Merge pull request #10246 from filecoin-project/steb/fix-eth-get-code-none
fix: eth: correctly handle ethGetCode ege-cases
This commit is contained in:
commit
7b959ab39c
@ -628,6 +628,11 @@ workflows:
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suite: itest-eth_block_hash
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target: "./itests/eth_block_hash_test.go"
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- test:
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name: test-itest-eth_bytecode
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suite: itest-eth_bytecode
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target: "./itests/eth_bytecode_test.go"
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- test:
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name: test-itest-eth_config
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suite: itest-eth_config
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74
itests/eth_bytecode_test.go
Normal file
74
itests/eth_bytecode_test.go
Normal file
@ -0,0 +1,74 @@
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package itests
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import (
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"context"
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"encoding/hex"
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"os"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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"github.com/filecoin-project/lotus/chain/types"
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"github.com/filecoin-project/lotus/itests/kit"
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)
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// TestGetCode ensures that GetCode returns the correct results for:
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// 1. Placeholders.
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// 2. Non-existent actors.
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// 3. Normal EVM actors.
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// 4. Self-destructed EVM actors.
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func TestGetCode(t *testing.T) {
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kit.QuietMiningLogs()
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blockTime := 100 * time.Millisecond
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client, _, ens := kit.EnsembleMinimal(t, kit.MockProofs(), kit.ThroughRPC())
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ens.InterconnectAll().BeginMining(blockTime)
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ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
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defer cancel()
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// Accounts should have empty code.
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{
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// A random eth address should have no code.
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_, ethAddr, filAddr := client.EVM().NewAccount()
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bytecode, err := client.EVM().EthGetCode(ctx, ethAddr, "latest")
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require.NoError(t, err)
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require.Empty(t, bytecode)
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// send some funds to the account.
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kit.SendFunds(ctx, t, client, filAddr, types.FromFil(10))
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// The code should still be empty, target is now a placeholder.
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bytecode, err = client.EVM().EthGetCode(ctx, ethAddr, "latest")
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require.NoError(t, err)
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require.Empty(t, bytecode)
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}
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// Check contract code.
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{
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// install a contract
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contractHex, err := os.ReadFile("./contracts/SelfDestruct.hex")
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require.NoError(t, err)
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contract, err := hex.DecodeString(string(contractHex))
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require.NoError(t, err)
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createReturn := client.EVM().DeployContract(ctx, client.DefaultKey.Address, contract)
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contractAddr := createReturn.EthAddress
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contractFilAddr := *createReturn.RobustAddress
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// The newly deployed contract should not be empty.
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bytecode, err := client.EVM().EthGetCode(ctx, contractAddr, "latest")
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require.NoError(t, err)
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require.NotEmpty(t, bytecode)
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// Destroy it.
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_, _, err = client.EVM().InvokeContractByFuncName(ctx, client.DefaultKey.Address, contractFilAddr, "destroy()", nil)
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require.NoError(t, err)
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// The code should be empty again.
