core: implement Metropolis EIP 658, receipt status byte

7 files changed, 54 insertions, 31 deletions

diff --git a/core/database_util_test.go b/core/database_util_test.go
index e9a6df97b..5c75d53d0 100644
--- a/core/database_util_test.go
+++ b/core/database_util_test.go
@@ -461,12 +461,12 @@ func TestMipmapChain(t *testing.T) {
 		var receipts types.Receipts
 		switch i {
 		case 1:
-			receipt := types.NewReceipt(nil, new(big.Int))
+			receipt := types.NewReceipt(nil, false, new(big.Int))
 			receipt.Logs = []*types.Log{{Address: addr, Topics: []common.Hash{hash1}}}
 			gen.AddUncheckedReceipt(receipt)
 			receipts = types.Receipts{receipt}
 		case 1000:
-			receipt := types.NewReceipt(nil, new(big.Int))
+			receipt := types.NewReceipt(nil, false, new(big.Int))
 			receipt.Logs = []*types.Log{{Address: addr2}}
 			gen.AddUncheckedReceipt(receipt)
 			receipts = types.Receipts{receipt}
diff --git a/core/state_processor.go b/core/state_processor.go
index 4489cfce2..a4b554b10 100644
--- a/core/state_processor.go
+++ b/core/state_processor.go
@@ -98,7 +98,7 @@ func ApplyTransaction(config *params.ChainConfig, bc *BlockChain, author *common
 	// about the transaction and calling mechanisms.
 	vmenv := vm.NewEVM(context, statedb, config, cfg)
 	// Apply the transaction to the current state (included in the env)
-	_, gas, err := ApplyMessage(vmenv, msg, gp)
+	_, gas, failed, err := ApplyMessage(vmenv, msg, gp)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -114,7 +114,7 @@ func ApplyTransaction(config *params.ChainConfig, bc *BlockChain, author *common
 
 	// Create a new receipt for the transaction, storing the intermediate root and gas used by the tx
 	// based on the eip phase, we're passing wether the root touch-delete accounts.
-	receipt := types.NewReceipt(root, usedGas)
+	receipt := types.NewReceipt(root, failed, usedGas)
 	receipt.TxHash = tx.Hash()
 	receipt.GasUsed = new(big.Int).Set(gas)
 	// if the transaction created a contract, store the creation address in the receipt.
diff --git a/core/state_transition.go b/core/state_transition.go
index 0ae9d7fcb..bab4540be 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -59,8 +59,7 @@ type StateTransition struct {
 	value      *big.Int
 	data       []byte
 	state      vm.StateDB
-
-	evm *vm.EVM
+	evm        *vm.EVM
 }
 
 // Message represents a message sent to a contract.
@@ -127,11 +126,11 @@ func NewStateTransition(evm *vm.EVM, msg Message, gp *GasPool) *StateTransition
 // the gas used (which includes gas refunds) and an error if it failed. An error always
 // indicates a core error meaning that the message would always fail for that particular
 // state and would never be accepted within a block.
-func ApplyMessage(evm *vm.EVM, msg Message, gp *GasPool) ([]byte, *big.Int, error) {
+func ApplyMessage(evm *vm.EVM, msg Message, gp *GasPool) ([]byte, *big.Int, bool, error) {
 	st := NewStateTransition(evm, msg, gp)
 
-	ret, _, gasUsed, err := st.TransitionDb()
-	return ret, gasUsed, err
+	ret, _, gasUsed, failed, err := st.TransitionDb()
+	return ret, gasUsed, failed, err
 }
 
 func (st *StateTransition) from() vm.AccountRef {
@@ -208,7 +207,7 @@ func (st *StateTransition) preCheck() error {
 // TransitionDb will transition the state by applying the current message and returning the result
 // including the required gas for the operation as well as the used gas. It returns an error if it
 // failed. An error indicates a consensus issue.
-func (st *StateTransition) TransitionDb() (ret []byte, requiredGas, usedGas *big.Int, err error) {
+func (st *StateTransition) TransitionDb() (ret []byte, requiredGas, usedGas *big.Int, failed bool, err error) {
 	if err = st.preCheck(); err != nil {
 		return
 	}
@@ -222,10 +221,10 @@ func (st *StateTransition) TransitionDb() (ret []byte, requiredGas, usedGas *big
 	// TODO convert to uint64
 	intrinsicGas := IntrinsicGas(st.data, contractCreation, homestead)
 	if intrinsicGas.BitLen() > 64 {
-		return nil, nil, nil, vm.ErrOutOfGas
+		return nil, nil, nil, false, vm.ErrOutOfGas
 	}
 	if err = st.useGas(intrinsicGas.Uint64()); err != nil {
-		return nil, nil, nil, err
+		return nil, nil, nil, false, err
 	}
 
