diff --git a/chaincfg/params.go b/chaincfg/params.go index a6d8d3e5..68c362d5 100644 --- a/chaincfg/params.go +++ b/chaincfg/params.go @@ -25,8 +25,8 @@ var ( bigOne = big.NewInt(1) // mainPowLimit is the highest proof of work value a Bitcoin 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) + // have for the main network. It is the value 2^240 - 1. + mainPowLimit = new(big.Int).Sub(new(big.Int).Lsh(bigOne, 240), bigOne) // regressionPowLimit is the highest proof of work value a Bitcoin block // can have for the regression test network. It is the value 2^255 - 1. @@ -34,8 +34,8 @@ var ( // testNet3PowLimit is the highest proof of work value a Bitcoin block // can have for the test network (version 3). It is the value - // 2^224 - 1. - testNet3PowLimit = new(big.Int).Sub(new(big.Int).Lsh(bigOne, 224), bigOne) + // 2^240 - 1. + testNet3PowLimit = new(big.Int).Sub(new(big.Int).Lsh(bigOne, 240), bigOne) // simNetPowLimit is the highest proof of work value a Bitcoin block // can have for the simulation test network. It is the value 2^255 - 1. @@ -102,6 +102,9 @@ type ConsensusDeployment struct { // ExpireTime is the median block time after which the attempted // deployment expires. ExpireTime uint64 + + // ForceActiveAt is added by LBRY to bypass consensus. Features are activated via hard-fork instead. + ForceActiveAt int32 } // Constants that define the deployment offset in the deployments field of the @@ -237,11 +240,9 @@ type Params struct { Bech32HRPSegwit string // Address encoding magics - PubKeyHashAddrID byte // First byte of a P2PKH address - ScriptHashAddrID byte // First byte of a P2SH address - PrivateKeyID byte // First byte of a WIF private key - WitnessPubKeyHashAddrID byte // First byte of a P2WPKH address - WitnessScriptHashAddrID byte // First byte of a P2WSH address + PubKeyHashAddrID byte // First byte of a P2PKH address + ScriptHashAddrID byte // First byte of a P2SH address + PrivateKeyID byte // First byte of a WIF private key // BIP32 hierarchical deterministic extended key magics HDPrivateKeyID [4]byte @@ -256,60 +257,58 @@ type Params struct { var MainNetParams = Params{ Name: "mainnet", Net: wire.MainNet, - DefaultPort: "8333", + DefaultPort: "9246", DNSSeeds: []DNSSeed{ - {"seed.bitcoin.sipa.be", true}, - {"dnsseed.bluematt.me", true}, - {"dnsseed.bitcoin.dashjr.org", false}, - {"seed.bitcoinstats.com", true}, - {"seed.bitnodes.io", false}, - {"seed.bitcoin.jonasschnelli.ch", true}, + {"dnsseed1.lbry.com", true}, + {"dnsseed2.lbry.com", true}, + {"dnsseed3.lbry.com", true}, + {"seed.lbry.grin.io", true}, + {"seed.allaboutlbc.com", true}, }, // Chain parameters GenesisBlock: &genesisBlock, GenesisHash: &genesisHash, PowLimit: mainPowLimit, - PowLimitBits: 0x1d00ffff, - BIP0034Height: 227931, // 000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8 - BIP0065Height: 388381, // 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0 - BIP0066Height: 363725, // 00000000000000000379eaa19dce8c9b722d46ae6a57c2f1a988119488b50931 + PowLimitBits: 0x1f00ffff, + BIP0034Height: 1, + BIP0065Height: 200000, + BIP0066Height: 200000, CoinbaseMaturity: 100, - SubsidyReductionInterval: 210000, - TargetTimespan: time.Hour * 24 * 14, // 14 days - TargetTimePerBlock: time.Minute * 10, // 10 minutes - RetargetAdjustmentFactor: 4, // 25% less, 400% more + SubsidyReductionInterval: 1 << 5, + TargetTimespan: time.Second * 150, // retarget every block + TargetTimePerBlock: time.Second * 150, // 150 seconds + RetargetAdjustmentFactor: 4, // 25% less, 400% more ReduceMinDifficulty: false, MinDiffReductionTime: 0, GenerateSupported: false, // Checkpoints ordered from oldest to newest. Checkpoints: []Checkpoint{ - {11111, newHashFromStr("0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d")}, - {33333, newHashFromStr("000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6")}, - {74000, newHashFromStr("0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20")}, - {105000, newHashFromStr("00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97")}, - {134444, newHashFromStr("00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe")}, - {168000, newHashFromStr("000000000000099e61ea72015e79632f216fe6cb33d7899acb35b75c8303b763")}, - {193000, newHashFromStr("000000000000059f452a5f7340de6682a977387c17010ff6e6c3bd83ca8b1317")}, - {210000, newHashFromStr("000000000000048b95347e83192f69cf0366076336c639f9b7228e9ba171342e")}, - {216116, newHashFromStr("00000000000001b4f4b433e81ee46494af945cf96014816a4e2370f11b23df4e")}, - {225430, newHashFromStr("00000000000001c108384350f74090433e7fcf79a606b8e797f065b130575932")}, - {250000, newHashFromStr("000000000000003887df1f29024b06fc2200b55f8af8f35453d7be294df2d214")}, - {267300, newHashFromStr("000000000000000a83fbd660e918f218bf37edd92b748ad940483c7c116179ac")}, - {279000, newHashFromStr("0000000000000001ae8c72a0b0c301f67e3afca10e819efa9041e458e9bd7e40")}, - {300255, newHashFromStr("0000000000000000162804527c6e9b9f0563a280525f9d08c12041def0a0f3b2")}, - {319400, newHashFromStr("000000000000000021c6052e9becade189495d1c539aa37c58917305fd15f13b")}, - {343185, newHashFromStr("0000000000000000072b8bf361d01a6ba7d445dd024203fafc78768ed4368554")}, - {352940, newHashFromStr("000000000000000010755df42dba556bb72be6a32f3ce0b6941ce4430152c9ff")}, - {382320, newHashFromStr("00000000000000000a8dc6ed5b133d0eb2fd6af56203e4159789b092defd8ab2")}, - {400000, newHashFromStr("000000000000000004ec466ce4732fe6f1ed1cddc2ed4b328fff5224276e3f6f")}, - {430000, newHashFromStr("000000000000000001868b2bb3a285f3cc6b33ea234eb70facf4dcdf22186b87")}, - {460000, newHashFromStr("000000000000000000ef751bbce8e744ad303c47ece06c8d863e4d417efc258c")}, - {490000, newHashFromStr("000000000000000000de069137b17b8d5a3dfbd5b145b2dcfb203f15d0c4de90")}, - {520000, newHashFromStr("0000000000000000000d26984c0229c9f6962dc74db0a6d525f2f1640396f69c")}, - {550000, newHashFromStr("000000000000000000223b7a2298fb1c6c75fb0efc28a4c56853ff4112ec6bc9")}, - {560000, newHashFromStr("0000000000000000002c7b276daf6efb2b6aa68e2ce3be67ef925b3264ae7122")}, + {40000, newHashFromStr("4c55584b068108b15c0066a010d11971aa92f46b0a73d479f1b7fa57df8b05f4")}, + {80000, newHashFromStr("6e9facdfb87ba8394a46c61a7c093f7f00b1397a2dabc6a04f2911e0efdcf50a")}, + {120000, newHashFromStr("6a9dba420ec544b927769765dccec8b29e214e6ca9f82b54a52bf20ca517b75a")}, + {160000, newHashFromStr