path: root/cmd/geth/dao_test.go

// Copyright 2016 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.

package main

import (
    "io/ioutil"
    "math/big"
    "os"
    "path/filepath"
    "testing"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core/rawdb"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/params"
)

// Genesis block for nodes which don't care about the DAO fork (i.e. not configured)
var daoOldGenesis = `{
    "alloc"      : {},
    "coinbase"   : "0x0000000000000000000000000000000000000000",
    "difficulty" : "0x20000",
    "extraData"  : "",
    "gasLimit"   : "0x2fefd8",
    "nonce"      : "0x0000000000000042",
    "mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
    "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
    "timestamp"  : "0x00",
    "config"     : {}
}`

// Genesis block for nodes which actively oppose the DAO fork
var daoNoForkGenesis = `{
    "alloc"      : {},
    "coinbase"   : "0x0000000000000000000000000000000000000000",
    "difficulty" : "0x20000",
    "extraData"  : "",
    "gasLimit"   : "0x2fefd8",
    "nonce"      : "0x0000000000000042",
    "mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
    "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
    "timestamp"  : "0x00",
    "config"     : {
        "daoForkBlock"   : 314,
        "daoForkSupport" : false
    }
}`

// Genesis block for nodes which actively support the DAO fork
var daoProForkGenesis = `{
    "alloc"      : {},
    "coinbase"   : "0x0000000000000000000000000000000000000000",
    "difficulty" : "0x20000",
    "extraData"  : "",
    "gasLimit"   : "0x2fefd8",
    "nonce"      : "0x0000000000000042",
    "mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
    "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
    "timestamp"  : "0x00",
    "config"     : {
        "daoForkBlock"   : 314,
        "daoForkSupport" : true
    }
}`

var daoGenesisHash = common.HexToHash("5e1fc79cb4ffa4739177b5408045cd5d51c6cf766133f23f7cd72ee1f8d790e0")
var daoGenesisForkBlock = big.NewInt(314)

// TestDAOForkBlockNewChain tests that the DAO hard-fork number and the nodes support/opposition is correctly
// set in the database after various initialization procedures and invocations.
func TestDAOForkBlockNewChain(t *testing.T) {
    for i, arg := range []struct {
        genesis     string
        expectBlock *big.Int
        expectVote  bool
    }{
        // Test DAO Default Mainnet
        {"", params.MainnetChainConfig.DAOForkBlock, true},
        // test DAO Init Old Privnet
        {daoOldGenesis, nil, false},
        // test DAO Default No Fork Privnet
        {daoNoForkGenesis, daoGenesisForkBlock, false},
        // test DAO Default Pro Fork Privnet
        {daoProForkGenesis, daoGenesisForkBlock, true},
    } {
        testDAOForkBlockNewChain(t, i, arg.genesis, arg.expectBlock, arg.expectVote)
    }
}

func testDAOForkBlockNewChain(t *testing.T, test int, genesis string, expectBlock *big.Int, expectVote bool) {
    // Create a temporary data directory to use and inspect later
    datadir := tmpdir(t)
    defer os.RemoveAll(datadir)

    // Start a Geth instance with the requested flags set and immediately terminate
    if genesis != "" {
        json := filepath.Join(datadir, "genesis.json")
        if err := ioutil.WriteFile(json, []byte(genesis), 0600); err != nil {
            t.Fatalf("test %d: failed to write genesis file: %v", test, err)
        }
        runGeth(t, "--datadir", datadir, "init", json).WaitExit()
    } else {
        // Force chain initialization
        args := []string{"--port", "0", "--maxpeers", "0", "--nodiscover", "--nat", "none", "--ipcdisable", "--datadir", datadir}
        geth := runGeth(t, append(args, []string{"--exec", "2+2", "console"}...)...)
        geth.WaitExit()
    }
    // Retrieve the DAO config flag from the database
    path := filepath.Join(datadir, "geth", "chaindata")
    db, err := ethdb.NewLDBDatabase(path, 0, 0)
    if err != nil {
        t.Fatalf("test %d: failed to open test database: %v", test, err)
    }
    defer db.Close()

    genesisHash := common.HexToHash("0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3")
    if genesis != "" {
        genesisHash = daoGenesisHash
    }
    config := rawdb.ReadChainConfig(db, genesisHash)
    if config == nil {
        t.Errorf("test %d: failed to retrieve chain config: %v", test, err)
        return // we want to return here, the other checks can't make it past this point (nil panic).
    }
    // Validate the DAO hard-fork block number against the expected value
    if config.DAOForkBlock == nil {
        if expectBlock != nil {
            t.Errorf("test %d: dao hard-fork block mismatch: have nil, want %v", test, expectBlock)
        }
    } else if expectBlock == nil {
        t.Errorf("test %d: dao hard-fork block mismatch: have %v, want nil", test, config.DAOForkBlock)
    } else if config.DAOForkBlock.Cmp(expectBlock) != 0 {
        t.Errorf("test %d: dao hard-fork block mismatch: have %v, want %v", test, config.DAOForkBlock, expectBlock)
    }
    if config.DAOForkSupport != expectVote {
        t.Errorf("test %d: dao hard-fork support mismatch: have %v, want %v", test, config.DAOForkSupport, expectVote)
    }
}