoint{
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Hash: chainhash.Hash{},
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Index: 0xffffffff,
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},
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SignatureScript: hexDecode("04ffff001d0104455468652054696d65" +
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"732030332f4a616e2f32303039204368616e63656c6c6f72206f6e" +
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"206272696e6b206f66207365636f6e64206261696c6f757420666f" +
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"722062616e6b73"),
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Sequence: 0xffffffff,
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}},
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TxOut: []*wire.TxOut{{
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Value: 0x00000000,
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PkScript: hexDecode("4104678afdb0fe5548271967f1a67130b7105c" +
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"d6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e5" +
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"1ec112de5c384df7ba0b8d578a4c702b6bf11d5fac"),
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}},
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LockTime: 0,
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Expiry: 0,
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}},
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}
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genesisBlock.Header.MerkleRoot = genesisBlock.Transactions[0].TxHashFull()
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return &Params{
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Name: "simnet",
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Net: wire.SimNet,
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DefaultPort: "18555",
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DNSSeeds: nil, // NOTE: There must NOT be any seeds.
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// Chain parameters
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GenesisBlock: &genesisBlock,
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GenesisHash: genesisBlock.BlockHash(),
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PowLimit: simNetPowLimit,
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PowLimitBits: 0x207fffff,
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ReduceMinDifficulty: false,
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MinDiffReductionTime: 0, // Does not apply since ReduceMinDifficulty false
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GenerateSupported: true,
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MaximumBlockSizes: []int{1310720},
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MaxTxSize: 1000000,
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TargetTimePerBlock: time.Second,
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WorkDiffAlpha: 1,
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WorkDiffWindowSize: 8,
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WorkDiffWindows: 4,
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TargetTimespan: time.Second * 8, // TimePerBlock * WindowSize
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RetargetAdjustmentFactor: 4,
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// Subsidy parameters.
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BaseSubsidy: 50000000000,
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MulSubsidy: 100,
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DivSubsidy: 101,
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SubsidyReductionInterval: 128,
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WorkRewardProportion: 6,
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StakeRewardProportion: 3,
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BlockTaxProportion: 1,
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// Checkpoints ordered from oldest to newest.
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Checkpoints: nil,
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// Consensus rule change deployments.
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//
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// The miner confirmation window is defined as:
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// target proof of work timespan / target proof of work spacing
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RuleChangeActivationQuorum: 160, // 10 % of RuleChangeActivationInterval * TicketsPerBlock
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RuleChangeActivationMultiplier: 3, // 75%
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RuleChangeActivationDivisor: 4,
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RuleChangeActivationInterval: 320, // 320 seconds
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// Enforce current block version once majority of the network has
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// upgraded.
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// 51% (51 / 100)
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// Reject previous block versions once a majority of the network has
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// upgraded.
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// 75% (75 / 100)
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BlockEnforceNumRequired: 51,
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BlockRejectNumRequired: 75,
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BlockUpgradeNumToCheck: 100,
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// AcceptNonStdTxs is a mempool param to either accept and relay non
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// standard txs to the network or reject them
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AcceptNonStdTxs: true,
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// Address encoding magics
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NetworkAddressPrefix: "S",
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PubKeyAddrID: [2]byte{0x27, 0x6f}, // starts with Sk
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PubKeyHashAddrID: [2]byte{0x0e, 0x91}, // starts with Ss
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PKHEdwardsAddrID: [2]byte{0x0e, 0x71}, // starts with Se
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PKHSchnorrAddrID: [2]byte{0x0e, 0x53}, // starts with SS
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ScriptHashAddrID: [2]byte{0x0e, 0x6c}, // starts with Sc
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PrivateKeyID: [2]byte{0x23, 0x07}, // starts with Ps
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// BIP32 hierarchical deterministic extended key magics
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HDPrivateKeyID: [4]byte{0x04, 0x20, 0xb9, 0x03}, // starts with sprv
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HDPublicKeyID: [4]byte{0x04, 0x20, 0xbd, 0x3d}, // starts with spub
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// BIP44 coin type used in the hierarchical deterministic path for
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// address generation.
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SLIP0044CoinType: 1, // SLIP0044, Testnet (all coins)
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LegacyCoinType: 115, // ASCII for s, for backwards compatibility
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// Decred PoS parameters
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MinimumStakeDiff: 20000,
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TicketPoolSize: 64,
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TicketsPerBlock: 5,
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TicketMaturity: 16,
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TicketExpiry: 384, // 6*TicketPoolSize
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CoinbaseMaturity: 16,
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SStxChangeMaturity: 1,
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TicketPoolSizeWeight: 4,
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StakeDiffAlpha: 1,
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StakeDiffWindowSize: 8,
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StakeDiffWindows: 8,
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StakeVersionInterval: 8 * 2 * 7,
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MaxFreshStakePerBlock: 20, // 4*TicketsPerBlock
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StakeEnabledHeight: 16 + 16, // CoinbaseMaturity + TicketMaturity
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StakeValidationHeight: 16 + (64 * 2), // CoinbaseMaturity + TicketPoolSize*2
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StakeBaseSigScript: []byte{0xDE, 0xAD, 0xBE, 0xEF},
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StakeMajorityMultiplier: 3,
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StakeMajorityDivisor: 4,
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// Decred organization related parameters
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//
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// Treasury address is a 3-of-3 P2SH going to a wallet with seed:
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// aardvark adroitness aardvark adroitness
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// aardvark adroitness aardvark adroitness
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// aardvark adroitness aardvark adroitness
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// aardvark adroitness aardvark adroitness
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// aardvark adroitness aardvark adroitness
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// aardvark adroitness aardvark adroitness
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// aardvark adroitness aardvark adroitness
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// aardvark adroitness aardvark adroitness
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// briefcase
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// (seed 0x0000000000000000000000000000000000000000000000000000000000000000)
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//
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// This same wallet owns the three ledger outputs for simnet.
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//
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// P2SH details for simnet treasury:
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//
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// redeemScript: 532103e8c60c7336744c8dcc7b85c27789950fc52aa4e48f895ebbfb
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// ac383ab893fc4c2103ff9afc246e0921e37d12e17d8296ca06a8f92a07fbe7857ed1d4
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// f0f5d94e988f21033ed09c7fa8b83ed53e6f2c57c5fa99ed2230c0d38edf53c0340d0f
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// c2e79c725a53ae
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// (3-of-3 multisig)
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// Pubkeys used:
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// SkQmxbeuEFDByPoTj41TtXat8tWySVuYUQpd4fuNNyUx51tF1csSs
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// SkQn8ervNvAUEX5Ua3Lwjc6BAuTXRznDoDzsyxgjYqX58znY7w9e4
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// SkQkfkHZeBbMW8129tZ3KspEh1XBFC1btbkgzs6cjSyPbrgxzsKqk
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//
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// Organization address is ScuQxvveKGfpG1ypt6u27F99Anf7EW3cqhq
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OrganizationPkScript: hexDecode("a914cbb08d6ca783b533b2c7d24a51fbca92d937bf9987"),
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OrganizationPkScriptVersion: 0,
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BlockOneLedger: tokenPayouts_SimNetParams(),
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}
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}
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