diff options
author | Wei-Ning Huang <w@dexon.org> | 2019-01-06 23:21:54 +0800 |
---|---|---|
committer | Wei-Ning Huang <w@byzantine-lab.io> | 2019-06-12 17:27:21 +0800 |
commit | c6c8b6cfd083058a255d614db14df0e75fdd3482 (patch) | |
tree | 23fd25eec0a08923f2516fc688ad2487592ae928 /core/vm/governance.go | |
parent | 2b7671af8b76f64bcbe69d99509d454cb33be5ad (diff) | |
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core: vm: implement byzantine reporting mechanism (#128)
Diffstat (limited to 'core/vm/governance.go')
-rw-r--r-- | core/vm/governance.go | 431 |
1 files changed, 393 insertions, 38 deletions
diff --git a/core/vm/governance.go b/core/vm/governance.go index 6dccc8c7d..1df82f84c 100644 --- a/core/vm/governance.go +++ b/core/vm/governance.go @@ -18,7 +18,10 @@ package vm import ( + "bytes" + "errors" "math/big" + "sort" "strings" "github.com/dexon-foundation/dexon/accounts/abi" @@ -331,6 +334,25 @@ const GovernanceABIJSON = ` }, { "constant": true, + "inputs": [ + { + "name": "", + "type": "bytes32" + } + ], + "name": "nodesOffsetByID", + "outputs": [ + { + "name": "", + "type": "int256" + } + ], + "payable": false, + "stateMutability": "view", + "type": "function" + }, + { + "constant": true, "inputs": [], "name": "roundInterval", "outputs": [ @@ -345,6 +367,25 @@ const GovernanceABIJSON = ` }, { "constant": true, + "inputs": [ + { + "name": "", + "type": "address" + } + ], + "name": "nodesOffsetByAddress", + "outputs": [ + { + "name": "", + "type": "int256" + } + ], + "payable": false, + "stateMutability": "view", + "type": "function" + }, + { + "constant": true, "inputs": [], "name": "owner", "outputs": [ @@ -362,14 +403,14 @@ const GovernanceABIJSON = ` "inputs": [ { "name": "", - "type": "address" + "type": "bytes32" } ], - "name": "nodesOffset", + "name": "finedRecords", "outputs": [ { "name": "", - "type": "int256" + "type": "bool" } ], "payable": false, @@ -398,6 +439,25 @@ const GovernanceABIJSON = ` "type": "uint256" } ], + "name": "fineValues", + "outputs": [ + { + "name": "", + "type": "uint256" + } + ], + "payable": false, + "stateMutability": "view", + "type": "function" + }, + { + "constant": true, + "inputs": [ + { + "name": "", + "type": "uint256" + } + ], "name": "roundHeight", "outputs": [ { @@ -684,6 +744,10 @@ const GovernanceABIJSON = ` { "name": "MinBlockInterval", "type": "uint256" + }, + { + "name": "FineValues", + "type": "uint256[]" } ], "name": "updateConfiguration", @@ -927,6 +991,28 @@ const GovernanceABIJSON = ` "payable": true, "stateMutability": "payable", "type": "function" + }, + { + "constant": false, + "inputs": [ + { + "name": "Type", + "type": "uint256" + }, + { + "name": "Arg1", + "type": "bytes" + }, + { + "name": "Arg2", + "type": "bytes" + } + ], + "name": "report", + "outputs": [], + "payable": false, + "stateMutability": "nonpayable", + "type": "function" } ] ` @@ -936,6 +1022,16 @@ var GovernanceContractName2Method map[string]abi.Method var sig2Method map[string]abi.Method var events map[string]abi.Event +type Bytes32 [32]byte + +type ReportType uint64 + +const ( + ReportTypeInvalidDKG = iota + ReportTypeForkVote + ReportTypeForkBlock +) + func init() { var err error @@ -1037,6 +1133,12 @@ func