allow using extra binary data in a block for state transition

9 files changed, 87 insertions, 28 deletions

diff --git a/consensus/clique/clique.go b/consensus/clique/clique.go
index c97e198..d3ad1d9 100644
--- a/consensus/clique/clique.go
+++ b/consensus/clique/clique.go
@@ -736,3 +736,7 @@ func encodeSigHeader(w io.Writer, header *types.Header) {
 		panic("can't encode: " + err.Error())
 	}
 }
+
+func (c *Clique) ExtraStateChange(_ *types.Block, _ *state.StateDB) error {
+	return nil
+}
diff --git a/consensus/consensus.go b/consensus/consensus.go
index 93fc9dc..603a3e9 100644
--- a/consensus/consensus.go
+++ b/consensus/consensus.go
@@ -114,6 +114,8 @@ type Engine interface {
 
 	// Close terminates any background threads maintained by the consensus engine.
 	Close() error
+
+	ExtraStateChange(block *types.Block, statedb *state.StateDB) error
 }
 
 // PoW is a consensus engine based on proof-of-work.
diff --git a/consensus/dummy/consensus.go b/consensus/dummy/consensus.go
index adc85fe..9d8db1e 100644
--- a/consensus/dummy/consensus.go
+++ b/consensus/dummy/consensus.go
@@ -21,6 +21,7 @@ import (
 type OnFinalizeCallbackType = func(chain consensus.ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header)
 type OnFinalizeAndAssembleCallbackType = func(chain consensus.ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header, receipts []*types.Receipt)
 type OnAPIsCallbackType = func(consensus.ChainReader) []rpc.API
+type OnExtraStateChangeType = func(block *types.Block, statedb *state.StateDB) error
 
 type ConsensusCallbacks struct {
 	OnSeal                func(*types.Block) error
@@ -28,6 +29,7 @@ type ConsensusCallbacks struct {
 	OnAPIs                OnAPIsCallbackType
 	OnFinalize            OnFinalizeCallbackType
 	OnFinalizeAndAssemble OnFinalizeAndAssembleCallbackType
+	OnExtraStateChange    OnExtraStateChangeType
 }
 
 type DummyEngine struct {
@@ -322,3 +324,10 @@ func (self *DummyEngine) APIs(chain consensus.ChainReader) (res []rpc.API) {
 func (self *DummyEngine) Close() error {
 	return nil
 }
+
+func (self *DummyEngine) ExtraStateChange(block *types.Block, statedb *state.StateDB) error {
+	if self.cb.OnExtraStateChange != nil {
+		return self.cb.OnExtraStateChange(block, statedb)
+	}
+	return nil
+}
diff --git a/consensus/ethash/consensus.go b/consensus/ethash/consensus.go
index d9130ec..c325eea 100644
--- a/consensus/ethash/consensus.go
+++ b/consensus/ethash/consensus.go
@@ -635,3 +635,7 @@ func accumulateRewards(config *params.ChainConfig, state *state.StateDB, header
 	}
 	state.AddBalance(header.Coinbase, reward)
 }
+
+func (ethash *Ethash) ExtraStateChange(_ *types.Block, _ *state.StateDB) error {
+	return nil
+}
diff --git a/core/state_processor.go b/core/state_processor.go
index 6cc646a..ab8759a 100644
--- a/core/state_processor.go
+++ b/core/state_processor.go
@@ -75,6 +75,9 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 		receipts = append(receipts, receipt)
 		allLogs = append(allLogs, receipt.Logs...)
 	}
+	if err := p.engine.ExtraStateChange(block, statedb); err != nil {
+		return nil, nil, 0, err
+	}
 	// Finalize the block, applying any consensus engine specific extras (e.g. block rewards)
 	p.engine.Finalize(p.bc, header, statedb, block.Transactions(), block.Uncles())
 
diff --git a/core/types/block.go b/core/types/block.go
index fcbd8ab..6fa710a 100644
--- a/core/types/block.go
+++ b/core/types/block.go
@@ -150,6 +150,7 @@ type Block struct {
 	header       *Header
 	uncles       []*Header
 	transactions Transactions
+	version      uint32
 	extdata      []byte
 
 	// caches
@@ -187,11 +188,11 @@ type extblock struct {
 }
 
 type myextblock struct {
-	Header        *Header
-	Txs           []*Transaction
-	Uncles        []*Header
-	VersionNumber uint32
-	ExtData       []byte
+	Header  *Header
+	Txs     []*Transaction
+	Uncles  []*Header
+	Version uint32
+	ExtData []byte `rlp:"nil"`
 }
 
