diff --git a/eth/api_backend.go b/eth/api_backend.go index 0e4521173b..959568d294 100644 --- a/eth/api_backend.go +++ b/eth/api_backend.go @@ -246,12 +246,17 @@ func (b *EthAPIBackend) GetTd(ctx context.Context, hash common.Hash) *big.Int { return nil } -func (b *EthAPIBackend) GetEVM(ctx context.Context, msg *core.Message, state *state.StateDB, header *types.Header, vmConfig *vm.Config) (*vm.EVM, func() error, error) { +func (b *EthAPIBackend) GetEVM(ctx context.Context, msg *core.Message, state *state.StateDB, header *types.Header, vmConfig *vm.Config, blockCtx *vm.BlockContext) (*vm.EVM, func() error, error) { if vmConfig == nil { vmConfig = b.eth.blockchain.GetVMConfig() } txContext := core.NewEVMTxContext(msg) - context := core.NewEVMBlockContext(header, b.eth.BlockChain(), nil) + var context vm.BlockContext + if blockCtx != nil { + context = *blockCtx + } else { + context = core.NewEVMBlockContext(header, b.eth.BlockChain(), nil) + } return vm.NewEVM(context, txContext, state, b.eth.blockchain.Config(), *vmConfig), state.Error, nil } diff --git a/eth/tracers/api.go b/eth/tracers/api.go index 2bb00f0d2c..34f4199a83 100644 --- a/eth/tracers/api.go +++ b/eth/tracers/api.go @@ -100,34 +100,10 @@ func NewAPI(backend Backend) *API { return &API{backend: backend} } -type chainContext struct { - api *API - ctx context.Context -} - -func (context *chainContext) Engine() consensus.Engine { - return context.api.backend.Engine() -} - -func (context *chainContext) GetHeader(hash common.Hash, number uint64) *types.Header { - header, err := context.api.backend.HeaderByNumber(context.ctx, rpc.BlockNumber(number)) - if err != nil { - return nil - } - if header.Hash() == hash { - return header - } - header, err = context.api.backend.HeaderByHash(context.ctx, hash) - if err != nil { - return nil - } - return header -} - // chainContext constructs the context reader which is used by the evm for reading // the necessary chain context. func (api *API) chainContext(ctx context.Context) core.ChainContext { - return &chainContext{api: api, ctx: ctx} + return ethapi.NewChainContext(ctx, api.backend) } // blockByNumber is the wrapper of the chain access function offered by the backend. diff --git a/ethclient/gethclient/gethclient.go b/ethclient/gethclient/gethclient.go index fdcfb9a0ac..718cdfea42 100644 --- a/ethclient/gethclient/gethclient.go +++ b/ethclient/gethclient/gethclient.go @@ -143,6 +143,28 @@ func (ec *Client) CallContract(ctx context.Context, msg ethereum.CallMsg, blockN return hex, err } +// CallContractWithBlockOverrides executes a message call transaction, which is directly executed +// in the VM of the node, but never mined into the blockchain. +// +// blockNumber selects the block height at which the call runs. It can be nil, in which +// case the code is taken from the latest known block. Note that state from very old +// blocks might not be available. +// +// overrides specifies a map of contract states that should be overwritten before executing +// the message call. +// +// blockOverrides specifies block fields exposed to the EVM that can be overridden for the call. +// +// Please use ethclient.CallContract instead if you don't need the override functionality. +func (ec *Client) CallContractWithBlockOverrides(ctx context.Context, msg ethereum.CallMsg, blockNumber *big.Int, overrides *map[common.Address]OverrideAccount, blockOverrides BlockOverrides) ([]byte, error) { + var hex hexutil.Bytes + err := ec.c.CallContext( + ctx, &hex, "eth_call", toCallArg(msg), + toBlockNumArg(blockNumber), overrides, blockOverrides, + ) + return hex, err +} + // GCStats retrieves the current garbage collection stats from a geth node. func (ec *Client) GCStats(ctx context.Context) (*debug.GCStats, error) { var result debug.GCStats @@ -265,3 +287,52 @@ func (a OverrideAccount) MarshalJSON() ([]byte, error) { } return json.Marshal(output) } + +// BlockOverrides specifies the set of header fields to override. +type BlockOverrides struct { + // Number overrides the block number. + Number *big.Int + // Difficulty overrides the block difficulty. + Difficulty *big.Int + // Time overrides the block