RunGovernanceContract(evm *EVM, input []byte, contract *Contract) (ret []by return nil, errExecutionReverted } return res, nil + case "payFine": + address := common.Address{} + if err := method.Inputs.Unpack(&address, arguments); err != nil { + return nil, errExecutionReverted + } + return g.payFine(address) case "proposeCRS": args := struct { Round *big.Int @@ -1046,6 +1148,16 @@ func RunGovernanceContract(evm *EVM, input []byte, contract *Contract) (ret []by return nil, errExecutionReverted } return g.proposeCRS(args.Round, args.SignedCRS) + case "report": + args := struct { + Type *big.Int + Arg1 []byte + Arg2 []byte + }{} + if err := method.Inputs.Unpack(&args, arguments); err != nil { + return nil, errExecutionReverted + } + return g.report(args.Type, args.Arg1, args.Arg2) case "stake": args := struct { PublicKey []byte @@ -1093,12 +1205,6 @@ func RunGovernanceContract(evm *EVM, input []byte, contract *Contract) (ret []by return nil, errExecutionReverted } return g.withdraw(address) - case "payFine": - address := common.Address{} - if err := method.Inputs.Unpack(&address, arguments); err != nil { - return nil, errExecutionReverted - } - return g.payFine(address) // -------------------------------- // Solidity auto generated methods. @@ -1234,6 +1340,28 @@ func RunGovernanceContract(evm *EVM, input []byte, contract *Contract) (ret []by return nil, errExecutionReverted } return res, nil + case "finedRecords": + record := Bytes32{} + if err := method.Inputs.Unpack(&record, arguments); err != nil { + return nil, errExecutionReverted + } + value := g.state.FineRecords(record) + res, err := method.Outputs.Pack(value) + if err != nil { + return nil, errExecutionReverted + } + return res, nil + case "fineValues": + index := new(big.Int) + if err := method.Inputs.Unpack(&index, arguments); err != nil { + return nil, errExecutionReverted + } + value := g.state.FineValue(index) + res, err := method.Outputs.Pack(value) + if err != nil { + return nil, errExecutionReverted + } + return res, nil case "k": res, err := method.Outputs.Pack(g.state.K()) if err != nil { @@ -1289,12 +1417,22 @@ func RunGovernanceContract(evm *EVM, input []byte, contract *Contract) (ret []by return nil, errExecutionReverted } return res, nil - case "nodesOffset": + case "nodesOffsetByAddress": address := common.Address{} if err := method.Inputs.Unpack(&address, arguments); err != nil { return nil, errExecutionReverted } - res, err := method.Outputs.Pack(g.state.NodesOffset(address)) + res, err := method.Outputs.Pack(g.state.NodesOffsetByAddress(address)) + if err != nil { + return nil, errExecutionReverted + } + return res, nil + case "nodesOffsetByID": + var id Bytes32 + if err := method.Inputs.Unpack(&id, arguments); err != nil { + return nil, errExecutionReverted + } + res, err := method.Outputs.Pack(g.state.NodesOffsetByID(id)) if err != nil { return nil, errExecutionReverted } @@ -1341,7 +1479,8 @@ func RunGovernanceContract(evm *EVM, input []byte, contract *Contract) (ret []by const ( roundHeightLoc = iota nodesLoc - nodesOffsetLoc + nodesOffsetByAddressLoc + nodesOffsetByIDLoc delegatorsLoc delegatorsOffsetLoc crsLoc @@ -1365,8 +1504,19 @@ const ( dkgSetSizeLoc roundIntervalLoc