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Diffstat (limited to 'params/config.go')
| -rw-r--r-- | params/config.go | 541 |
1 files changed, 541 insertions, 0 deletions
diff --git a/params/config.go b/params/config.go new file mode 100644 index 0000000..23286cc --- /dev/null +++ b/params/config.go @@ -0,0 +1,541 @@ +// Copyright 2016 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum library is free software: you can redistribute it and/or modify +// it under the terms of the GNU Lesser General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// The go-ethereum library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package params + +import ( + "encoding/binary" + "fmt" + "math/big" + + "github.com/ava-labs/go-ethereum/common" + "github.com/ava-labs/go-ethereum/crypto" +) + +// Genesis hashes to enforce below configs on. +var ( + MainnetGenesisHash = common.HexToHash("0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3") + TestnetGenesisHash = common.HexToHash("0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d") + RinkebyGenesisHash = common.HexToHash("0x6341fd3daf94b748c72ced5a5b26028f2474f5f00d824504e4fa37a75767e177") + GoerliGenesisHash = common.HexToHash("0xbf7e331f7f7c1dd2e05159666b3bf8bc7a8a3a9eb1d518969eab529dd9b88c1a") +) + +// TrustedCheckpoints associates each known checkpoint with the genesis hash of +// the chain it belongs to. +var TrustedCheckpoints = map[common.Hash]*TrustedCheckpoint{ + MainnetGenesisHash: MainnetTrustedCheckpoint, + TestnetGenesisHash: TestnetTrustedCheckpoint, + RinkebyGenesisHash: RinkebyTrustedCheckpoint, + GoerliGenesisHash: GoerliTrustedCheckpoint, +} + +// CheckpointOracles associates each known checkpoint oracles with the genesis hash of +// the chain it belongs to. +var CheckpointOracles = map[common.Hash]*CheckpointOracleConfig{ + MainnetGenesisHash: MainnetCheckpointOracle, + TestnetGenesisHash: TestnetCheckpointOracle, + RinkebyGenesisHash: RinkebyCheckpointOracle, + GoerliGenesisHash: GoerliCheckpointOracle, +} + +var ( + // MainnetChainConfig is the chain parameters to run a node on the main network. + MainnetChainConfig = &ChainConfig{ + ChainID: big.NewInt(1), + HomesteadBlock: big.NewInt(1150000), + DAOForkBlock: big.NewInt(1920000), + DAOForkSupport: true, + EIP150Block: big.NewInt(2463000), + EIP150Hash: common.HexToHash("0x2086799aeebeae135c246c65021c82b4e15a2c451340993aacfd2751886514f0"), + EIP155Block: big.NewInt(2675000), + EIP158Block: big.NewInt(2675000), + ByzantiumBlock: big.NewInt(4370000), + ConstantinopleBlock: big.NewInt(7280000), + PetersburgBlock: big.NewInt(7280000), + IstanbulBlock: nil, + Ethash: new(EthashConfig), + } + + // MainnetTrustedCheckpoint contains the light client trusted checkpoint for the main network. + MainnetTrustedCheckpoint = &TrustedCheckpoint{ + SectionIndex: 253, + SectionHead: common.HexToHash("0xf35fabd036e2030196183bb70ae194f6ce1ea7b58559e3825c168f1df9c0a258"), + CHTRoot: common.HexToHash("0x8992849e2be3390696eaf66312626e484045501cd3ec207922c27a6a80a7bb07"), + BloomRoot: common.HexToHash("0xcc510b51ca4d73fb3fdf43208d73286f8f23817cdc31b8ea9f4de8d645f07df4"), + } + + // MainnetCheckpointOracle contains a set of configs for the main network oracle. + MainnetCheckpointOracle = &CheckpointOracleConfig{ + Address: common.HexToAddress("0x9a9070028361F7AAbeB3f2F2Dc07F82C4a98A02a"), + Signers: []common.Address{ + common.HexToAddress("0x1b2C260efc720BE89101890E4Db589b44E950527"), // Peter + common.HexToAddress("0x78d1aD571A1A09D60D9BBf25894b44e4C8859595"), // Martin + common.HexToAddress("0x286834935f4A8Cfb4FF4C77D5770C2775aE2b0E7"), // Zsolt + common.HexToAddress("0xb86e2B0Ab5A4B1373e40c51A7C712c70Ba2f9f8E"), // Gary + common.HexToAddress("0x0DF8fa387C602AE62559cC4aFa4972A7045d6707"), // Guillaume + }, + Threshold: 2, + } + + // TestnetChainConfig contains the chain parameters to run a node on the Ropsten test network. + TestnetChainConfig = &ChainConfig{ + ChainID: big.NewInt(3), + HomesteadBlock: big.NewInt(0), + DAOForkBlock: nil, + DAOForkSupport: true, + EIP150Block: big.NewInt(0), + EIP150Hash: common.HexToHash("0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d"), + EIP155Block: big.NewInt(10), + EIP158Block: big.NewInt(10), + ByzantiumBlock: big.NewInt(1700000), + ConstantinopleBlock: big.NewInt(4230000), + PetersburgBlock: big.NewInt(4939394), + IstanbulBlock: nil, + Ethash: new(EthashConfig), + } + + // TestnetTrustedCheckpoint contains the light client trusted checkpoint for the Ropsten test network. + TestnetTrustedCheckpoint = &TrustedCheckpoint{ + SectionIndex: 187, + SectionHead: common.HexToHash("0x7d6db64d8ec43303e4392fb726d2346f7231b246decca3d8140dd7e2c0d0b07d"), + CHTRoot: common.HexToHash("0xa5095e1a004a8642fb93ca682eb91e8f20ef5bce151e47404fbb68772d17705b"), + BloomRoot: common.HexToHash("0x90b28050f948ec6fb35b23a91d9aed38ce0c92d3cdd6e1d383c1bddf8b4071cf"), + } + + // TestnetCheckpointOracle contains a set of configs for the Ropsten test network oracle. + TestnetCheckpointOracle = &CheckpointOracleConfig{ + Address: common.HexToAddress("0xEF79475013f154E6A65b54cB2742867791bf0B84"), + Signers: []common.Address{ + common.HexToAddress("0x32162F3581E88a5f62e8A61892B42C46E2c18f7b"), // Peter + common.HexToAddress("0x78d1aD571A1A09D60D9BBf25894b44e4C8859595"), // Martin + common.HexToAddress("0x286834935f4A8Cfb4FF4C77D5770C2775aE2b0E7"), // Zsolt + common.HexToAddress("0xb86e2B0Ab5A4B1373e40c51A7C712c70Ba2f9f8E"), // Gary + common.HexToAddress("0x0DF8fa387C602AE62559cC4aFa4972A7045d6707"), // Guillaume + }, + Threshold: 2, + } + + // RinkebyChainConfig contains the chain parameters to run a node on the Rinkeby test network. + RinkebyChainConfig = &ChainConfig{ + ChainID: big.NewInt(4), + HomesteadBlock: big.NewInt(1), + DAOForkBlock: nil, + DAOForkSupport: true, + EIP150Block: big.NewInt(2), + EIP150Hash: common.HexToHash("0x9b095b36c15eaf13044373aef8ee0bd3a382a5abb92e402afa44b8249c3a90e9"), + EIP155Block: big.NewInt(3), + EIP158Block: big.NewInt(3), + ByzantiumBlock: big.NewInt(1035301), + ConstantinopleBlock: big.NewInt(3660663), + PetersburgBlock: big.NewInt(4321234), + IstanbulBlock: nil, + Clique: &CliqueConfig{ + Period: 15, + Epoch: 30000, + }, + } + + // RinkebyTrustedCheckpoint contains the light client trusted checkpoint for the Rinkeby test network. + RinkebyTrustedCheckpoint = &TrustedCheckpoint{ + SectionIndex: 148, + SectionHead: common.HexToHash("0x45918f4686732c2a3e80827e1bc39cdb6a27fa362ddfe1fdfb61c69a7f1df1a9"), + CHTRoot: common.HexToHash("0x8ac7046391fec14834a2a0183513937c0b5f696666545991477d24b067008961"), + BloomRoot: common.HexToHash("0xfe4b852517612d7da54bf7e9fc18861a83171a93c72583bb6a61893b74422168"), + } + + // RinkebyCheckpointOracle contains a set of configs for the Rinkeby test network oracle. + RinkebyCheckpointOracle = &CheckpointOracleConfig{ + Address: common.HexToAddress("0xebe8eFA441B9302A0d7eaECc277c09d20D684540"), + Signers: []common.Address{ + common.HexToAddress("0xd9c9cd5f6779558b6e0ed4e6acf6b1947e7fa1f3"), // Peter + common.HexToAddress("0x78d1aD571A1A09D60D9BBf25894b44e4C8859595"), // Martin + common.HexToAddress("0x286834935f4A8Cfb4FF4C77D5770C2775aE2b0E7"), // Zsolt + common.HexToAddress("0xb86e2B0Ab5A4B1373e40c51A7C712c70Ba2f9f8E"), // Gary + }, + Threshold: 2, + } + + // GoerliChainConfig contains the chain parameters to run a node on the Görli test network. + GoerliChainConfig = &ChainConfig{ + ChainID: big.NewInt(5), + HomesteadBlock: big.NewInt(0), + DAOForkBlock: nil, + DAOForkSupport: true, + EIP150Block: big.NewInt(0), + EIP155Block: big.NewInt(0), + EIP158Block: big.NewInt(0), + ByzantiumBlock: big.NewInt(0), + ConstantinopleBlock: big.NewInt(0), + PetersburgBlock: big.NewInt(0), + IstanbulBlock: nil, + Clique: &CliqueConfig{ + Period: 15, + Epoch: 30000, + }, + } + + // GoerliTrustedCheckpoint contains the light client trusted checkpoint for the Görli test network. + GoerliTrustedCheckpoint = &TrustedCheckpoint{ + SectionIndex: 32, + SectionHead: common.HexToHash("0x50eaedd8361fa9edd0ac2dec410310b9bdf67b963b60f3b1dce47f84b30670f9"), + CHTRoot: common.HexToHash("0x6504db73139f75ffa9102ae980e41b361cf3d5b66cea06c79cde9f457368820c"), + BloomRoot: common.HexToHash("0x7551ae027bb776252a20ded51ee2ff0cbfbd1d8d57261b9161cc1f2f80237001"), + } + + // GoerliCheckpointOracle contains a set of configs for the Goerli test network oracle. + GoerliCheckpointOracle = &CheckpointOracleConfig{ + Address: common.HexToAddress("0x18CA0E045F0D772a851BC7e48357Bcaab0a0795D"), + Signers: []common.Address{ + common.HexToAddress("0x4769bcaD07e3b938B7f43EB7D278Bc7Cb9efFb38"), // Peter + common.HexToAddress("0x78d1aD571A1A09D60D9BBf25894b44e4C8859595"), // Martin + common.HexToAddress("0x286834935f4A8Cfb4FF4C77D5770C2775aE2b0E7"), // Zsolt + common.HexToAddress("0xb86e2B0Ab5A4B1373e40c51A7C712c70Ba2f9f8E"), // Gary + common.HexToAddress("0x0DF8fa387C602AE62559cC4aFa4972A7045d6707"), // Guillaume + }, + Threshold: 2, + } + + // AllEthashProtocolChanges contains every protocol change (EIPs) introduced + // and accepted by the Ethereum core developers into the Ethash consensus. + // + // This configuration is intentionally not using keyed fields to force anyone + // adding flags to the config to also have to set these fields. + AllEthashProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, new(EthashConfig), nil} + + // AllCliqueProtocolChanges contains every protocol change (EIPs) introduced + // and accepted by the Ethereum core developers into the Clique consensus. + // + // This configuration is intentionally not using keyed fields to force anyone + // adding flags to the config to also have to set these fields. + AllCliqueProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, nil, &CliqueConfig{Period: 0, Epoch: 30000}} + + TestChainConfig = &ChainConfig{big.NewInt(1), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, new(EthashConfig), nil} + TestRules = TestChainConfig.Rules(new(big.Int)) +) + +// TrustedCheckpoint represents a set of post-processed trie roots (CHT and +// BloomTrie) associated with the appropriate section index and head hash. It is +// used to start light syncing from this checkpoint and avoid downloading the +// entire header chain while still being able to securely access old headers/logs. +type TrustedCheckpoint struct { + SectionIndex uint64 `json:"sectionIndex"` + SectionHead common.Hash `json:"sectionHead"` + CHTRoot common.Hash `json:"chtRoot"` + BloomRoot common.Hash `json:"bloomRoot"` +} + +// HashEqual returns an indicator comparing the itself hash with given one. +func (c *TrustedCheckpoint) HashEqual(hash common.Hash) bool { + if c.Empty() { + return hash == common.Hash{} + } + return c.Hash() == hash +} + +// Hash returns the hash of checkpoint's four key fields(index, sectionHead, chtRoot and bloomTrieRoot). +func (c *TrustedCheckpoint) Hash() common.Hash { + buf := make([]byte, 8+3*common.HashLength) + binary.BigEndian.PutUint64(buf, c.SectionIndex) + copy(buf[8:], c.SectionHead.Bytes()) + copy(buf[8+common.HashLength:], c.CHTRoot.Bytes()) + copy(buf[8+2*common.HashLength:], c.BloomRoot.Bytes()) + return