("87b2913a509d857401f7587903c90214db7847af1a1ad63a3b6f245936e3ae9d")}, + {200000, newHashFromStr("0fe8ed6019a83028006435e47be4e37a0d3ed48019cde1dc7ede6562e5829839")}, + {240000, newHashFromStr("cb3c2342afbe7291012f2288403a9d105f46987f78b279d516db2deb4d35b0b7")}, + {280000, newHashFromStr("9835d03eb527ea4ce45c217350c68042926d497c21fb31413b2f7824ff6fc6c3")}, + {320000, newHashFromStr("ad80c7cb91ca1d9c9b7bf68ca1b6d4ba217fe25ca5ded6a7e8acbaba663b143f")}, + {360000, newHashFromStr("f9fd013252439663c1e729a8afb27187a8b9cc63a253336060f867e3cfbe4dcb")}, + {400000, newHashFromStr("f0e56e70782af63ccb49c76e852540688755869ba59ec68cac9c04a6b4d9f5ca")}, + {440000, newHashFromStr("52760e00c369b40781a2ced32836711fab82a720fafb121118c815bb46afd996")}, + {480000, newHashFromStr("cecacaf4d1a8d1ef60da39343540781115abb91f5f0c976bb08afc4d4e3218ac")}, + {520000, newHashFromStr("fa5e9d6dcf9ad57ba60d8ba26fb05585741098d10f42ed9d5e6b5e90ebc278d6")}, + {560000, newHashFromStr("95c6229bd9b40f03a8426b2fec740026b3f06b1628cfb87527b0cbd0da328c0c")}, + {600000, newHashFromStr("532657a97d480feb2d0423bb736cbfd7400b3ac8311e81ac749a2f29103a6c6b")}, + {640000, newHashFromStr("68b69e3e8765e1ddbac63cbfbbf12e1a920da994d242a26fd07624f067743080")}, + {680000, newHashFromStr("7b9f30c959405b5b96d0b0c2ba8fc7c5586cd0ce40df51427de4b8a217859c45")}, + {720000, newHashFromStr("42084d5f88c71c0ae09b8677070969df9c3ef875c5f434133f552d863204f0cb")}, + {760000, newHashFromStr("1887cd8b50375a9ac0dc9686c98fa8ac69bca618eab6254310647057f6fe4fc9")}, + {800000, newHashFromStr("d34bb871b21e6fda4bd9d9e530ebf12e044814004007f088415035c651ecf322")}, + {840000, newHashFromStr("d0e73c5ce3ad5d6fdb4483aa450f0b1cf7e4570987ee3a3806ace4ad2f7cc9af")}, + {880000, newHashFromStr("806a95f26bab603f1d9132b5d4ea72aab9d1198ad55ae18dac1e149f6cb70ce4")}, + {920000, newHashFromStr("83bc84555105436c51728ab200e8da4d9b3a365fd3d1d47a60048ad0f977c55b")}, + {960000, newHashFromStr("60e37b1c2d1f8771290b7f84865cbadf22b5b89d3ce1201d454b09f0775b42c2")}, }, // Consensus rule change deployments. @@ -325,14 +324,16 @@ var MainNetParams = Params{ ExpireTime: 1230767999, // December 31, 2008 UTC }, DeploymentCSV: { - BitNumber: 0, - StartTime: 1462060800, // May 1st, 2016 - ExpireTime: 1493596800, // May 1st, 2017 + BitNumber: 0, + StartTime: 1462060800, // May 1st, 2016 + ExpireTime: 1493596800, // May 1st, 2017 + ForceActiveAt: 200000, }, DeploymentSegwit: { - BitNumber: 1, - StartTime: 1479168000, // November 15, 2016 UTC - ExpireTime: 1510704000, // November 15, 2017 UTC. + BitNumber: 1, + StartTime: 1547942400, // Jan 20, 2019 + ExpireTime: 1548288000, // Jan 24, 2019 + ForceActiveAt: 680770, }, }, @@ -341,18 +342,16 @@ var MainNetParams = Params{ // Human-readable part for Bech32 encoded segwit addresses, as defined in // BIP 173. - Bech32HRPSegwit: "bc", // always bc for main net + Bech32HRPSegwit: "lbc", // Address encoding magics - PubKeyHashAddrID: 0x00, // starts with 1 - ScriptHashAddrID: 0x05, // starts with 3 - PrivateKeyID: 0x80, // starts with 5 (uncompressed) or K (compressed) - WitnessPubKeyHashAddrID: 0x06, // starts with p2 - WitnessScriptHashAddrID: 0x0A, // starts with 7Xh + PubKeyHashAddrID: 