minBlockIntervalLoc + fineValuesLoc + finedRecordsLoc ) +func publicKeyToNodeID(pkBytes []byte) (Bytes32, error) { + pk, err := crypto.UnmarshalPubkey(pkBytes) + if err != nil { + return Bytes32{}, err + } + id := Bytes32(coreTypes.NewNodeID(ecdsa.NewPublicKeyFromECDSA(pk)).Hash) + return id, nil +} + // State manipulation helper fro the governance contract. type GovernanceStateHelper struct { StateDB StateDB @@ -1675,6 +1825,9 @@ func (s *GovernanceStateHelper) QualifiedNodes() []*nodeInfo { var nodes []*nodeInfo for i := int64(0); i < int64(s.LenNodes().Uint64()); i++ { node := s.Node(big.NewInt(i)) + if node.Unstaked { + continue + } if new(big.Int).Sub(node.Staked, node.Fined).Cmp(s.MinStake()) >= 0 { nodes = append(nodes, node) } @@ -1682,20 +1835,44 @@ func (s *GovernanceStateHelper) QualifiedNodes() []*nodeInfo { return nodes } -// mapping(address => uint256) public nodeOffset; -func (s *GovernanceStateHelper) NodesOffset(addr common.Address) *big.Int { - loc := s.getMapLoc(big.NewInt(nodesOffsetLoc), addr.Bytes()) +// mapping(address => uint256) public nodeOffsetByAddress; +func (s *GovernanceStateHelper) NodesOffsetByAddress(addr common.Address) *big.Int { + loc := s.getMapLoc(big.NewInt(nodesOffsetByAddressLoc), addr.Bytes()) return new(big.Int).Sub(s.getStateBigInt(loc), big.NewInt(1)) } -func (s *GovernanceStateHelper) PutNodesOffset(addr common.Address, offset *big.Int) { - loc := s.getMapLoc(big.NewInt(nodesOffsetLoc), addr.Bytes()) +func (s *GovernanceStateHelper) PutNodesOffsetByAddress(addr common.Address, offset *big.Int) { + loc := s.getMapLoc(big.NewInt(nodesOffsetByAddressLoc), addr.Bytes()) s.setStateBigInt(loc, new(big.Int).Add(offset, big.NewInt(1))) } -func (s *GovernanceStateHelper) DeleteNodesOffset(addr common.Address) { - loc := s.getMapLoc(big.NewInt(nodesOffsetLoc), addr.Bytes()) +func (s *GovernanceStateHelper) DeleteNodesOffsetByAddress(addr common.Address) { + loc := s.getMapLoc(big.NewInt(nodesOffsetByAddressLoc), addr.Bytes()) s.setStateBigInt(loc, big.NewInt(0)) } +// mapping(address => uint256) public nodeOffsetByID; +func (s *GovernanceStateHelper) NodesOffsetByID(id Bytes32) *big.Int { + loc := s.getMapLoc(big.NewInt(nodesOffsetByIDLoc), id[:]) + return new(big.Int).Sub(s.getStateBigInt(loc), big.NewInt(1)) +} +func (s *GovernanceStateHelper) PutNodesOffsetByID(id Bytes32, offset *big.Int) { + loc := s.getMapLoc(big.NewInt(nodesOffsetByIDLoc), id[:]) + s.setStateBigInt(loc, new(big.Int).Add(offset, big.NewInt(1))) +} +func (s *GovernanceStateHelper) DeleteNodesOffsetByID(id Bytes32) { + loc := s.getMapLoc(big.NewInt(nodesOffsetByIDLoc), id[:]) + s.setStateBigInt(loc, big.NewInt(0)) +} + +func (s *GovernanceStateHelper) PutNodeOffsets(n *nodeInfo, offset *big.Int) error { + id, err := publicKeyToNodeID(n.PublicKey) + if err != nil { + return err + } + s.PutNodesOffsetByID(id, offset) + s.PutNodesOffsetByAddress(n.Owner, offset) + return nil +} + // struct Delegator { // address node; // address owner; @@ -1841,6 +2018,20 @@ func (s *GovernanceStateHelper) UniqueDKGMasterPublicKeys(round *big.Int) []*dkg } return dkgMasterPKs } +func (s *GovernanceStateHelper) GetDKGMasterPublicKeyByProposerID( + round *big.Int, proposerID