crypto.Keccak256Hash(buf) +} + +// Empty returns an indicator whether the checkpoint is regarded as empty. +func (c *TrustedCheckpoint) Empty() bool { + return c.SectionHead == (common.Hash{}) || c.CHTRoot == (common.Hash{}) || c.BloomRoot == (common.Hash{}) +} + +// CheckpointOracleConfig represents a set of checkpoint contract(which acts as an oracle) +// config which used for light client checkpoint syncing. +type CheckpointOracleConfig struct { + Address common.Address `json:"address"` + Signers []common.Address `json:"signers"` + Threshold uint64 `json:"threshold"` +} + +// ChainConfig is the core config which determines the blockchain settings. +// +// ChainConfig is stored in the database on a per block basis. This means +// that any network, identified by its genesis block, can have its own +// set of configuration options. +type ChainConfig struct { + ChainID *big.Int `json:"chainId"` // chainId identifies the current chain and is used for replay protection + + HomesteadBlock *big.Int `json:"homesteadBlock,omitempty"` // Homestead switch block (nil = no fork, 0 = already homestead) + + DAOForkBlock *big.Int `json:"daoForkBlock,omitempty"` // TheDAO hard-fork switch block (nil = no fork) + DAOForkSupport bool `json:"daoForkSupport,omitempty"` // Whether the nodes supports or opposes the DAO hard-fork + + // EIP150 implements the Gas price changes (https://github.com/ethereum/EIPs/issues/150) + EIP150Block *big.Int `json:"eip150Block,omitempty"` // EIP150 HF block (nil = no fork) + EIP150Hash common.Hash `json:"eip150Hash,omitempty"` // EIP150 HF hash (needed for header only clients as only gas pricing changed) + + EIP155Block *big.Int `json:"eip155Block,omitempty"` // EIP155 HF block + EIP158Block *big.Int `json:"eip158Block,omitempty"` // EIP158 HF block + + ByzantiumBlock *big.Int `json:"byzantiumBlock,omitempty"` // Byzantium switch block (nil = no fork, 0 = already on byzantium) + ConstantinopleBlock *big.Int `json:"constantinopleBlock,omitempty"` // Constantinople switch block (nil = no fork, 0 = already activated) + PetersburgBlock *big.Int `json:"petersburgBlock,omitempty"` // Petersburg switch block (nil = same as Constantinople) + IstanbulBlock *big.Int `json:"istanbulBlock,omitempty"` // Istanbul switch block (nil = no fork, 0 = already on istanbul) + EWASMBlock *big.Int `json:"ewasmBlock,omitempty"` // EWASM switch block (nil = no fork, 0 = already activated) + + // Various consensus engines + Ethash *EthashConfig `json:"ethash,omitempty"` + Clique *CliqueConfig `json:"clique,omitempty"` +} + +// EthashConfig is the consensus engine configs for proof-of-work based sealing. +type EthashConfig struct{} + +// String implements the stringer interface, returning the consensus engine details. +func (c *EthashConfig) String() string { + return "ethash" +} + +// CliqueConfig is the consensus engine configs for proof-of-authority based sealing. +type CliqueConfig struct { + Period uint64 `json:"period"` // Number of seconds between blocks to enforce + Epoch uint64 `json:"epoch"` // Epoch length to reset votes and checkpoint +} + +// String implements the stringer interface, returning the consensus engine details. +func (c *CliqueConfig) String() string { + return "clique" +} + +// String implements the fmt.Stringer interface. +func (c *ChainConfig) String() string { + var engine interface{} + switch { + case c.Ethash != nil: + engine = c.Ethash + case c.Clique != nil: + engine = c.Clique + default: + engine = "unknown" + } + return fmt.Sprintf("{ChainID: %v Homestead: %v DAO: %v DAOSupport: %v EIP150: %v EIP155: %v EIP158: %v Byzantium: %v Constantinople: %v Petersburg: %v Istanbul: %v