0x55, + ScriptHashAddrID: 0x7a, + PrivateKeyID: 0x1c, // BIP32 hierarchical deterministic extended key magics - HDPrivateKeyID: [4]byte{0x04, 0x88, 0xad, 0xe4}, // starts with xprv - HDPublicKeyID: [4]byte{0x04, 0x88, 0xb2, 0x1e}, // starts with xpub + HDPrivateKeyID: [4]byte{0x04, 0x88, 0xad, 0xe4}, + HDPublicKeyID: [4]byte{0x04, 0x88, 0xb2, 0x1e}, // BIP44 coin type used in the hierarchical deterministic path for // address generation. @@ -365,7 +364,7 @@ var MainNetParams = Params{ var RegressionNetParams = Params{ Name: "regtest", Net: wire.TestNet, - DefaultPort: "18444", + DefaultPort: "29246", DNSSeeds: []DNSSeed{}, // Chain parameters @@ -374,15 +373,15 @@ var RegressionNetParams = Params{ PowLimit: regressionPowLimit, PowLimitBits: 0x207fffff, CoinbaseMaturity: 100, - BIP0034Height: 100000000, // Not active - Permit ver 1 blocks - BIP0065Height: 1351, // Used by regression tests - BIP0066Height: 1251, // Used by regression tests - SubsidyReductionInterval: 150, - TargetTimespan: time.Hour * 24 * 14, // 14 days - TargetTimePerBlock: time.Minute * 10, // 10 minutes - RetargetAdjustmentFactor: 4, // 25% less, 400% more - ReduceMinDifficulty: true, - MinDiffReductionTime: time.Minute * 20, // TargetTimePerBlock * 2 + BIP0034Height: 1000, + BIP0065Height: 1351, // Used by regression tests + BIP0066Height: 1251, // Used by regression tests + SubsidyReductionInterval: 1 << 5, + TargetTimespan: time.Second, + TargetTimePerBlock: time.Second, + RetargetAdjustmentFactor: 4, // 25% less, 400% more + ReduceMinDifficulty: false, + MinDiffReductionTime: 0, GenerateSupported: true, // Checkpoints ordered from oldest to newest. @@ -401,14 +400,16 @@ var RegressionNetParams = Params{ ExpireTime: math.MaxInt64, // Never expires }, DeploymentCSV: { - BitNumber: 0, - StartTime: 0, // Always available for vote - ExpireTime: math.MaxInt64, // Never expires + BitNumber: 0, + StartTime: 0, // Always available for vote + ExpireTime: math.MaxInt64, // Never expires + ForceActiveAt: 1, }, DeploymentSegwit: { - BitNumber: 1, - StartTime: 0, // Always available for vote - ExpireTime: math.MaxInt64, // Never expires. + BitNumber: 1, + StartTime: 0, + ExpireTime: math.MaxInt64, + ForceActiveAt: 150, }, }, @@ -417,12 +418,12 @@ var RegressionNetParams = Params{ // Human-readable part for Bech32 encoded segwit addresses, as defined in // BIP 173. - Bech32HRPSegwit: "bcrt", // always bcrt for reg test net + Bech32HRPSegwit: "rlbc", // Address encoding magics - PubKeyHashAddrID: 0x6f, // starts with m or n - ScriptHashAddrID: 0xc4, // starts with 2 - PrivateKeyID: 0xef, // starts with 9 (uncompressed) or c (compressed) + PubKeyHashAddrID: 111, // starts with m or n + ScriptHashAddrID: 196, // starts with 2 + PrivateKeyID: 239, // starts with 9 (uncompressed) or c (compressed) // BIP32 hierarchical deterministic extended key magics HDPrivateKeyID: [4]byte{0x04, 0x35, 0x83, 0x94}, // starts with tprv @@ -439,48 +440,31 @@ var RegressionNetParams = Params{ var TestNet3Params = Params{ Name: "testnet3", Net: wire.TestNet3, - DefaultPort: "18333", + DefaultPort: "19246", DNSSeeds: []DNSSeed{ - {"testnet-seed.bitcoin.jonasschnelli.ch", true}, - {"testnet-seed.bitcoin.schildbach.de", false}, - {"seed.tbtc.petertodd.org", true}, - {"testnet-seed.bluematt.me", false}, + {"testdnsseed1.lbry.com", true}, + {"testdnsseed2.lbry.com", true}, }, // Chain parameters GenesisBlock: &testNet3GenesisBlock, GenesisHash: &testNet3GenesisHash, PowLimit: testNet3PowLimit, - PowLimitBits: 0x1d00ffff, - BIP0034Height: 21111, // 0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8 - BIP0065Height: 581885, // 00000000007f6655f22f98e72ed80d8b06dc761d5da09df0fa1dc4be4f861eb6 - BIP0066Height: 330776, // 000000002104c8c45e99a8853285a3b592602a3ccde2b832481da85e9e4ba182 + PowLimitBits: 0x1f00ffff, + BIP0034Height: 21111, // 0x0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8 + BIP0065Height: 1200000, + BIP0066Height: 1200000, CoinbaseMaturity: 100, - SubsidyReductionInterval: 210000, - TargetTimespan: time.Hour * 24 * 14, // 14 days - TargetTimePerBlock: time.Minute * 10, // 10 minutes - RetargetAdjustmentFactor: 4, // 25% less, 400% more - ReduceMinDifficulty: true, - MinDiffReductionTime: time.Minute * 20, // TargetTimePerBlock * 2 - GenerateSupported: false, + SubsidyReductionInterval: 1 << 5, + TargetTimespan: time.Second * 150, // retarget every block + TargetTimePerBlock: time.Second * 150, // 150 seconds + RetargetAdjustmentFactor: 4, // 25% less, 400% more + ReduceMinDifficulty: false, + MinDiffReductionTime: 0, + GenerateSupported: true, // Checkpoints ordered from oldest to newest. - Checkpoints: []Checkpoint{ - {546, newHashFromStr("000000002a936ca763904c3c35fce2f3556c559c0214345d31b1bcebf76acb70")}, - {100000, newHashFromStr("00000000009e2958c15ff9290d571bf9459e93b19765c6801ddeccadbb160a1e")}, - {200000, newHashFromStr("0000000000287bffd321963ef05feab753ebe274e1d78b2fd4e2bfe9ad3aa6f2")}, - {300001, newHashFromStr("0000000000004829474748f3d1bc8fcf893c88be255e6d7f571c548aff57abf4")}, - {400002, newHashFromStr("0000000005e2c73b8ecb82ae2dbc2e8274614ebad7172b53528aba7501f5a089")}, - {500011, newHashFromStr("00000000000929f63977fbac92ff570a9bd9e7715401ee96f2848f7b07750b02")}, - {600002, newHashFromStr("000000000001f471389afd6ee94dcace5ccc44adc18e8bff402443f034b07240")}, - {700000, newHashFromStr("000000000000406178b12a4dea3b27e13b3c4fe4510994fd667d7c1e6a3f4dc1")}, - {800010, newHashFromStr("000000000017ed35296433190b6829db01e657d80631d43f5983fa403bfdb4c1")}, - {900000, newHashFromStr("0000000000356f8d8924556e765b7a94aaebc6b5c8685dcfa2b1ee8b41acd89b")}, - {1000007, newHashFromStr("00000000001ccb893d8a1f25b70ad173ce955e5f50124261bbbc50379a612ddf")}, - {1100007, newHashFromStr("00000000000abc7b2cd18768ab3dee20857326a818d1946ed6796f42d66dd1e8")}, - {1200007, newHashFromStr("00000000000004f2dc41845771909db57e04191714ed8c963f7e56713a7b6cea")}, - {1300007, newHashFromStr("0000000072eab69d54df75107c052b26b0395b44f77578184293bf1bb1dbd9fa")}, - }, + Checkpoints: []Checkpoint{}, // Consensus rule change deployments. // @@ -500,9 +484,10 @@ var TestNet3Params = Params{ ExpireTime: 1493596800, // May 1st, 2017 }, DeploymentSegwit: { - BitNumber: 1, - StartTime: 1462060800, // May 1, 2016 UTC - ExpireTime: 1493596800, // May 1, 2017 UTC. + BitNumber: 1, + StartTime: 1462060800, // May 1st 