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Diffstat (limited to 'params/config.go')
| -rw-r--r-- | params/config.go | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/params/config.go b/params/config.go new file mode 100644 index 000000000..d63236ef8 --- /dev/null +++ b/params/config.go @@ -0,0 +1,112 @@ +// 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 ( + "math/big" + + "github.com/ethereum/go-ethereum/common" +) + +// 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"` // Chain id identifies the current chain and is used for replay protection + + HomesteadBlock *big.Int `json:"homesteadBlock"` // Homestead switch block (nil = no fork, 0 = already homestead) + DAOForkBlock *big.Int `json:"daoForkBlock"` // TheDAO hard-fork switch block (nil = no fork) + DAOForkSupport bool `json:"daoForkSupport"` // 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"` // EIP150 HF block (nil = no fork) + EIP150Hash common.Hash `json:"eip150Hash"` // EIP150 HF hash (fast sync aid) + + EIP155Block *big.Int `json:"eip155Block"` // EIP155 HF block + EIP158Block *big.Int `json:"eip158Block"` // EIP158 HF block +} + +var ( + TestChainConfig = &ChainConfig{big.NewInt(1), new(big.Int), new(big.Int), true, new(big.Int), common.Hash{}, new(big.Int), new(big.Int)} + TestRules = TestChainConfig.Rules(new(big.Int)) +) + +// IsHomestead returns whether num is either equal to the homestead block or greater. +func (c *ChainConfig) IsHomestead(num *big.Int) bool { + if c.HomesteadBlock == nil || num == nil { + return false + } + return num.Cmp(c.HomesteadBlock) >= 0 +} + +// GasTable returns the gas table corresponding to the current phase (homestead or homestead reprice). +// +// The returned GasTable's fields shouldn't, under any circumstances, be changed. +func (c *ChainConfig) GasTable(num *big.Int) GasTable { + if num == nil { + return GasTableHomestead + } + + switch { + case c.EIP158Block != nil && num.Cmp(c.EIP158Block) >= 0: + return GasTableEIP158 + case c.EIP150Block != nil && num.Cmp(c.EIP150Block) >= 0: + return GasTableHomesteadGasRepriceFork + default: + return GasTableHomestead + } +} + +func (c *ChainConfig) IsEIP150(num *big.Int) bool { + if c.EIP150Block == nil || num == nil { + return false + } + return num.Cmp(c.EIP150Block) >= 0 + +} + +func (c *ChainConfig) IsEIP155(num *big.Int) bool { + if c.EIP155Block == nil || num == nil { + return false + } + return num.Cmp(c.EIP155Block) >= 0 + +} + +func (c *ChainConfig) IsEIP158(num *big.Int) bool { + if c.EIP158Block == nil || num == nil { + return false + } + return num.Cmp(c.EIP158Block) >= 0 + +} + +// Rules wraps ChainConfig and is merely syntatic 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 +} + +func (c *ChainConfig) Rules(num *big.Int) Rules { + return Rules{ChainId: new(big.Int).Set(c.ChainId), IsHomestead: c.IsHomestead(num), IsEIP150: c.IsEIP150(num), IsEIP155: c.IsEIP155(num), IsEIP158: c.IsEIP158(num)} +} |