Engine: %v}", + c.ChainID, + c.HomesteadBlock, + c.DAOForkBlock, + c.DAOForkSupport, + c.EIP150Block, + c.EIP155Block, + c.EIP158Block, + c.ByzantiumBlock, + c.ConstantinopleBlock, + c.PetersburgBlock, + c.IstanbulBlock, + engine, + ) +} + +// IsHomestead returns whether num is either equal to the homestead block or greater. +func (c *ChainConfig) IsHomestead(num *big.Int) bool { + return isForked(c.HomesteadBlock, num) +} + +// IsDAOFork returns whether num is either equal to the DAO fork block or greater. +func (c *ChainConfig) IsDAOFork(num *big.Int) bool { + return isForked(c.DAOForkBlock, num) +} + +// IsEIP150 returns whether num is either equal to the EIP150 fork block or greater. +func (c *ChainConfig) IsEIP150(num *big.Int) bool { + return isForked(c.EIP150Block, num) +} + +// IsEIP155 returns whether num is either equal to the EIP155 fork block or greater. +func (c *ChainConfig) IsEIP155(num *big.Int) bool { + return isForked(c.EIP155Block, num) +} + +// IsEIP158 returns whether num is either equal to the EIP158 fork block or greater. +func (c *ChainConfig) IsEIP158(num *big.Int) bool { + return isForked(c.EIP158Block, num) +} + +// IsByzantium returns whether num is either equal to the Byzantium fork block or greater. +func (c *ChainConfig) IsByzantium(num *big.Int) bool { + return isForked(c.ByzantiumBlock, num) +} + +// IsConstantinople returns whether num is either equal to the Constantinople fork block or greater. +func (c *ChainConfig) IsConstantinople(num *big.Int) bool { + return isForked(c.ConstantinopleBlock, num) +} + +// IsPetersburg returns whether num is either +// - equal to or greater than the PetersburgBlock fork block, +// - OR is nil, and Constantinople is active +func (c *ChainConfig) IsPetersburg(num *big.Int) bool { + return isForked(c.PetersburgBlock, num) || c.PetersburgBlock == nil && isForked(c.ConstantinopleBlock, num) +} + +// IsIstanbul returns whether num is either equal to the Istanbul fork block or greater. +func (c *ChainConfig) IsIstanbul(num *big.Int) bool { + return isForked(c.IstanbulBlock, num) +} + +// IsEWASM returns whether num represents a block number after the EWASM fork +func (c *ChainConfig) IsEWASM(num *big.Int) bool { + return isForked(c.EWASMBlock, num) +} + +// CheckCompatible checks whether scheduled fork transitions have been imported +// with a mismatching chain configuration. +func (c *ChainConfig) CheckCompatible(newcfg *ChainConfig, height uint64) *ConfigCompatError { + bhead := new(big.Int).SetUint64(height) + + // Iterate checkCompatible to find the lowest conflict. + var lasterr *ConfigCompatError + for { + err := c.checkCompatible(newcfg, bhead) + if err == nil || (lasterr != nil && err.RewindTo == lasterr.RewindTo) { + break + } + lasterr = err + bhead.SetUint64(err.RewindTo) + } + return lasterr +} + +func (c *ChainConfig) checkCompatible(newcfg *ChainConfig, head *big.Int) *ConfigCompatError { + if isForkIncompatible(c.HomesteadBlock, newcfg.HomesteadBlock, head) { + return newCompatError("Homestead fork block", c.HomesteadBlock, newcfg.HomesteadBlock) + } + if isForkIncompatible(c.DAOForkBlock, newcfg.DAOForkBlock, head) { + return newCompatError("DAO fork block", c.DAOForkBlock, newcfg.DAOForkBlock) + } + if c.IsDAOFork(head) && c.DAOForkSupport != newcfg.DAOForkSupport { + return newCompatError("DAO fork support flag", c.DAOForkBlock, newcfg.DAOForkBlock) + } + if isForkIncompatible(c.EIP150Block, newcfg.EIP150Block, head) { + return newCompatError("EIP150 fork block", c.EIP150Block, newcfg.EIP150Block) + } + if isForkIncompatible(c.EIP155Block, newcfg.EIP155Block, head) { + return newCompatError("EIP155 fork block", c.EIP155Block, newcfg.EIP155Block) + } + if