2016 + ExpireTime: 1493596800, // May 1st 2017 + ForceActiveAt: 1198600, }, }, @@ -511,14 +496,12 @@ var TestNet3Params = Params{ // Human-readable part for Bech32 encoded segwit addresses, as defined in // BIP 173. - Bech32HRPSegwit: "tb", // always tb for test net + Bech32HRPSegwit: "tlbc", // Address encoding magics - PubKeyHashAddrID: 0x6f, // starts with m or n - ScriptHashAddrID: 0xc4, // starts with 2 - WitnessPubKeyHashAddrID: 0x03, // starts with QW - WitnessScriptHashAddrID: 0x28, // starts with T7n - PrivateKeyID: 0xef, // starts with 9 (uncompressed) or c (compressed) + PubKeyHashAddrID: 111, + ScriptHashAddrID: 196, + PrivateKeyID: 239, // BIP32 hierarchical deterministic extended key magics HDPrivateKeyID: [4]byte{0x04, 0x35, 0x83, 0x94}, // starts with tprv @@ -552,11 +535,11 @@ var SimNetParams = Params{ BIP0066Height: 0, // Always active on simnet CoinbaseMaturity: 100, SubsidyReductionInterval: 210000, - TargetTimespan: time.Hour * 24 * 14, // 14 days - TargetTimePerBlock: time.Minute * 10, // 10 minutes - RetargetAdjustmentFactor: 4, // 25% less, 400% more + TargetTimespan: time.Second * 150, + TargetTimePerBlock: time.Second * 150, + RetargetAdjustmentFactor: 4, // 25% less, 400% more ReduceMinDifficulty: true, - MinDiffReductionTime: time.Minute * 20, // TargetTimePerBlock * 2 + MinDiffReductionTime: 0, GenerateSupported: true, // Checkpoints ordered from oldest to newest. @@ -581,8 +564,8 @@ var SimNetParams = Params{ }, DeploymentSegwit: { BitNumber: 1, - StartTime: 0, // Always available for vote - ExpireTime: math.MaxInt64, // Never expires. + StartTime: 0, + ExpireTime: math.MaxInt64, }, }, @@ -591,14 +574,12 @@ var SimNetParams = Params{ // Human-readable part for Bech32 encoded segwit addresses, as defined in // BIP 173. - Bech32HRPSegwit: "sb", // always sb for sim net + Bech32HRPSegwit: "slbc", // Address encoding magics - PubKeyHashAddrID: 0x3f, // starts with S - ScriptHashAddrID: 0x7b, // starts with s - PrivateKeyID: 0x64, // starts with 4 (uncompressed) or F (compressed) - WitnessPubKeyHashAddrID: 0x19, // starts with Gg - WitnessScriptHashAddrID: 0x28, // starts with ? + PubKeyHashAddrID: 111, + ScriptHashAddrID: 196, + PrivateKeyID: 239, // BIP32 hierarchical deterministic extended key magics HDPrivateKeyID: [4]byte{0x04, 0x20, 0xb9, 0x00}, // starts with sprv @@ -691,14 +672,12 @@ func CustomSignetParams(challenge []byte, dnsSeeds []DNSSeed) Params { // Human-readable part for Bech32 encoded segwit addresses, as defined in // BIP 173. - Bech32HRPSegwit: "tb", // always tb for test net + Bech32HRPSegwit: "slbc", // Address encoding magics - PubKeyHashAddrID: 0x6f, // starts with m or n - ScriptHashAddrID: 0xc4, // starts with 2 - WitnessPubKeyHashAddrID: 0x03, // starts with QW - WitnessScriptHashAddrID: 0x28, // starts with T7n - PrivateKeyID: 0xef, // starts with 9 (uncompressed) or c (compressed) + PubKeyHashAddrID: 0x6f, // starts with m or n + ScriptHashAddrID: 0xc4, // starts with 2 + PrivateKeyID: 0xef, // starts with 9 (uncompressed) or c (compressed) // BIP32 hierarchical deterministic extended key magics HDPrivateKeyID: [4]byte{0x04, 0x35, 0x83, 0x94}, // starts with tprv