Testnet Reset

This adds a new testnet2 network with new genesis block, premine
address, magic number, etc.

Corrected some testnet related comments while there.

blockchain/chain.go

@@ -2193,8 +2193,9 @@ func (b *BlockChain) BestSnapshot() *BestState {
 //
 // This function MUST be called with the chain state lock held (for reads).
 func (b *BlockChain) maxBlockSize(prevNode *blockNode) (int64, error) {
-	// Hard fork voting on block size is not enabled on mainnet.
-	if b.chainParams.Net == wire.MainNet {
+	// Hard fork voting on block size is only enabled on testnet v1 and
+	// simnet.
+	if b.chainParams.Net != wire.TestNet && b.chainParams.Net != wire.SimNet {
 		return int64(b.chainParams.MaximumBlockSizes[0]), nil
 	}
 

chaincfg/genesis.go

@@ -159,6 +159,32 @@ var testNetGenesisBlock = wire.MsgBlock{
 // test network.
 var testNetGenesisHash = testNetGenesisBlock.BlockHash()
 
+// TestNet2 ------------------------------------------------------------------------
+
+// testNetGenesisMerkleRoot is the hash of the first transaction in the genesis block
+// for the test network.
+var testNet2GenesisMerkleRoot = genesisCoinbaseTxLegacy.TxHash()
+
+// testNetGenesisBlock defines the genesis block of the block chain which
+// serves as the public transaction ledger for the test network (version 3).
+var testNet2GenesisBlock = wire.MsgBlock{
+	Header: wire.BlockHeader{
+		Version:      4,
+		PrevBlock:    chainhash.Hash{},
+		MerkleRoot:   testNetGenesisMerkleRoot,
+		Timestamp:    time.Unix(1489550400, 0), // 2017-03-15 TestNet10
+		Bits:         0x1e00ffff,
+		SBits:        20000000,
+		Nonce:        0x18aea41a,
+		StakeVersion: 0,
+	},
+	Transactions: []*wire.MsgTx{&genesisCoinbaseTxLegacy},
+}
+
+// testNetGenesisHash is the hash of the first block in the block chain for the
+// test network.
+var testNet2GenesisHash = testNet2GenesisBlock.BlockHash()
+
 // SimNet -------------------------------------------------------------------------
 
 var regTestGenesisCoinbaseTx = wire.MsgTx{

chaincfg/params.go

@@ -709,6 +709,115 @@ var TestNetParams = Params{
 	BlockOneLedger:              BlockOneLedgerTestNet,
 }
 
+// Test2NetParams defines the network parameters for the test currency network.
+// This network is sometimes simply called "testnet".
+// This is the second public iteration of testnet.
+var TestNet2Params = Params{
+	Name:        "testnet2",
+	Net:         wire.TestNet2,
+	DefaultPort: "19108",
+	DNSSeeds: []string{
+		"testnet-seed.decred.mindcry.org",
+		"testnet-seed.decred.netpurgatory.org",
+		"testnet.decredseed.org",
+		"testnet-seed.decred.org",
+	},
+
+	// Chain parameters
+	GenesisBlock:             &testNet2GenesisBlock,
+	GenesisHash:              &testNet2GenesisHash,
+	PowLimit:                 testNetPowLimit,
+	PowLimitBits:             0x1e00ffff,
+	ReduceMinDifficulty:      false,
+	MinDiffReductionTime:     0, // Does not apply since ReduceMinDifficulty false
+	GenerateSupported:        true,
+	MaximumBlockSizes:        []int{1310720},
+	MaxTxSize:                1000000,
+	TargetTimePerBlock:       time.Minute * 2,
+	WorkDiffAlpha:            1,
+	WorkDiffWindowSize:       144,
+	WorkDiffWindows:          20,
+	TargetTimespan:           time.Minute * 2 * 144, // TimePerBlock * WindowSize
+	RetargetAdjustmentFactor: 4,
+
+	// Subsidy parameters.
+	BaseSubsidy:              2500000000, // 25 Coin
+	MulSubsidy:               100,
+	DivSubsidy:               101,
+	SubsidyReductionInterval: 2048,
+	WorkRewardProportion:     6,
+	StakeRewardProportion:    3,
+	BlockTaxProportion:       1,
+
+	// Checkpoints ordered from oldest to newest.
+	Checkpoints: []Checkpoint{},
+
+	// Consensus rule change deployments.
+	//
+	// The miner confirmation window is defined as:
+	//   target proof of work timespan / target proof of work spacing
+	RuleChangeActivationQuorum:     2520, // 10 % of RuleChangeActivationInterval * TicketsPerBlock
+	RuleChangeActivationMultiplier: 3,    // 75%
+	RuleChangeActivationDivisor:    4,
+	RuleChangeActivationInterval:   5040, // 1 week
+
+	// Enforce current block version once majority of the network has
+	// upgraded.
+	// 51% (51 / 100)
+	// Reject previous block versions once a majority of the network has
+	// upgraded.
+	// 75% (75 / 100)
+	BlockEnforceNumRequired: 51,
+	BlockRejectNumRequired:  75,
+	BlockUpgradeNumToCheck:  100,
+
+	// Mempool parameters
+	RelayNonStdTxs: false,
+
+	// Address encoding magics
+	NetworkAddressPrefix: "T",
+	PubKeyAddrID:         [2]byte{0x28, 0xf7}, // starts with Tk
+	PubKeyHashAddrID:     [2]byte{0x0f, 0x21}, // starts with Ts
+	PKHEdwardsAddrID:     [2]byte{0x0f, 0x01}, // starts with Te
+	PKHSchnorrAddrID:     [2]byte{0x0e, 0xe3}, // starts with TS
+	ScriptHashAddrID:     [2]byte{0x0e, 0xfc}, // starts with Tc
+	PrivateKeyID:         [2]byte{0x23, 0x0e}, // starts with Pt
+
+	// BIP32 hierarchical deterministic extended key magics
+	HDPrivateKeyID: [4]byte{0x04, 0x35, 0x83, 0x97}, // starts with tprv
+	HDPublicKeyID:  [4]byte{0x04, 0x35, 0x87, 0xd1}, // starts with tpub
+
+	// BIP44 coin type used in the hierarchical deterministic path for
+	// address generation.
+	HDCoinType: 11,
+
+	// Decred PoS parameters
+	MinimumStakeDiff:        20000000, // 0.2 Coin
+	TicketPoolSize:          1024,
+	TicketsPerBlock:         5,
+	TicketMaturity:          16,
+	TicketExpiry:            6144, // 6*TicketPoolSize
+	CoinbaseMaturity:        16,
+	SStxChangeMaturity:      1,
+	TicketPoolSizeWeight:    4,
+	StakeDiffAlpha:          1,
+	StakeDiffWindowSize:     144,
+	StakeDiffWindows:        20,
+	StakeVersionInterval:    144 * 2 * 7, // ~1 week
+	MaxFreshStakePerBlock:   20,          // 4*TicketsPerBlock
+	StakeEnabledHeight:      16 + 16,     // CoinbaseMaturity + TicketMaturity
+	StakeValidationHeight:   768,         // Arbitrary
+	StakeBaseSigScript:      []byte{0xDE, 0xAD, 0xBE, 0xEF},
+	StakeMajorityMultiplier: 3,
+	StakeMajorityDivisor:    4,
+
+	// Decred organization related parameters.
+	// Organization address is TccTkqj8wFqrUemmHMRSx8SYEueQYLmuuFk
+	OrganizationPkScript:        hexDecode("4fa6cbd0dbe5ec407fe4c8ad374e667771fa0d44"),
+	OrganizationPkScriptVersion: 0,
+	BlockOneLedger:              BlockOneLedgerTestNet2,
+}
+
 // SimNetParams defines the network parameters for the simulation test Decred
 // network.  This network is similar to the normal test network except it is
 // intended for private use within a group of individuals doing simulation
@@ -1048,5 +1157,6 @@ func init() {
 	// Register all default networks when the package is initialized.
 	mustRegister(&MainNetParams)
 	mustRegister(&TestNetParams)
+	mustRegister(&TestNet2Params)
 	mustRegister(&SimNetParams)
 }