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bytecode, err = client.EVM().EthGetCode(ctx, contractAddr, "latest")
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require.NoError(t, err)
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require.Empty(t, bytecode)
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}
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}
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@ -64,7 +64,7 @@ func (e *EVM) DeployContractWithValue(ctx context.Context, sender address.Addres
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require.NoError(err)
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e.t.Log("waiting for message to execute")
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wait, err := e.StateWaitMsg(ctx, smsg.Cid(), 0, 0, false)
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wait, err := e.StateWaitMsg(ctx, smsg.Cid(), 3, 0, false)
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require.NoError(err)
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require.True(wait.Receipt.ExitCode.IsSuccess(), "contract installation failed")
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@ -128,7 +128,7 @@ func (e *EVM) InvokeSolidity(ctx context.Context, sender address.Address, target
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}
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e.t.Log("waiting for message to execute")
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wait, err := e.StateWaitMsg(ctx, smsg.Cid(), 0, 0, false)
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wait, err := e.StateWaitMsg(ctx, smsg.Cid(), 3, 0, false)
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if err != nil {
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return nil, err
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}
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@ -426,22 +426,6 @@ func (a *EthModule) EthGetCode(ctx context.Context, ethAddr ethtypes.EthAddress,
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return nil, xerrors.Errorf("cannot get Filecoin address: %w", err)
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}
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// use the system actor as the caller
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from, err := address.NewIDAddress(0)
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if err != nil {
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return nil, fmt.Errorf("failed to construct system sender address: %w", err)
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}
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msg := &types.Message{
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From: from,
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To: to,
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Value: big.Zero(),
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Method: builtintypes.MethodsEVM.GetBytecode,
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Params: nil,
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GasLimit: build.BlockGasLimit,
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GasFeeCap: big.Zero(),
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GasPremium: big.Zero(),
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}
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ts, err := a.parseBlkParam(ctx, blkParam)
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if err != nil {
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return nil, xerrors.Errorf("cannot parse block param: %s", blkParam)
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@ -452,6 +436,31 @@ func (a *EthModule) EthGetCode(ctx context.Context, ethAddr ethtypes.EthAddress,
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return nil, xerrors.Errorf("block param must not specify genesis block")
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}
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actor, err := a.StateManager.LoadActor(ctx, to, ts)
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if err != nil {
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if xerrors.Is(err, types.ErrActorNotFound) {
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return nil, nil
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}
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return nil, xerrors.Errorf("failed to lookup contract %s: %w", ethAddr, err)
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}
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// Not a contract. We could try to distinguish between accounts and "native" contracts here,
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// but it's not worth it.
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if !builtinactors.IsEvmActor(actor.Code) {
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return nil, nil
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}
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msg := &types.Message{
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From: builtinactors.SystemActorAddr,
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To: to,
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Value: big.Zero(),
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Method: builtintypes.MethodsEVM.GetBytecode,
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Params: nil,
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GasLimit: build.BlockGasLimit,
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GasFeeCap: big.Zero(),
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GasPremium: big.Zero(),
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}
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// Try calling until we find a height with no migration.
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var res *api.InvocResult
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for {
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@ -466,9 +475,7 @@ func (a *EthModule) EthGetCode(ctx context.Context, ethAddr ethtypes.EthAddress,
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}
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if err != nil {
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// if the call resulted in error, this is not an EVM smart contract;
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// return no bytecode.
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return nil, nil
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return nil, xerrors.Errorf("failed to call GetBytecode: %w", err)
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}
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if res.MsgRct == nil {
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@ -476,15 +483,20 @@ func (a *EthModule) EthGetCode(ctx context.Context, ethAddr ethtypes.EthAddress,
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}
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if res.MsgRct.ExitCode.IsError() {
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return nil, xerrors.Errorf("message execution failed: exit %s, reason: %s", res.MsgRct.ExitCode, res.Error)
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return nil, xerrors.Errorf("GetBytecode failed: %s", res.Error)
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}
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var bytecodeCid cbg.CborCid
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if err := bytecodeCid.UnmarshalCBOR(bytes.NewReader(res.MsgRct.Return)); err != nil {
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var getBytecodeReturn evm.GetBytecodeReturn
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if err := getBytecodeReturn.UnmarshalCBOR(bytes.NewReader(res.MsgRct.Return)); err != nil {
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return nil, fmt.Errorf("failed to decode EVM bytecode CID: %w", err)
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}
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blk, err := a.Chain.StateBlockstore().Get(ctx, cid.Cid(bytecodeCid))
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// The contract has selfdestructed, so the code is "empty".
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if getBytecodeReturn.Cid == nil {
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return nil, nil
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}
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blk, err := a.Chain.StateBlockstore().Get(ctx, *getBytecodeReturn.Cid)
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if err != nil {
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return nil, fmt.Errorf("failed to get EVM bytecode: %w", err)
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}
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