isForkIncompatible(c.EIP158Block, newcfg.EIP158Block, head) { + return newCompatError("EIP158 fork block", c.EIP158Block, newcfg.EIP158Block) + } + if c.IsEIP158(head) && !configNumEqual(c.ChainID, newcfg.ChainID) { + return newCompatError("EIP158 chain ID", c.EIP158Block, newcfg.EIP158Block) + } + if isForkIncompatible(c.ByzantiumBlock, newcfg.ByzantiumBlock, head) { + return newCompatError("Byzantium fork block", c.ByzantiumBlock, newcfg.ByzantiumBlock) + } + if isForkIncompatible(c.ConstantinopleBlock, newcfg.ConstantinopleBlock, head) { + return newCompatError("Constantinople fork block", c.ConstantinopleBlock, newcfg.ConstantinopleBlock) + } + if isForkIncompatible(c.PetersburgBlock, newcfg.PetersburgBlock, head) { + return newCompatError("Petersburg fork block", c.PetersburgBlock, newcfg.PetersburgBlock) + } + if isForkIncompatible(c.IstanbulBlock, newcfg.IstanbulBlock, head) { + return newCompatError("Istanbul fork block", c.IstanbulBlock, newcfg.IstanbulBlock) + } + if isForkIncompatible(c.EWASMBlock, newcfg.EWASMBlock, head) { + return newCompatError("ewasm fork block", c.EWASMBlock, newcfg.EWASMBlock) + } + return nil +} + +// isForkIncompatible returns true if a fork scheduled at s1 cannot be rescheduled to +// block s2 because head is already past the fork. +func isForkIncompatible(s1, s2, head *big.Int) bool { + return (isForked(s1, head) || isForked(s2, head)) && !configNumEqual(s1, s2) +} + +// isForked returns whether a fork scheduled at block s is active at the given head block. +func isForked(s, head *big.Int) bool { + if s == nil || head == nil { + return false + } + return s.Cmp(head) <= 0 +} + +func configNumEqual(x, y *big.Int) bool { + if x == nil { + return y == nil + } + if y == nil { + return x == nil + } + return x.Cmp(y) == 0 +} + +// ConfigCompatError is raised if the locally-stored blockchain is initialised with a +// ChainConfig that would alter the past. +type ConfigCompatError struct { + What string + // block numbers of the stored and new configurations + StoredConfig, NewConfig *big.Int + // the block number to which the local chain must be rewound to correct the error + RewindTo uint64 +} + +func newCompatError(what string, storedblock, newblock *big.Int) *ConfigCompatError { + var rew *big.Int + switch { + case storedblock == nil: + rew = newblock + case newblock == nil || storedblock.Cmp(newblock) < 0: + rew = storedblock + default: + rew = newblock + } + err := &ConfigCompatError{what, storedblock, newblock, 0} + if rew != nil && rew.Sign() > 0 { + err.RewindTo = rew.Uint64() - 1 + } + return err +} + +func (err *ConfigCompatError) Error() string { + return fmt.Sprintf("mismatching %s in database (have %d, want %d, rewindto %d)", err.What, err.StoredConfig, err.NewConfig, err.RewindTo) +} + +// Rules wraps ChainConfig and is merely syntactic sugar or can be used for functions +// that do not have or require information about the block. +// +// Rules is a one time interface meaning that it shouldn't be used in between transition +// phases. +type Rules struct { + ChainID *big.Int + IsHomestead, IsEIP150, IsEIP155, IsEIP158 bool + IsByzantium, IsConstantinople, IsPetersburg, IsIstanbul bool +} + +// Rules ensures c's ChainID is not nil. +func (c *ChainConfig) Rules(num *big.Int) Rules { + chainID := c.ChainID + if chainID == nil { + chainID = new(big.Int) + } + return Rules{ + ChainID: new(big.Int).Set(chainID), + IsHomestead: c.IsHomestead(num), + IsEIP150: c.IsEIP150(num), + IsEIP155: c.IsEIP155(num), + IsEIP158: c.IsEIP158(num), + IsByzantium: c.IsByzantium(num), + IsConstantinople: c.IsConstantinople(num), + IsPetersburg: c.IsPetersburg(num), + IsIstanbul: c.IsIstanbul(num), + } +} |