 	var (
@@ -248,7 +247,7 @@ func (st *StateTransition) TransitionDb() (ret []byte, requiredGas, usedGas *big
 		// sufficient balance to make the transfer happen. The first
 		// balance transfer may never fail.
 		if vmerr == vm.ErrInsufficientBalance {
-			return nil, nil, nil, vmerr
+			return nil, nil, nil, false, vmerr
 		}
 	}
 	requiredGas = new(big.Int).Set(st.gasUsed())
@@ -256,7 +255,7 @@ func (st *StateTransition) TransitionDb() (ret []byte, requiredGas, usedGas *big
 	st.refundGas()
 	st.state.AddBalance(st.evm.Coinbase, new(big.Int).Mul(st.gasUsed(), st.gasPrice))
 
-	return ret, requiredGas, st.gasUsed(), err
+	return ret, requiredGas, st.gasUsed(), vmerr != nil, err
 }
 
 func (st *StateTransition) refundGas() {
diff --git a/core/types/gen_receipt_json.go b/core/types/gen_receipt_json.go
index eb2e5d42b..1e6880c22 100644
--- a/core/types/gen_receipt_json.go
+++ b/core/types/gen_receipt_json.go
@@ -14,6 +14,7 @@ import (
 func (r Receipt) MarshalJSON() ([]byte, error) {
 	type Receipt struct {
 		PostState         hexutil.Bytes  `json:"root"`
+		Failed            bool           `json:"failed"`
 		CumulativeGasUsed *hexutil.Big   `json:"cumulativeGasUsed" gencodec:"required"`
 		Bloom             Bloom          `json:"logsBloom"         gencodec:"required"`
 		Logs              []*Log         `json:"logs"              gencodec:"required"`
@@ -23,6 +24,7 @@ func (r Receipt) MarshalJSON() ([]byte, error) {
 	}
 	var enc Receipt
 	enc.PostState = r.PostState
+	enc.Failed = r.Failed
 	enc.CumulativeGasUsed = (*hexutil.Big)(r.CumulativeGasUsed)
 	enc.Bloom = r.Bloom
 	enc.Logs = r.Logs
@@ -35,6 +37,7 @@ func (r Receipt) MarshalJSON() ([]byte, error) {
 func (r *Receipt) UnmarshalJSON(input []byte) error {
 	type Receipt struct {
 		PostState         hexutil.Bytes   `json:"root"`
+		Failed            *bool           `json:"failed"`
 		CumulativeGasUsed *hexutil.Big    `json:"cumulativeGasUsed" gencodec:"required"`
 		Bloom             *Bloom          `json:"logsBloom"         gencodec:"required"`
 		Logs              []*Log          `json:"logs"              gencodec:"required"`
@@ -49,6 +52,9 @@ func (r *Receipt) UnmarshalJSON(input []byte) error {
 	if dec.PostState != nil {
 		r.PostState = dec.PostState
 	}
+	if dec.Failed != nil {
+		r.Failed = *dec.Failed
+	}
 	if dec.CumulativeGasUsed == nil {
 		return errors.New("missing required field 'cumulativeGasUsed' for Receipt")
 	}
diff --git a/core/types/receipt.go b/core/types/receipt.go
index c9906b015..9c49648b4 100644
--- a/core/types/receipt.go
+++ b/core/types/receipt.go
@@ -28,10 +28,16 @@ import (
 
 //go:generate gencodec -type Receipt -field-override receiptMarshaling -out gen_receipt_json.go
 