 // [deprecated by eth/63]
@@ -291,10 +292,22 @@ func (b *Block) DecodeRLP(s *rlp.Stream) error {
 	return nil
 }
 
-func (b *Block) RawExtraData() []byte {
+func (b *Block) SetExtraData(data []byte) {
+	b.extdata = data
+}
+
+func (b *Block) ExtraData() []byte {
 	return b.extdata
 }
 
+func (b *Block) SetVersion(ver uint32) {
+	b.version = ver
+}
+
+func (b *Block) Version() uint32 {
+	return b.version
+}
+
 // EncodeRLPEth serializes b into the Ethereum RLP block format.
 func (b *Block) EncodeRLPEth(w io.Writer) error {
 	return rlp.Encode(w, extblock{
@@ -304,25 +317,24 @@ func (b *Block) EncodeRLPEth(w io.Writer) error {
 	})
 }
 
-func (b *Block) EncodeRLPTest(w io.Writer, ver uint32, data []byte) error {
+func (b *Block) EncodeRLPTest(w io.Writer, ver uint32) error {
 	return rlp.Encode(w, myextblock{
-		Header:        b.header,
-		Txs:           b.transactions,
-		Uncles:        b.uncles,
-		VersionNumber: ver,
-		ExtData:       data,
+		Header:  b.header,
+		Txs:     b.transactions,
+		Uncles:  b.uncles,
+		Version: ver,
+		ExtData: b.extdata,
 	})
 }
 
 // EncodeRLP serializes b into an extended format.
 func (b *Block) EncodeRLP(w io.Writer) error {
 	return rlp.Encode(w, myextblock{
-		Header:        b.header,
-		Txs:           b.transactions,
-		Uncles:        b.uncles,
-		VersionNumber: 0,
-		// TODO: add actual extra data for the current version
-		ExtData: []byte{},
+		Header:  b.header,
+		Txs:     b.transactions,
+		Uncles:  b.uncles,
+		Version: b.version,
+		ExtData: b.extdata,
 	})
 }
 
diff --git a/coreth.go b/coreth.go
index 099bd08..c8a0e41 100644
--- a/coreth.go
+++ b/coreth.go
@@ -143,6 +143,10 @@ func (self *ETHChain) SetOnFinalizeAndAssemble(cb dummy.OnFinalizeAndAssembleCal
 	self.cb.OnFinalizeAndAssemble = cb
 }
 
+func (self *ETHChain) SetOnExtraStateChange(cb dummy.OnExtraStateChangeType) {
+	self.cb.OnExtraStateChange = cb
+}
+
 func (self *ETHChain) SetOnQueryAcceptedBlock(cb func() *types.Block) {
 	self.bcb.OnQueryAcceptedBlock = cb
 }
diff --git a/examples/block/main.go b/examples/block/main.go
index d9ea16b..e5349e0 100644
--- a/examples/block/main.go
+++ b/examples/block/main.go
@@ -103,15 +103,22 @@ func main() {
 	checkError(err)
 	buff.Reset()
 	extra, err := rlp.EncodeToBytes("test extra data")
-	err = blk2.EncodeRLPTest(buff, 0xffffffff, extra)
+	blk2.SetExtraData(extra)
+	err = blk2.EncodeRLPTest(buff, 0xffffffff)
 	checkError(err)
 	buff.WriteString("somesuffix")
 	fmt.Println(buff.Len())
 	fmt.Println(common.ToHex(buff.Bytes()))
 