timestamp. Time is applied only when + // it is non-zero. + Time uint64 + // GasLimit overrides the block gas limit. GasLimit is applied only when + // it is non-zero. + GasLimit uint64 + // Coinbase overrides the block coinbase. Coinbase is applied only when + // it is different from the zero address. + Coinbase common.Address + // Random overrides the block extra data which feeds into the RANDOM opcode. + // Random is applied only when it is a non-zero hash. + Random common.Hash + // BaseFee overrides the block base fee. + BaseFee *big.Int +} + +func (o BlockOverrides) MarshalJSON() ([]byte, error) { + type override struct { + Number *hexutil.Big `json:"number,omitempty"` + Difficulty *hexutil.Big `json:"difficulty,omitempty"` + Time hexutil.Uint64 `json:"time,omitempty"` + GasLimit hexutil.Uint64 `json:"gasLimit,omitempty"` + Coinbase *common.Address `json:"coinbase,omitempty"` + Random *common.Hash `json:"random,omitempty"` + BaseFee *hexutil.Big `json:"baseFee,omitempty"` + } + + output := override{ + Number: (*hexutil.Big)(o.Number), + Difficulty: (*hexutil.Big)(o.Difficulty), + Time: hexutil.Uint64(o.Time), + GasLimit: hexutil.Uint64(o.GasLimit), + BaseFee: (*hexutil.Big)(o.BaseFee), + } + if o.Coinbase != (common.Address{}) { + output.Coinbase = &o.Coinbase + } + if o.Random != (common.Hash{}) { + output.Random = &o.Random + } + return json.Marshal(output) +} diff --git a/ethclient/gethclient/gethclient_test.go b/ethclient/gethclient/gethclient_test.go index a9637d182f..87456fd64c 100644 --- a/ethclient/gethclient/gethclient_test.go +++ b/ethclient/gethclient/gethclient_test.go @@ -127,6 +127,9 @@ func TestGethClient(t *testing.T) { }, { "TestCallContract", func(t *testing.T) { testCallContract(t, client) }, + }, { + "TestCallContractWithBlockOverrides", + func(t *testing.T) { testCallContractWithBlockOverrides(t, client) }, }, // The testaccesslist is a bit time-sensitive: the newTestBackend imports // one block. The `testAcessList` fails if the miner has not yet created a @@ -413,3 +416,75 @@ func TestOverrideAccountMarshal(t *testing.T) { t.Error("want:", expected) } } + +func TestBlockOverridesMarshal(t *testing.T) { + for i, tt := range []struct { + bo BlockOverrides + want string + }{ + { + bo: BlockOverrides{}, + want: `{}`, + }, + { + bo: BlockOverrides{ + Coinbase: common.HexToAddress("0x1111111111111111111111111111111111111111"), + }, + want: `{"coinbase":"0x1111111111111111111111111111111111111111"}`, + }, + { + bo: BlockOverrides{ + Number: big.NewInt(1), + Difficulty: big.NewInt(2), + Time: 3, + GasLimit: 4, + BaseFee: big.NewInt(5), + }, + want: `{"number":"0x1","difficulty":"0x2","time":"0x3","gasLimit":"0x4","baseFee":"0x5"}`, + }, + } { + marshalled, err := json.Marshal(&tt.bo) + if err != nil { + t.Fatalf("unexpected error: %v", err) + } + if string(marshalled) != tt.want { + t.Errorf("Testcase #%d failed. expected\n%s\ngot\n%s", i, tt.want, string(marshalled)) + } + } +} + +func testCallContractWithBlockOverrides(t *testing.T, client *rpc.Client) { + ec := New(client) + msg := ethereum.CallMsg{ + From: testAddr, + To: &common.Address{}, + Gas: 50000, + GasPrice: big.NewInt(1000000000), + Value: big.NewInt(1), + } + override := OverrideAccount{ + // Returns coinbase address. + Code: common.FromHex("0x41806000526014600cf3"), + } + mapAcc := make(map[common.Address]OverrideAccount) + mapAcc[common.Address{}] = override + res, err := ec.CallContract(context.Background(), msg, big.NewInt(0), &mapAcc) + if err != nil { + t.Fatalf("unexpected error: %v", err) + } + if !bytes.Equal(res, common.FromHex("0x0000000000000000000000000000000000000000")) { + t.Fatalf("unexpected result: %x", res) + } + + // Now test with block overrides + bo := BlockOverrides{ + Coinbase: common.HexToAddress("0x1111111111111111111111111111111111111111"), + } + res, err = ec.CallContractWithBlockOverrides(context.Background(), msg, big.NewInt(0), &mapAcc, bo) + if err != nil { + t.Fatalf("unexpected error: %v", err) + } + if !bytes.Equal(res, common.FromHex("0x1111111111111111111111111111111111111111")) { + t.Fatalf("unexpected result: %x", res) + } +} diff --git a/graphql/graphql.go