+const (
+	receiptStatusSuccessful = byte(0x01)
+	receiptStatusFailed     = byte(0x00)
+)
+
 // Receipt represents the results of a transaction.
 type Receipt struct {
 	// Consensus fields
 	PostState         []byte   `json:"root"`
+	Failed            bool     `json:"failed"`
 	CumulativeGasUsed *big.Int `json:"cumulativeGasUsed" gencodec:"required"`
 	Bloom             Bloom    `json:"logsBloom"         gencodec:"required"`
 	Logs              []*Log   `json:"logs"              gencodec:"required"`
@@ -60,21 +66,26 @@ type homesteadReceiptRLP struct {
 // metropolisReceiptRLP contains the receipt's Metropolis consensus fields, used
 // during RLP serialization.
 type metropolisReceiptRLP struct {
+	Status            byte
 	CumulativeGasUsed *big.Int
 	Bloom             Bloom
 	Logs              []*Log
 }
 
 // NewReceipt creates a barebone transaction receipt, copying the init fields.
-func NewReceipt(root []byte, cumulativeGasUsed *big.Int) *Receipt {
-	return &Receipt{PostState: common.CopyBytes(root), CumulativeGasUsed: new(big.Int).Set(cumulativeGasUsed)}
+func NewReceipt(root []byte, failed bool, cumulativeGasUsed *big.Int) *Receipt {
+	return &Receipt{PostState: common.CopyBytes(root), Failed: failed, CumulativeGasUsed: new(big.Int).Set(cumulativeGasUsed)}
 }
 
 // EncodeRLP implements rlp.Encoder, and flattens the consensus fields of a receipt
 // into an RLP stream. If no post state is present, metropolis fork is assumed.
 func (r *Receipt) EncodeRLP(w io.Writer) error {
 	if r.PostState == nil {
-		return rlp.Encode(w, &metropolisReceiptRLP{r.CumulativeGasUsed, r.Bloom, r.Logs})
+		status := receiptStatusSuccessful
+		if r.Failed {
+			status = receiptStatusFailed
+		}
+		return rlp.Encode(w, &metropolisReceiptRLP{status, r.CumulativeGasUsed, r.Bloom, r.Logs})
 	}
 	return rlp.Encode(w, &homesteadReceiptRLP{r.PostState, r.CumulativeGasUsed, r.Bloom, r.Logs})
 }
@@ -87,29 +98,31 @@ func (r *Receipt) DecodeRLP(s *rlp.Stream) error {
 	if err != nil {
 		return err
 	}
-	list, _, err := rlp.SplitList(raw)
+	content, _, err := rlp.SplitList(raw)
 	if err != nil {
 		return err
 	}
-	items, err := rlp.CountValues(list)
+	kind, cnt, _, err := rlp.Split(content)
 	if err != nil {
 		return err
 	}
-	// Deserialize based on the number of content items
-	switch items {
-	case 3:
-		// Metropolis receipts have 3 components
+	// Deserialize based on the first component type.
+	switch {
+	case kind == rlp.Byte || kind == rlp.String && len(cnt) == 0:
+		// The first component of metropolis receipts is Byte
+		// or empty String(byte with 0x00 value).
 		var metro metropolisReceiptRLP
 		if err := rlp.DecodeBytes(raw, &metro); err != nil {
 			return err
 		}
+		r.Failed = metro.Status == receiptStatusFailed
 		r.CumulativeGasUsed = metro.CumulativeGasUsed
 		r.Bloom = metro.Bloom
 		r.Logs = metro.Logs
 		return nil
 
-	case 4:
-		// Homestead receipts have 4 components
+	case kind == rlp.String:
+		// The first component of homestead receipts is non-empty String.
 		var home homesteadReceiptRLP
 		if err := rlp.DecodeBytes(raw, &home); err != nil {
 			return err
@@ -121,14 +134,14 @@ func (r *Receipt) DecodeRLP(s *rlp.Stream) error {
 		return nil
 
 	default:
-		return fmt.Errorf("invalid receipt components: %v", items)
+		return fmt.Errorf("invalid first receipt component: %v", kind)
 	}
 }
 
