forked from cerc-io/plugeth
37dd9086ec
This commit solves several issues concerning the genesis block: * Genesis/ChainConfig loading was handled by cmd/geth code. This left library users in the cold. They could specify a JSON-encoded string and overwrite the config, but didn't get any of the additional checks performed by geth. * Decoding and writing of genesis JSON was conflated in WriteGenesisBlock. This made it a lot harder to embed the genesis block into the forthcoming config file loader. This commit changes things so there is a single Genesis type that represents genesis blocks. All uses of Write*Genesis* are changed to use the new type instead. * If the chain config supplied by the user was incompatible with the current chain (i.e. the chain had already advanced beyond a scheduled fork), it got overwritten. This is not an issue in practice because previous forks have always had the highest total difficulty. It might matter in the future though. The new code reverts the local chain to the point of the fork when upgrading configuration. The change to genesis block data removes compression library dependencies from package core.
136 lines
6.1 KiB
Go
136 lines
6.1 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package core
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import (
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"math/big"
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"testing"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/pow"
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)
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// Tests that DAO-fork enabled clients can properly filter out fork-commencing
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// blocks based on their extradata fields.
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func TestDAOForkRangeExtradata(t *testing.T) {
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forkBlock := big.NewInt(32)
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// Generate a common prefix for both pro-forkers and non-forkers
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db, _ := ethdb.NewMemDatabase()
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gspec := new(Genesis)
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genesis := gspec.MustCommit(db)
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prefix, _ := GenerateChain(params.TestChainConfig, genesis, db, int(forkBlock.Int64()-1), func(i int, gen *BlockGen) {})
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// Create the concurrent, conflicting two nodes
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proDb, _ := ethdb.NewMemDatabase()
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gspec.MustCommit(proDb)
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proConf := ¶ms.ChainConfig{HomesteadBlock: big.NewInt(0), DAOForkBlock: forkBlock, DAOForkSupport: true}
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proBc, _ := NewBlockChain(proDb, proConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
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conDb, _ := ethdb.NewMemDatabase()
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gspec.MustCommit(conDb)
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conConf := ¶ms.ChainConfig{HomesteadBlock: big.NewInt(0), DAOForkBlock: forkBlock, DAOForkSupport: false}
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conBc, _ := NewBlockChain(conDb, conConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
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if _, err := proBc.InsertChain(prefix); err != nil {
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t.Fatalf("pro-fork: failed to import chain prefix: %v", err)
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}
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if _, err := conBc.InsertChain(prefix); err != nil {
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t.Fatalf("con-fork: failed to import chain prefix: %v", err)
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}
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// Try to expand both pro-fork and non-fork chains iteratively with other camp's blocks
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for i := int64(0); i < params.DAOForkExtraRange.Int64(); i++ {
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// Create a pro-fork block, and try to feed into the no-fork chain
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db, _ = ethdb.NewMemDatabase()
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gspec.MustCommit(db)
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bc, _ := NewBlockChain(db, conConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
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blocks := conBc.GetBlocksFromHash(conBc.CurrentBlock().Hash(), int(conBc.CurrentBlock().NumberU64()+1))
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for j := 0; j < len(blocks)/2; j++ {
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blocks[j], blocks[len(blocks)-1-j] = blocks[len(blocks)-1-j], blocks[j]
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}
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if _, err := bc.InsertChain(blocks); err != nil {
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t.Fatalf("failed to import contra-fork chain for expansion: %v", err)
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}
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blocks, _ = GenerateChain(proConf, conBc.CurrentBlock(), db, 1, func(i int, gen *BlockGen) {})
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if _, err := conBc.InsertChain(blocks); err == nil {
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t.Fatalf("contra-fork chain accepted pro-fork block: %v", blocks[0])
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}
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// Create a proper no-fork block for the contra-forker
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blocks, _ = GenerateChain(conConf, conBc.CurrentBlock(), db, 1, func(i int, gen *BlockGen) {})
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if _, err := conBc.InsertChain(blocks); err != nil {
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t.Fatalf("contra-fork chain didn't accepted no-fork block: %v", err)
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}
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// Create a no-fork block, and try to feed into the pro-fork chain
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db, _ = ethdb.NewMemDatabase()
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gspec.MustCommit(db)
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bc, _ = NewBlockChain(db, proConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
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blocks = proBc.GetBlocksFromHash(proBc.CurrentBlock().Hash(), int(proBc.CurrentBlock().NumberU64()+1))
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for j := 0; j < len(blocks)/2; j++ {
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blocks[j], blocks[len(blocks)-1-j] = blocks[len(blocks)-1-j], blocks[j]
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}
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if _, err := bc.InsertChain(blocks); err != nil {
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t.Fatalf("failed to import pro-fork chain for expansion: %v", err)
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}
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blocks, _ = GenerateChain(conConf, proBc.CurrentBlock(), db, 1, func(i int, gen *BlockGen) {})
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if _, err := proBc.InsertChain(blocks); err == nil {
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t.Fatalf("pro-fork chain accepted contra-fork block: %v", blocks[0])
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}
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// Create a proper pro-fork block for the pro-forker
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blocks, _ = GenerateChain(proConf, proBc.CurrentBlock(), db, 1, func(i int, gen *BlockGen) {})
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if _, err := proBc.InsertChain(blocks); err != nil {
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t.Fatalf("pro-fork chain didn't accepted pro-fork block: %v", err)
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}
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}
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// Verify that contra-forkers accept pro-fork extra-datas after forking finishes
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db, _ = ethdb.NewMemDatabase()
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gspec.MustCommit(db)
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bc, _ := NewBlockChain(db, conConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
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blocks := conBc.GetBlocksFromHash(conBc.CurrentBlock().Hash(), int(conBc.CurrentBlock().NumberU64()+1))
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for j := 0; j < len(blocks)/2; j++ {
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blocks[j], blocks[len(blocks)-1-j] = blocks[len(blocks)-1-j], blocks[j]
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}
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if _, err := bc.InsertChain(blocks); err != nil {
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t.Fatalf("failed to import contra-fork chain for expansion: %v", err)
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}
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blocks, _ = GenerateChain(proConf, conBc.CurrentBlock(), db, 1, func(i int, gen *BlockGen) {})
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if _, err := conBc.InsertChain(blocks); err != nil {
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t.Fatalf("contra-fork chain didn't accept pro-fork block post-fork: %v", err)
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}
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// Verify that pro-forkers accept contra-fork extra-datas after forking finishes
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db, _ = ethdb.NewMemDatabase()
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gspec.MustCommit(db)
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bc, _ = NewBlockChain(db, proConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
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blocks = proBc.GetBlocksFromHash(proBc.CurrentBlock().Hash(), int(proBc.CurrentBlock().NumberU64()+1))
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for j := 0; j < len(blocks)/2; j++ {
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blocks[j], blocks[len(blocks)-1-j] = blocks[len(blocks)-1-j], blocks[j]
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}
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if _, err := bc.InsertChain(blocks); err != nil {
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t.Fatalf("failed to import pro-fork chain for expansion: %v", err)
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}
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blocks, _ = GenerateChain(conConf, proBc.CurrentBlock(), db, 1, func(i int, gen *BlockGen) {})
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if _, err := proBc.InsertChain(blocks); err != nil {
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t.Fatalf("pro-fork chain didn't accept contra-fork block post-fork: %v", err)
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}
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}
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