b/graphql/graphql.go index ce3ca171cf..35ea8643ad 100644 --- a/graphql/graphql.go +++ b/graphql/graphql.go @@ -1068,7 +1068,7 @@ func (c *CallResult) Status() hexutil.Uint64 { func (b *Block) Call(ctx context.Context, args struct { Data ethapi.TransactionArgs }) (*CallResult, error) { - result, err := ethapi.DoCall(ctx, b.r.backend, args.Data, *b.numberOrHash, nil, b.r.backend.RPCEVMTimeout(), b.r.backend.RPCGasCap()) + result, err := ethapi.DoCall(ctx, b.r.backend, args.Data, *b.numberOrHash, nil, nil, b.r.backend.RPCEVMTimeout(), b.r.backend.RPCGasCap()) if err != nil { return nil, err } @@ -1131,7 +1131,7 @@ func (p *Pending) Call(ctx context.Context, args struct { Data ethapi.TransactionArgs }) (*CallResult, error) { pendingBlockNr := rpc.BlockNumberOrHashWithNumber(rpc.PendingBlockNumber) - result, err := ethapi.DoCall(ctx, p.r.backend, args.Data, pendingBlockNr, nil, p.r.backend.RPCEVMTimeout(), p.r.backend.RPCGasCap()) + result, err := ethapi.DoCall(ctx, p.r.backend, args.Data, pendingBlockNr, nil, nil, p.r.backend.RPCEVMTimeout(), p.r.backend.RPCGasCap()) if err != nil { return nil, err } diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go index f1041d6a50..82ca894609 100644 --- a/internal/ethapi/api.go +++ b/internal/ethapi/api.go @@ -33,6 +33,7 @@ import ( "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/common/hexutil" "github.com/ethereum/go-ethereum/common/math" + "github.com/ethereum/go-ethereum/consensus" "github.com/ethereum/go-ethereum/consensus/ethash" "github.com/ethereum/go-ethereum/consensus/misc" "github.com/ethereum/go-ethereum/core" @@ -955,7 +956,39 @@ func (diff *BlockOverrides) Apply(blockCtx *vm.BlockContext) { } } -func DoCall(ctx context.Context, b Backend, args TransactionArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides *StateOverride, timeout time.Duration, globalGasCap uint64) (*core.ExecutionResult, error) { +// ChainContextBackend provides methods required to implement ChainContext. +type ChainContextBackend interface { + Engine() consensus.Engine + HeaderByNumber(context.Context, rpc.BlockNumber) (*types.Header, error) +} + +// ChainContext is an implementation of core.ChainContext. It's main use-case +// is instantiating a vm.BlockContext without having access to the BlockChain object. +type ChainContext struct { + b ChainContextBackend + ctx context.Context +} + +// NewChainContext creates a new ChainContext object. +func NewChainContext(ctx context.Context, backend ChainContextBackend) *ChainContext { + return &ChainContext{ctx: ctx, b: backend} +} + +func (context *ChainContext) Engine() consensus.Engine { + return context.b.Engine() +} + +func (context *ChainContext) GetHeader(hash common.Hash, number uint64) *types.Header { + // This method is called to get the hash for a block number when executing the BLOCKHASH + // opcode. Hence no need to search for non-canonical blocks. + header, err := context.b.HeaderByNumber(context.ctx, rpc.BlockNumber(number)) + if err != nil || header.Hash() != hash { + return nil + } + return header +} + +func DoCall(ctx context.Context, b Backend, args TransactionArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides *StateOverride, blockOverrides *BlockOverrides, timeout time.Duration, globalGasCap uint64) (*core.ExecutionResult, error) { defer func(start time.Time) { log.Debug("Executing EVM call finished", "runtime", time.Since(start)) }(time.Now()) state, header, err := b.StateAndHeaderByNumberOrHash(ctx, blockNrOrHash) @@ -982,7 +1015,11 @@ func DoCall(ctx context.Context, b Backend, args TransactionArgs, blockNrOrHash if err != nil { return nil, err } - evm, vmError, err := b.GetEVM(ctx, msg, state, header, &vm.Config{NoBaseFee: true}) + blockCtx := core.NewEVMBlockContext(header, NewChainContext(ctx, b), nil) + if blockOverrides != nil { + blockOverrides.Apply(&blockCtx) + } + evm, vmError, err := b.GetEVM(ctx, msg, state, header, &vm.Config{NoBaseFee: true}, &blockCtx) if err != nil { return nil, err } @@ -1046,8 +1083,8 @@ func (e *revertError) ErrorData() interface{} { // // Note, this function doesn't make and changes in the state/blockchain and is // useful to execute