 	err = rlp.Decode(buff, blk2)
-	fmt.Println(buff.Len(), (string)(blk2.RawExtraData()))
+	fmt.Println(buff.Len(), (string)(blk2.ExtraData()))
 	checkError(err)
+	decoded1 := new(string)
+	err = rlp.DecodeBytes(blk2.ExtraData(), decoded1)
+	checkError(err)
+	fmt.Println(buff.Len(), decoded1)
+	fmt.Println(common.ToHex(buff.Bytes()))
+
 	buff.Reset()
 	type NestedData struct {
 		A uint16
@@ -128,18 +135,13 @@ func main() {
 		X: 4200, Y: 4300, Msg: "hello", Inner: NestedData{A: 1, B: 2, S: "world"},
 	})
 	checkError(err)
-	err = blk2.EncodeRLPTest(buff, 0xfffffffe, extra)
+	blk2.SetExtraData(extra)
+	err = blk2.EncodeRLPTest(buff, 0xfffffffe)
 	checkError(err)
-	decoded1 := new(string)
-	err = rlp.DecodeBytes(blk2.RawExtraData(), decoded1)
-	checkError(err)
-	fmt.Println(buff.Len(), decoded1)
-	fmt.Println(common.ToHex(buff.Bytes()))
-
 	err = rlp.Decode(buff, blk2)
 	checkError(err)
 	decoded2 := new(MyData)
-	err = rlp.DecodeBytes(blk2.RawExtraData(), decoded2)
+	err = rlp.DecodeBytes(blk2.ExtraData(), decoded2)
 	checkError(err)
 	fmt.Println(buff.Len(), decoded2)
 	buff.Reset()
diff --git a/go.sum b/go.sum
index e8621cb..f1916c2 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,5 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/AppsFlyer/go-sundheit v0.2.0 h1:FArqX+HbqZ6U32RC3giEAWRUpkggqxHj91KIvxNgwjU=
 github.com/AppsFlyer/go-sundheit v0.2.0/go.mod h1:rCRkVTMQo7/krF7xQ9X0XEF1an68viFR6/Gy02q+4ds=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/Microsoft/go-winio v0.4.11/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
@@ -17,15 +18,19 @@ github.com/aristanetworks/goarista v0.0.0-20200520141224-0f14e646773f h1:uM6lu1f
 github.com/aristanetworks/goarista v0.0.0-20200520141224-0f14e646773f/go.mod h1:QZe5Yh80Hp1b6JxQdpfSEEe8X7hTyTEZSosSrFf/oJE=
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+github.com/ava-labs/gecko v0.5.7 h1:8jivA5z3LQ92MA2qIBa6izVGtOqJSVH2lCik6S8xnOI=
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@@ -36,8 +41,10 @@ github.com/deckarep/golang-set v1.7.1 h1:SCQV0S6gTtp6itiFrTqI+pfmJ4LN85S1YzhDf9r
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@@ -92,8 +99,11 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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+github.com/gorilla/mux v1.7.4 h1:VuZ8uybHlWmqV03+zRzdwKL4tUnIp1MAQtp1mIFE1bc=
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+github.com/gorilla/rpc v1.2.0 h1:WvvdC2lNeT1SP32zrIce5l0ECBfbAlmrmSBsuc57wfk=
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@@ -139,15 +149,19 @@ github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHX
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+github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
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+github.com/nbutton23/zxcvbn-go v0.0.0-20180912185939-ae427f1e4c1d h1:AREM5mwr4u1ORQBMvzfzBgpsctsbQikCVpvC+tX285E=
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@@ -171,17 +185,21 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
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+github.com/prometheus/common v0.9.1 h1:KOMtN28tlbam3/7ZKEYKHhKoJZYYj3gMH4uc62x7X7U=
 github.com/prometheus/common v0.9.1/go.mod h1:yhUN8i9wzaXS3w1O07YhxHEBxD+W35wd8bs7vj7HSQ4=
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/procfs v0.0.8/go.mod h1:7Qr8sr6344vo1JqZ6HhLceV9o3AJ1Ff+GxbHq6oeK9A=
 github.com/prometheus/procfs v0.0.10/go.mod h1:7Qr8sr6344vo1JqZ6HhLceV9o3AJ1Ff+GxbHq6oeK9A=
+github.com/prometheus/procfs v0.0.11 h1:DhHlBtkHWPYi8O2y31JkK0TF+DGM+51OopZjH/Ia5qI=
 github.com/prometheus/procfs v0.0.11/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4OA4YeYWdaU=
 github.com/prometheus/tsdb v0.10.0 h1:If5rVCMTp6W2SiRAQFlbpJNgVlgMEd+U2GZckwK38ic=
 github.com/prometheus/tsdb v0.10.0/go.mod h1:oi49uRhEe9dPUTlS3JRZOwJuVi6tmh10QSgwXEyGCt4=
@@ -218,6 +236,7 @@ github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c/go.mod h1:lB8K/P019DLNhe
 github.com/xdg/stringprep v1.0.0/go.mod h1:Jhud4/sHMO4oL310DaZAKk9ZaJ08SJfe+sJh0HrGL1Y=
 github.com/xtaci/kcp-go v5.4.20+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE=
 github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae/go.mod h1:gXtu8J62kEgmN++bm9BVICuT/e8yiLI2KFobd/TRFsE=
+go.opencensus.io v0.22.1 h1:8dP3SGL7MPB94crU3bEPplMPe83FI4EouesJUeFHv50=
 go.opencensus.io v0.22.1/go.mod h1:Ap50jQcDJrx6rB6VgeeFPtuPIf3wMRvRfrfYDO6+BmA=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=