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cmd, core, eth, miner, params, tests: finalize the DAO fork
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| // 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 core | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "math/big" | ||
|
|
||
| "github.com/ethereum/go-ethereum/core/state" | ||
| "github.com/ethereum/go-ethereum/core/types" | ||
| "github.com/ethereum/go-ethereum/params" | ||
| ) | ||
|
|
||
| // ValidateDAOHeaderExtraData validates the extra-data field of a block header to | ||
| // ensure it conforms to DAO hard-fork rules. | ||
| // | ||
| // DAO hard-fork extension to the header validity: | ||
| // a) if the node is no-fork, do not accept blocks in the [fork, fork+10) range | ||
| // with the fork specific extra-data set | ||
| // b) if the node is pro-fork, require blocks in the specific range to have the | ||
| // unique extra-data set. | ||
| func ValidateDAOHeaderExtraData(config *ChainConfig, header *types.Header) error { | ||
| // Short circuit validation if the node doesn't care about the DAO fork | ||
| if config.DAOForkBlock == nil { | ||
| return nil | ||
| } | ||
| // Make sure the block is within the fork's modified extra-data range | ||
| limit := new(big.Int).Add(config.DAOForkBlock, params.DAOForkExtraRange) | ||
| if header.Number.Cmp(config.DAOForkBlock) < 0 || header.Number.Cmp(limit) >= 0 { | ||
| return nil | ||
| } | ||
| // Depending whether we support or oppose the fork, validate the extra-data contents | ||
| if config.DAOForkSupport { | ||
| if bytes.Compare(header.Extra, params.DAOForkBlockExtra) != 0 { | ||
| return ValidationError("DAO pro-fork bad block extra-data: 0x%x", header.Extra) | ||
| } | ||
| } else { | ||
| if bytes.Compare(header.Extra, params.DAOForkBlockExtra) == 0 { | ||
| return ValidationError("DAO no-fork bad block extra-data: 0x%x", header.Extra) | ||
| } | ||
| } | ||
| // All ok, header has the same extra-data we expect | ||
| return nil | ||
| } | ||
|
|
||
| // ApplyDAOHardFork modifies the state database according to the DAO hard-fork | ||
| // rules, transferring all balances of a set of DAO accounts to a single refund | ||
| // contract. | ||
| func ApplyDAOHardFork(statedb *state.StateDB) { | ||
| // Retrieve the contract to refund balances into | ||
| refund := statedb.GetOrNewStateObject(params.DAORefundContract) | ||
|
|
||
| // Move every DAO account and extra-balance account funds into the refund contract | ||
| for _, addr := range params.DAODrainList { | ||
| if account := statedb.GetStateObject(addr); account != nil { | ||
| refund.AddBalance(account.Balance()) | ||
| account.SetBalance(new(big.Int)) | ||
| } | ||
| } | ||
| } |
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