and retrieve values. -func (s *BlockChainAPI) Call(ctx context.Context, args TransactionArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides *StateOverride) (hexutil.Bytes, error) { - result, err := DoCall(ctx, s.b, args, blockNrOrHash, overrides, s.b.RPCEVMTimeout(), s.b.RPCGasCap()) +func (s *BlockChainAPI) Call(ctx context.Context, args TransactionArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides *StateOverride, blockOverrides *BlockOverrides) (hexutil.Bytes, error) { + result, err := DoCall(ctx, s.b, args, blockNrOrHash, overrides, blockOverrides, s.b.RPCEVMTimeout(), s.b.RPCGasCap()) if err != nil { return nil, err } @@ -1132,7 +1169,7 @@ func DoEstimateGas(ctx context.Context, b Backend, args TransactionArgs, blockNr executable := func(gas uint64) (bool, *core.ExecutionResult, error) { args.Gas = (*hexutil.Uint64)(&gas) - result, err := DoCall(ctx, b, args, blockNrOrHash, nil, 0, gasCap) + result, err := DoCall(ctx, b, args, blockNrOrHash, nil, nil, 0, gasCap) if err != nil { if errors.Is(err, core.ErrIntrinsicGas) { return true, nil, nil // Special case, raise gas limit @@ -1478,7 +1515,7 @@ func AccessList(ctx context.Context, b Backend, blockNrOrHash rpc.BlockNumberOrH // Apply the transaction with the access list tracer tracer := logger.NewAccessListTracer(accessList, args.from(), to, precompiles) config := vm.Config{Tracer: tracer, NoBaseFee: true} - vmenv, _, err := b.GetEVM(ctx, msg, statedb, header, &config) + vmenv, _, err := b.GetEVM(ctx, msg, statedb, header, &config, nil) if err != nil { return nil, 0, nil, err } diff --git a/internal/ethapi/api_test.go b/internal/ethapi/api_test.go index 205e23e847..39f912a349 100644 --- a/internal/ethapi/api_test.go +++ b/internal/ethapi/api_test.go @@ -17,14 +17,34 @@ package ethapi import ( + "bytes" + "context" + "crypto/ecdsa" "encoding/json" + "errors" "math/big" + "reflect" + "sort" "testing" + "time" + "github.com/ethereum/go-ethereum" + "github.com/ethereum/go-ethereum/accounts" "github.com/ethereum/go-ethereum/common" + "github.com/ethereum/go-ethereum/common/hexutil" + "github.com/ethereum/go-ethereum/consensus" + "github.com/ethereum/go-ethereum/consensus/ethash" + "github.com/ethereum/go-ethereum/core" + "github.com/ethereum/go-ethereum/core/bloombits" + "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/crypto" + "github.com/ethereum/go-ethereum/ethdb" + "github.com/ethereum/go-ethereum/event" "github.com/ethereum/go-ethereum/params" + "github.com/ethereum/go-ethereum/rpc" ) func TestTransaction_RoundTripRpcJSON(t *testing.T) { @@ -157,3 +177,450 @@ func allTransactionTypes(addr common.Address, config *params.ChainConfig) []type }, } } + +type testBackend struct { + db ethdb.Database + chain *core.BlockChain +} + +func newTestBackend(t *testing.T, n int, gspec *core.Genesis, generator func(i int, b *core.BlockGen)) *testBackend { + var ( + engine = ethash.NewFaker() + backend = &testBackend{ + db: rawdb.NewMemoryDatabase(), + } + cacheConfig = &core.CacheConfig{ + TrieCleanLimit: 256, + TrieDirtyLimit: 256, + TrieTimeLimit: 5 * time.Minute, + SnapshotLimit: 0, + TrieDirtyDisabled: true, // Archive mode + } + ) + // Generate blocks for testing + _, blocks, _ := core.GenerateChainWithGenesis(gspec, engine, n, generator) + chain, err := core.NewBlockChain(backend.db, cacheConfig, gspec, nil, engine, vm.Config{}, nil, nil) + if err != nil { + t.Fatalf("failed to create tester chain: %v", err) + } + if n, err := chain.InsertChain(blocks); err != nil { + t.Fatalf("block %d: failed to insert into chain: %v", n, err) + } + backend.chain = chain + return backend +} + +func (b testBackend) SyncProgress() ethereum.SyncProgress { return ethereum.SyncProgress{} } +func (b testBackend) SuggestGasTipCap(ctx context.Context) (*big.Int, error) { + return big.NewInt(0), nil +} +func (b testBackend) FeeHistory(ctx context.Context, blockCount uint64, lastBlock rpc.BlockNumber, rewardPercentiles []float64) (*big.Int, [][]*big.Int, []*big.Int, []float64, error) { + return nil, nil, nil, nil, nil +} +func (b testBackend) ChainDb() ethdb.Database { return b.db } +func (b testBackend) AccountManager() *accounts.Manager { return nil } +func (b testBackend) ExtRPCEnabled() bool { return false } +func (b testBackend) RPCGasCap() uint64 { return 10000000 } +func (b testBackend) RPCEVMTimeout() time.Duration { return time.Second } +func (b testBackend) RPCTxFeeCap() float64 { return 0 } +func (b testBackend) UnprotectedAllowed() bool { return false } +func (b testBackend) SetHead(number uint64) {} +func (b testBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) { + if number == rpc.LatestBlockNumber { + return b.chain.CurrentBlock(), nil + } + return b.chain.GetHeaderByNumber(uint64(number)), nil +} +func (b testBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) { + panic("implement me") +} +func (b testBackend) HeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Header, error) { + panic("implement me") +} +func (b testBackend) CurrentHeader() *types.Header { panic("implement me") } +func (b testBackend) CurrentBlock() *types.Header { panic("implement me") } +func (b testBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) { + if number == rpc.LatestBlockNumber { + head := b.chain.CurrentBlock() + return b.chain.GetBlock(head.Hash(), head.Number.Uint64()), nil + } + return b.chain.GetBlockByNumber(uint64(number)), nil +} +func (b testBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) { + panic("implement me") +} +func (b testBackend) BlockByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Block, error) { + if blockNr, ok := blockNrOrHash.Number(); ok { + return b.BlockByNumber(ctx, blockNr) + } + panic("implement me") +} +func (b testBackend) GetBody(ctx context.Context, hash common.Hash, number rpc.BlockNumber) (*types.Body, error) { + return b.chain.GetBlock(hash, uint64(number.Int64())).Body(), nil +} +func (b testBackend) StateAndHeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*state.StateDB, *types.Header, error) { + if number == rpc.PendingBlockNumber { + panic("pending state not implemented") + } + header, err := b.HeaderByNumber(ctx, number) + if err != nil { + return nil, nil, err + } + if header == nil { + return nil, nil, errors.New("header not found") + } + stateDb, err := b.chain.StateAt(header.Root) + return stateDb, header, err +} +func (b testBackend) StateAndHeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*state.StateDB, *types.Header, error) { + if blockNr, ok := blockNrOrHash.Number(); ok { + return b.StateAndHeaderByNumber(ctx, blockNr) + } + panic("only implemented for number") +} +func (b testBackend) PendingBlockAndReceipts() (*types.Block, types.Receipts) { panic("implement me") } +func (b testBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) { + panic("implement me") +} +func (b testBackend) GetTd(ctx context.Context, hash common.Hash) *big.Int { panic("implement me") } +func (b testBackend) GetEVM(ctx context.Context, msg *core.Message, state *state.StateDB, header *types.Header, vmConfig *vm.Config, blockContext *vm.BlockContext) (*vm.EVM, func() error, error) { + vmError := func() error { return nil } + if vmConfig == nil { + vmConfig = b.chain.GetVMConfig() + } + txContext := core.NewEVMTxContext(msg) + context := core.NewEVMBlockContext(header, b.chain, nil) + if blockContext != nil { + context = *blockContext + } + return vm.NewEVM(context, txContext, state, b.chain.Config(), *vmConfig), vmError, nil +} +func (b testBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription { + panic("implement me") +} +func (b testBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription { + panic("implement me") +} +func (b testBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription { + panic("implement me") +} +func (b testBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error { + panic("implement me") +} +func (b testBackend) GetTransaction(ctx context.Context, txHash common.Hash) (*types.Transaction, common.Hash, uint64, uint64, error) { + panic("implement me") +} +func (b testBackend) GetPoolTransactions() (types.Transactions, error) { panic("implement me") } +func (b testBackend) GetPoolTransaction(txHash common.Hash) *types.Transaction { panic("implement me") } +func (b testBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) { + panic("implement