 // String implements the Stringer interface.
 func (r *Receipt) String() string {
 	if r.PostState == nil {
-		return fmt.Sprintf("receipt{cgas=%v bloom=%x logs=%v}", r.CumulativeGasUsed, r.Bloom, r.Logs)
+		return fmt.Sprintf("receipt{failed=%t cgas=%v bloom=%x logs=%v}", r.Failed, r.CumulativeGasUsed, r.Bloom, r.Logs)
 	}
 	return fmt.Sprintf("receipt{med=%x cgas=%v bloom=%x logs=%v}", r.PostState, r.CumulativeGasUsed, r.Bloom, r.Logs)
 }
@@ -144,7 +157,7 @@ func (r *ReceiptForStorage) EncodeRLP(w io.Writer) error {
 	for i, log := range r.Logs {
 		logs[i] = (*LogForStorage)(log)
 	}
-	return rlp.Encode(w, []interface{}{r.PostState, r.CumulativeGasUsed, r.Bloom, r.TxHash, r.ContractAddress, logs, r.GasUsed})
+	return rlp.Encode(w, []interface{}{r.PostState, r.Failed, r.CumulativeGasUsed, r.Bloom, r.TxHash, r.ContractAddress, logs, r.GasUsed})
 }
 
 // DecodeRLP implements rlp.Decoder, and loads both consensus and implementation
@@ -152,6 +165,7 @@ func (r *ReceiptForStorage) EncodeRLP(w io.Writer) error {
 func (r *ReceiptForStorage) DecodeRLP(s *rlp.Stream) error {
 	var receipt struct {
 		PostState         []byte
+		Failed            bool
 		CumulativeGasUsed *big.Int
 		Bloom             Bloom
 		TxHash            common.Hash
@@ -163,7 +177,7 @@ func (r *ReceiptForStorage) DecodeRLP(s *rlp.Stream) error {
 		return err
 	}
 	// Assign the consensus fields
-	r.PostState, r.CumulativeGasUsed, r.Bloom = receipt.PostState, receipt.CumulativeGasUsed, receipt.Bloom
+	r.PostState, r.Failed, r.CumulativeGasUsed, r.Bloom = receipt.PostState, receipt.Failed, receipt.CumulativeGasUsed, receipt.Bloom
 	r.Logs = make([]*Log, len(receipt.Logs))
 	for i, log := range receipt.Logs {
 		r.Logs[i] = (*Log)(log)
diff --git a/core/vm/evm.go b/core/vm/evm.go
index 8d654c666..34933a1dc 100644
--- a/core/vm/evm.go
+++ b/core/vm/evm.go
@@ -158,7 +158,7 @@ func (evm *EVM) Call(caller ContractRef, addr common.Address, input []byte, gas
 	evm.Transfer(evm.StateDB, caller.Address(), to.Address(), value)
 
 	// initialise a new contract and set the code that is to be used by the
-	// E The contract is a scoped evmironment for this execution context
+	// E The contract is a scoped environment for this execution context
 	// only.
 	contract := NewContract(caller, to, value, gas)
 	contract.SetCallCode(&addr, evm.StateDB.GetCodeHash(addr), evm.StateDB.GetCode(addr))
@@ -351,6 +351,10 @@ func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.I
 			contract.UseGas(contract.Gas)
 		}
 	}
+	// Assign err if contract code size exceeds the max while the err is still empty.
+	if maxCodeSizeExceeded && err == nil {
+		err = errMaxCodeSizeExceeded
+	}
 	return ret, contractAddr, contract.Gas, err
 }
 
diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index ece4d2229..b6d6e22c4 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -33,6 +33,7 @@ var (
 	errWriteProtection       = errors.New("evm: write protection")
 	errReturnDataOutOfBounds = errors.New("evm: return data out of bounds")
 	errExecutionReverted     = errors.New("evm: execution reverted")
+	errMaxCodeSizeExceeded   = errors.New("evm: max code size exceeded")
 )
 
 func opAdd(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
@@ -619,7 +620,6 @@ func opCall(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Sta
 	if value.Sign() != 0 {
 		gas += params.CallStipend
 	}
-
 	ret, returnGas, err := evm.Call(contract, address, args, gas, value)
 	if err != nil {
 		stack.push(new(big.Int))