chaincfg/premine.go

@@ -3162,6 +3162,12 @@ var BlockOneLedgerTestNet = []*TokenPayout{
 	{"TsmWaPM77WSyA3aiQ2Q1KnwGDVWvEkhipBc", 100000 * 1e8},
 }
 
+// BlockOneLedgerTestNet2 is the block one output ledger for the 2nd test
+// network.
+var BlockOneLedgerTestNet2 = []*TokenPayout{
+	{"TsT5rhHYqJF7sXouh9jHtwQEn5YJ9KKc5L9", 100000 * 1e8},
+}
+
 // BlockOneLedgerSimNet is the block one output ledger for the simulation
 // network. See under "Decred organization related parameters" in params.go
 // for information on how to spend these outputs.

config.go

@@ -511,7 +511,7 @@ func loadConfig() (*config, []string, error) {
 	// while we're at it
 	if cfg.TestNet {
 		numNets++
-		activeNetParams = &testNetParams
+		activeNetParams = &testNet2Params
 	}
 	if cfg.SimNet {
 		numNets++

params.go

@@ -33,13 +33,19 @@ var mainNetParams = params{
 }
 
 // testNetParams contains parameters specific to the test network (version 0)
-// (wire.TestNet).  NOTE: The RPC port is intentionally different than the
-// reference implementation - see the mainNetParams comment for details.
+// (wire.TestNet).
 var testNetParams = params{
 	Params:  &chaincfg.TestNetParams,
 	rpcPort: "19109",
 }
 
+// testNetParams contains parameters specific to the test network (version 2)
+// (wire.TestNet2).
+var testNet2Params = params{
+	Params:  &chaincfg.TestNet2Params,
+	rpcPort: "19109",
+}
+
 // simNetParams contains parameters specific to the simulation test network
 // (wire.SimNet).
 var simNetParams = params{

wire/protocol.go

@@ -89,23 +89,27 @@ const (
 	// MainNet represents the main decred network.
 	MainNet CurrencyNet = 0xd9b400f9
 
-	// TestNet represents the regression test network.
+	// RegTest represents the regression test network.
 	RegTest CurrencyNet = 0xdab500fa
 
-	// TestNet represents the test network (version 3).
+	// TestNet represents the test network.
 	TestNet CurrencyNet = 0x0709000b
 
+	// TestNet2 represents the 2nd test network.
+	TestNet2 CurrencyNet = 0x48e7a065
+
 	// SimNet represents the simulation test network.
 	SimNet CurrencyNet = 0x12141c16
 )
 
 // bnStrings is a map of decred networks back to their constant names for
 // pretty printing.
 var bnStrings = map[CurrencyNet]string{
-	MainNet: "MainNet",
-	TestNet: "TestNet",
-	RegTest: "RegNet",
-	SimNet:  "SimNet",
+	MainNet:  "MainNet",
+	TestNet:  "TestNet",
+	TestNet2: "TestNet2",
+	RegTest:  "RegNet",
+	SimNet:   "SimNet",
 }
 
 // String returns the CurrencyNet in human-readable form.