path: root/les/odr_test.go

// 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 les

import (
    "bytes"
    "context"
    "math/big"
    "testing"
    "time"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/common/math"
    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/core/rawdb"
    "github.com/ethereum/go-ethereum/core/state"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/core/vm"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/light"
    "github.com/ethereum/go-ethereum/params"
    "github.com/ethereum/go-ethereum/rlp"
)

type odrTestFn func(ctx context.Context, db ethdb.Database, config *params.ChainConfig, bc *core.BlockChain, lc *light.LightChain, bhash common.Hash) []byte

func TestOdrGetBlockLes1(t *testing.T) { testOdr(t, 1, 1, odrGetBlock) }

func TestOdrGetBlockLes2(t *testing.T) { testOdr(t, 2, 1, odrGetBlock) }

func odrGetBlock(ctx context.Context, db ethdb.Database, config *params.ChainConfig, bc *core.BlockChain, lc *light.LightChain, bhash common.Hash) []byte {
    var block *types.Block
    if bc != nil {
        block = bc.GetBlockByHash(bhash)
    } else {
        block, _ = lc.GetBlockByHash(ctx, bhash)
    }
    if block == nil {
        return nil
    }
    rlp, _ := rlp.EncodeToBytes(block)
    return rlp
}

func TestOdrGetReceiptsLes1(t *testing.T) { testOdr(t, 1, 1, odrGetReceipts) }

func TestOdrGetReceiptsLes2(t *testing.T) { testOdr(t, 2, 1, odrGetReceipts) }

func odrGetReceipts(ctx context.Context, db ethdb.Database, config *params.ChainConfig, bc *core.BlockChain, lc *light.LightChain, bhash common.Hash) []byte {
    var receipts types.Receipts
    if bc != nil {
        if number := rawdb.ReadHeaderNumber(db, bhash); number != nil {
            receipts = rawdb.ReadReceipts(db, bhash, *number)
        }
    } else {
        if number := rawdb.ReadHeaderNumber(db, bhash); number != nil {
            receipts, _ = light.GetBlockReceipts(ctx, lc.Odr(), bhash, *number)
        }
    }
    if receipts == nil {
        return nil
    }
    rlp, _ := rlp.EncodeToBytes(receipts)
    return rlp
}

func TestOdrAccountsLes1(t *testing.T) { testOdr(t, 1, 1, odrAccounts) }

func TestOdrAccountsLes2(t *testing.T) { testOdr(t, 2, 1, odrAccounts) }

func odrAccounts(ctx context.Context, db ethdb.Database, config *params.ChainConfig, bc *core.BlockChain, lc *light.LightChain, bhash common.Hash) []byte {
    dummyAddr := common.HexToAddress("1234567812345678123456781234567812345678")
    acc := []common.Address{testBankAddress, acc1Addr, acc2Addr, dummyAddr}

    var (
        res []byte
        st  *state.StateDB
        err error
    )
    for _, addr := range acc {
        if bc != nil {
            header := bc.GetHeaderByHash(bhash)
            st, err = state.New(header.Root, state.NewDatabase(db))
        } else {
            header := lc.GetHeaderByHash(bhash)
            st = light.NewState(ctx, header, lc.Odr())
        }
        if err == nil {
            bal := st.GetBalance(addr)
            rlp, _ := rlp.EncodeToBytes(bal)
            res = append(res, rlp...)
        }
    }
    return res
}

func TestOdrContractCallLes1(t *testing.T) { testOdr(t, 1, 2, odrContractCall) }

func TestOdrContractCallLes2(t *testing.T) { testOdr(t, 2, 2, odrContractCall) }

type callmsg struct {
    types.Message
}

func (callmsg) CheckNonce() bool { return false }

func odrContractCall(ctx context.Context, db ethdb.Database, config *params.ChainConfig, bc *core.BlockChain, lc *light.LightChain, bhash common.Hash) []byte {
    data := common.Hex2Bytes("60CD26850000000000000000000000000000000000000000000000000000000000000000")

    var res []byte
    for i := 0; i < 3; i++ {
        data[35] = byte(i)
        if bc != nil {
            header := bc.GetHeaderByHash(bhash)
            statedb, err := state.New(header.Root, state.NewDatabase(db))

            if err == nil {
                from := statedb.GetOrNewStateObject(testBankAddress)
                from.SetBalance(math.MaxBig256)

                msg := callmsg{types.NewMessage(from.Address(), &testContractAddr, 0, new(big.Int), 100000, new(big.Int), data, false)}

                context := core.NewEVMContext(msg, header, bc, nil)
                vmenv := vm.NewEVM(context, statedb, config, vm.Config{})

                //vmenv := core.NewEnv(statedb, config, bc, msg, header, vm.Config{})
                gp := new(core.GasPool).AddGas(math.MaxUint64)
                ret, _, _, _ := core.ApplyMessage(vmenv, msg, gp)
                res = append(res, ret...)
            }
        } else {
            header := lc.GetHeaderByHash(bhash)
            state := light.NewState(ctx, header, lc.Odr())
            state.SetBalance(testBankAddress, math.MaxBig256)
            msg := callmsg{types.NewMessage(testBankAddress, &testContractAddr, 0, new(big.Int), 100000, new(big.Int), data, false)}
            context := core.NewEVMContext(msg, header, lc, nil)
            vmenv := vm.NewEVM(context, state, config, vm.Config{})
            gp := new(core.GasPool).AddGas(math.MaxUint64)
            ret, _, _, _ := core.ApplyMessage(vmenv, msg, gp)
            if state.Error() == nil {
                res = append(res, ret...)
            }
        }
    }
    return res
}

// testOdr tests odr requests whose validation guaranteed by block headers.
func testOdr(t *testing.T, protocol int, expFail uint64, fn odrTestFn) {
    // Assemble the test environment
    server, client, tearDown := newClientServerEnv(t, 4, protocol, nil, true)
    defer tearDown()
    client.pm.synchronise(client.rPeer)

    test := func(expFail uint64) {
        for i := uint64(0); i <= server.pm.blockchain.CurrentHeader().Number.Uint64(); i++ {
            bhash := rawdb.ReadCanonicalHash(server.db, i)
            b1 := fn(light.NoOdr, server.db, server.pm.chainConfig, server.pm.blockchain.(*core.BlockChain), nil, bhash)

            ctx, cancel := context.WithTimeout(context.Background(), 200*time.Millisecond)
            defer cancel()
            b2 := fn(ctx, client.db, client.pm.chainConfig, nil, client.pm.blockchain.(*light.LightChain), bhash)

            eq := bytes.Equal(b1, b2)
            exp := i < expFail
            if exp && !eq {
                t.Errorf("odr mismatch")
            }
            if !exp && eq {
                t.Errorf("unexpected odr match")
            }
        }
    }
    // temporarily remove peer to test odr fails
    // expect retrievals to fail (except genesis block) without a les peer
    client.peers.Unregister(client.rPeer.id)
    time.Sleep(time.Millisecond * 10) // ensure that all peerSetNotify callbacks are executed
    test(expFail)
    // expect all retrievals to pass
    client.peers.Register(client.rPeer)
    time.Sleep(time.Millisecond * 10) // ensure that all peerSetNotify callbacks are executed
    client.peers.lock.Lock()
    client.rPeer.hasBlock = func(common.Hash, uint64, bool) bool { return true }
    client.peers.lock.Unlock()
    test(5)
    // still expect all retrievals to pass, now data should be cached locally
    client.peers.Unregister(client.rPeer.id)
    time.Sleep(time.Millisecond * 10) // ensure that all peerSetNotify callbacks are executed
    test(5)
}