me") +} +func (b testBackend) Stats() (pending int, queued int) { panic("implement me") } +func (b testBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) { + panic("implement me") +} +func (b testBackend) TxPoolContentFrom(addr common.Address) (types.Transactions, types.Transactions) { + panic("implement me") +} +func (b testBackend) SubscribeNewTxsEvent(events chan<- core.NewTxsEvent) event.Subscription { + panic("implement me") +} +func (b testBackend) ChainConfig() *params.ChainConfig { return b.chain.Config() } +func (b testBackend) Engine() consensus.Engine { return b.chain.Engine() } +func (b testBackend) GetLogs(ctx context.Context, blockHash common.Hash, number uint64) ([][]*types.Log, error) { + panic("implement me") +} +func (b testBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription { + panic("implement me") +} +func (b testBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription { + panic("implement me") +} +func (b testBackend) SubscribePendingLogsEvent(ch chan<- []*types.Log) event.Subscription { + panic("implement me") +} +func (b testBackend) BloomStatus() (uint64, uint64) { panic("implement me") } +func (b testBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) { + panic("implement me") +} + +func TestEstimateGas(t *testing.T) { + t.Parallel() + // Initialize test accounts + var ( + accounts = newAccounts(2) + genesis = &core.Genesis{ + Config: params.TestChainConfig, + Alloc: core.GenesisAlloc{ + accounts[0].addr: {Balance: big.NewInt(params.Ether)}, + accounts[1].addr: {Balance: big.NewInt(params.Ether)}, + }, + } + genBlocks = 10 + signer = types.HomesteadSigner{} + randomAccounts = newAccounts(2) + ) + api := NewBlockChainAPI(newTestBackend(t, genBlocks, genesis, func(i int, b *core.BlockGen) { + // Transfer from account[0] to account[1] + // value: 1000 wei + // fee: 0 wei + tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{Nonce: uint64(i), To: &accounts[1].addr, Value: big.NewInt(1000), Gas: params.TxGas, GasPrice: b.BaseFee(), Data: nil}), signer, accounts[0].key) + b.AddTx(tx) + })) + var testSuite = []struct { + blockNumber rpc.BlockNumber + call TransactionArgs + expectErr error + want uint64 + }{ + // simple transfer on latest block + { + blockNumber: rpc.LatestBlockNumber, + call: TransactionArgs{ + From: &accounts[0].addr, + To: &accounts[1].addr, + Value: (*hexutil.Big)(big.NewInt(1000)), + }, + expectErr: nil, + want: 21000, + }, + // simple transfer with insufficient funds on latest block + { + blockNumber: rpc.LatestBlockNumber, + call: TransactionArgs{ + From: &randomAccounts[0].addr, + To: &accounts[1].addr, + Value: (*hexutil.Big)(big.NewInt(1000)), + }, + expectErr: core.ErrInsufficientFunds, + want: 21000, + }, + // empty create + { + blockNumber: rpc.LatestBlockNumber, + call: TransactionArgs{}, + expectErr: nil, + want: 53000, + }, + } + for i, tc := range testSuite { + result, err := api.EstimateGas(context.Background(), tc.call, &rpc.BlockNumberOrHash{BlockNumber: &tc.blockNumber}) + if tc.expectErr != nil { + if err == nil { + t.Errorf("test %d: want error %v, have nothing", i, tc.expectErr) + continue + } + if !errors.Is(err, tc.expectErr) { + t.Errorf("test %d: error mismatch, want %v, have %v", i, tc.expectErr, err) + } + continue + } + if err != nil { + t.Errorf("test %d: want no error, have %v", i, err) + continue + } + if uint64(result) != tc.want { + t.Errorf("test %d, result mismatch, have\n%v\n, want\n%v\n", i, uint64(result), tc.want) + } + } +} + +func TestCall(t *testing.T) { + t.Parallel() + // Initialize test accounts + var ( + accounts = newAccounts(3) + genesis = &core.Genesis{ + Config: params.TestChainConfig, + Alloc: core.GenesisAlloc{ + accounts[0].addr: {Balance: big.NewInt(params.Ether)}, + accounts[1].addr: {Balance: big.NewInt(params.Ether)}, + accounts[2].addr: {Balance: big.NewInt(params.Ether)}, + }, + } + genBlocks = 10 + signer = types.HomesteadSigner{} + ) + api := NewBlockChainAPI(newTestBackend(t, genBlocks, genesis, func(i int, b *core.BlockGen) { + // Transfer from account[0] to account[1] + // value: 1000 wei + // fee: 0 wei + tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{Nonce: uint64(i), To: &accounts[1].addr, Value: big.NewInt(1000), Gas: params.TxGas, GasPrice: b.BaseFee(), Data: nil}), signer, accounts[0].key) + b.AddTx(tx) + })) + randomAccounts := newAccounts(3) + var testSuite = []struct { + blockNumber rpc.BlockNumber + overrides StateOverride + call TransactionArgs + blockOverrides BlockOverrides + expectErr error + want string + }{ + // transfer on genesis + { + blockNumber: rpc.BlockNumber(0), + call: TransactionArgs{ + From: &accounts[0].addr, + To: &accounts[1].addr, + Value: (*hexutil.Big)(big.NewInt(1000)), + }, + expectErr: nil, + want: "0x", + }, + // transfer on the head + { + blockNumber: rpc.BlockNumber(genBlocks), + call: TransactionArgs{ + From: &accounts[0].addr, + To: &accounts[1].addr, + Value: (*hexutil.Big)(big.NewInt(1000)), + }, + expectErr: nil, + want: "0x", + }, + // transfer on a non-existent block, error expects + { + blockNumber: rpc.BlockNumber(genBlocks + 1), + call: TransactionArgs{ + From: &accounts[0].addr, + To: &accounts[1].addr, + Value: (*hexutil.Big)(big.NewInt(1000)), + }, + expectErr: errors.New("header not found"), + }, + // transfer on the latest block + { + blockNumber: rpc.LatestBlockNumber, + call: TransactionArgs{ + From: &accounts[0].addr, + To: &accounts[1].addr, + Value: (*hexutil.Big)(big.NewInt(1000)), + }, + expectErr: nil, + want: "0x", + }, + // Call which can only succeed if state is state overridden + { + blockNumber: rpc.LatestBlockNumber, + call: TransactionArgs{ + From: &randomAccounts[0].addr, + To: &randomAccounts[1].addr, + Value: (*hexutil.Big)(big.NewInt(1000)), + }, + overrides: StateOverride{ + randomAccounts[0].addr: OverrideAccount{Balance: newRPCBalance(new(big.Int).Mul(big.NewInt(1), big.NewInt(params.Ether)))}, + }, + want: "0x", + }, + // Invalid call without state overriding + { + blockNumber: rpc.LatestBlockNumber, + call: TransactionArgs{ + From: &randomAccounts[0].addr, + To: &randomAccounts[1].addr, + Value: (*hexutil.Big)(big.NewInt(1000)), + }, + expectErr: core.ErrInsufficientFunds, + }, + // Successful simple contract call + // + // // SPDX-License-Identifier: GPL-3.0 + // + // pragma solidity >=0.7.0 <0.8.0; + // + // /** + // * @title Storage + // * @dev Store & retrieve value in a variable + // */ + // contract Storage { + // uint256 public number; + // constructor() { + // number = block.number; + // } + // } + { + blockNumber: rpc.LatestBlockNumber, + call: TransactionArgs{ + From: &randomAccounts[0].addr, + To: &randomAccounts[2].addr, + Data: hex2Bytes("8381f58a"), // call number() + }, + overrides: StateOverride{ + randomAccounts[2].addr: OverrideAccount{ + Code: hex2Bytes("6080604052348015600f57600080fd5b506004361060285760003560e01c80638381f58a14602d575b600080fd5b60336049565b6040518082815260200191505060405180910390f35b6000548156fea2646970667358221220eab35ffa6ab2adfe380772a48b8ba78e82a1b820a18fcb6f59aa4efb20a5f60064736f6c63430007040033"), + StateDiff: &map[common.Hash]common.Hash{common.Hash{}: common.BigToHash(big.NewInt(123))}, + }, + }, + want: "0x000000000000000000000000000000000000000000000000000000000000007b", + }, + // Block overrides should work + { + blockNumber: rpc.LatestBlockNumber, + call: TransactionArgs{ + From: &accounts[1].addr, + Input: &hexutil.Bytes{ + 0x43, // NUMBER + 0x60, 0x00, 0x52, // MSTORE offset 0 + 0x60, 0x20, 0x60, 0x00, 0xf3, + }, + }, + blockOverrides: BlockOverrides{Number: (*hexutil.Big)(big.NewInt(11))}, + want: "0x000000000000000000000000000000000000000000000000000000000000000b", + }, + } + for i, tc := range testSuite { + result, err := api.Call(context.Background(), tc.call, rpc.BlockNumberOrHash{BlockNumber: &tc.blockNumber}, &tc.overrides, &tc.blockOverrides) + if tc.expectErr != nil { + if err == nil { + t.Errorf("test %d: want error %v, have nothing", i, tc.expectErr) + continue + } + if !errors.Is(err, tc.expectErr) { + // Second try + if !reflect.DeepEqual(err, tc.expectErr) { + t.Errorf("test %d: error mismatch, want %v, have %v", i, tc.expectErr, err) + } + } + continue + } + if err != nil { + t.Errorf("test %d: want no error, have %v", i, err) + continue + } + if !reflect.DeepEqual(result.String(), tc.want) { + t.Errorf("test %d, result mismatch, have\n%v\n, want\n%v\n", i, result.String(), tc.want) + } + } +} + +type Account struct { + key *ecdsa.PrivateKey + addr common.Address +} + +type Accounts []Account + +func (a Accounts) Len() int { return len(a) } +func (a Accounts) Swap(i, j int) { a[i], a[j] = a[j], a[i] } +func (a Accounts) Less(i, j int) bool { return bytes.Compare(a[i].addr.Bytes(), a[j].addr.Bytes()) < 0 } + +func newAccounts(n int) (accounts Accounts) { + for i := 0; i < n; i++ { + key, _ := crypto.GenerateKey() + addr := crypto.PubkeyToAddress(key.PublicKey) + accounts = append(accounts, Account{key: key, addr: addr}) + } + sort.Sort(accounts) + return accounts +} + +func newRPCBalance(balance *big.Int) **hexutil.Big { + rpcBalance := (*hexutil.Big)(balance) + return &rpcBalance +} + +func hex2Bytes(str string) *hexutil.Bytes { + rpcBytes := hexutil.Bytes(common.Hex2Bytes(str)) + return &rpcBytes +} diff --git a/internal/ethapi/backend.go b/internal/ethapi/backend.go index 0249c8664d..3e4ee505f3 100644 --- a/internal/ethapi/backend.go +++ b/internal/ethapi/backend.go @@ -68,7 +68,7 @@ type Backend interface { PendingBlockAndReceipts() (*types.Block, types.Receipts) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) GetTd(ctx context.Context, hash common.Hash) *big.Int - GetEVM(ctx context.Context, msg *core.Message, state *state.StateDB, header *types.Header, vmConfig *vm.Config) (*vm.EVM, func() error, error) + GetEVM(ctx context.Context, msg *core.Message, state *state.StateDB, header *types.Header, vmConfig *vm.Config, blockCtx *vm.BlockContext) (*vm.EVM, func() error, error) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription diff --git a/internal/ethapi/transaction_args_test.go b/internal/ethapi/transaction_args_test.go index 24c15b7775..124f2164cf 100644 --- a/internal/ethapi/transaction_args_test.go +++ b/internal/ethapi/transaction_args_test.go @@ -305,7 +305,7 @@ func (b *backendMock) GetLogs(ctx context.Context, blockHash common.Hash, number return nil, nil } func (b *backendMock) GetTd(ctx context.Context, hash common.Hash) *big.Int { return nil } -func (b *backendMock) GetEVM(ctx context.Context, msg *core.Message, state *state.StateDB, header *types.Header, vmConfig *vm.Config) (*vm.EVM, func() error, error) { +func (b *backendMock) GetEVM(ctx context.Context, msg *core.Message, state *state.StateDB, header *types.Header, vmConfig *vm.Config, blockCtx *vm.BlockContext) (*vm.EVM, func() error, error) { return nil, nil, nil } func (b *backendMock) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription { return nil } diff --git a/internal/web3ext/web3ext.go b/internal/web3ext/web3ext.go index 388eed8a2f..3366329643 100644 --- a/internal/web3ext/web3ext.go +++ b/internal/web3ext/web3ext.go @@ -608,8 +608,8 @@ web3._extend({ new web3._extend.Method({ name: 'call', call: 'eth_call', - params: 3, - inputFormatter: [web3._extend.formatters.inputCallFormatter, web3._extend.formatters.inputDefaultBlockNumberFormatter, null], + params: 4, + inputFormatter: [web3._extend.formatters.inputCallFormatter, web3._extend.formatters.inputDefaultBlockNumberFormatter, null, null], }), ], properties: [ diff --git a/les/api_backend.go b/les/api_backend.go index 2d1fccd9ad..86da26da65 100644 --- a/les/api_backend.go +++ b/les/api_backend.go @@ -184,12 +184,15 @@ func (b *LesApiBackend) GetTd(ctx context.Context, hash common.Hash) *big.Int { return nil } -func (b *LesApiBackend) GetEVM(ctx context.Context, msg *core.Message, state *state.StateDB, header *types.Header, vmConfig *vm.Config) (*vm.EVM, func() error, error) { +func (b *LesApiBackend) GetEVM(ctx context.Context, msg *core.Message, state *state.StateDB, header *types.Header, vmConfig *vm.Config, blockCtx *vm.BlockContext) (*vm.EVM, func() error, error) { if vmConfig == nil { vmConfig = new(vm.Config) } txContext := core.NewEVMTxContext(msg) context := core.NewEVMBlockContext(header, b.eth.blockchain, nil) + if blockCtx != nil { + context = *blockCtx + } return vm.NewEVM(context, txContext, state, b.eth.chainConfig, *vmConfig), state.Error, nil }