coreTypes.NodeID) (*dkgTypes.MasterPublicKey, error) { + + for _, mpk := range s.DKGMasterPublicKeys(round) { + x := new(dkgTypes.MasterPublicKey) + if err := rlp.DecodeBytes(mpk, x); err != nil { + panic(err) + } + if x.ProposerID.Equal(proposerID) { + return x, nil + } + } + return nil, errors.New("not found") +} // bytes[][] public dkgComplaints; func (s *GovernanceStateHelper) DKGComplaints(round *big.Int) [][]byte { @@ -1981,12 +2172,48 @@ func (s *GovernanceStateHelper) MinBlockInterval() *big.Int { return s.getStateBigInt(big.NewInt(minBlockIntervalLoc)) } +// uint256[] public fineValues; +func (s *GovernanceStateHelper) FineValue(index *big.Int) *big.Int { + arrayBaseLoc := s.getSlotLoc(big.NewInt(fineValuesLoc)) + return s.getStateBigInt(new(big.Int).Add(arrayBaseLoc, index)) +} +func (s *GovernanceStateHelper) FineValues() []*big.Int { + len := s.getStateBigInt(big.NewInt(fineValuesLoc)) + result := make([]*big.Int, len.Uint64()) + for i := 0; i < int(len.Uint64()); i++ { + result[i] = s.FineValue(big.NewInt(int64(i))) + } + return result +} +func (s *GovernanceStateHelper) SetFineValues(values []*big.Int) { + s.setStateBigInt(big.NewInt(fineValuesLoc), big.NewInt(int64(len(values)))) + + arrayBaseLoc := s.getSlotLoc(big.NewInt(fineValuesLoc)) + for i, v := range values { + s.setStateBigInt(new(big.Int).Add(arrayBaseLoc, big.NewInt(int64(i))), v) + } +} + +// uint256[] public fineRdecords; +func (s *GovernanceStateHelper) FineRecords(recordHash Bytes32) bool { + loc := s.getMapLoc(big.NewInt(finedRecordsLoc), recordHash[:]) + return s.getStateBigInt(loc).Cmp(big.NewInt(0)) > 0 +} +func (s *GovernanceStateHelper) SetFineRecords(recordHash Bytes32, status bool) { + loc := s.getMapLoc(big.NewInt(finedRecordsLoc), recordHash[:]) + value := int64(0) + if status { + value = int64(1) + } + s.setStateBigInt(loc, big.NewInt(value)) +} + // Stake is a helper function for creating genesis state. func (s *GovernanceStateHelper) Stake( addr common.Address, publicKey []byte, staked *big.Int, name, email, location, url string) { offset := s.LenNodes() - s.PushNode(&nodeInfo{ + node := &nodeInfo{ Owner: addr, PublicKey: publicKey, Staked: staked, @@ -1995,8 +2222,23 @@ func (s *GovernanceStateHelper) Stake( Email: email, Location: location, Url: url, + } + s.PushNode(node) + if err := s.PutNodeOffsets(node, offset); err != nil { + panic(err) + } + + if staked.Cmp(big.NewInt(0)) == 0 { + return + } + + offset = s.LenDelegators(addr) + s.PushDelegator(addr, &delegatorInfo{ + Owner: addr, + Value: staked, + UndelegatedAt: big.NewInt(0), }) - s.PutNodesOffset(addr, offset) + s.PutDelegatorOffset(addr, addr, offset) } const phiRatioMultiplier = 1000000.0 @@ -2017,6 +2259,7 @@ func (s *GovernanceStateHelper) Configuration() *params.DexconConfig { DKGSetSize: uint32(s.getStateBigInt(big.NewInt(dkgSetSizeLoc)).Uint64()), RoundInterval: s.getStateBigInt(big.NewInt(roundIntervalLoc)).Uint64(), MinBlockInterval: s.getStateBigInt(big.NewInt(minBlockIntervalLoc)).Uint64(), + FineValues: s.FineValues(), } } @@ -2035,6 +2278,7 @@ func (s *GovernanceStateHelper) UpdateConfiguration(cfg *params.DexconConfig) { s.setStateBigInt(big.NewInt(dkgSetSizeLoc), big.NewInt(int64(cfg.DKGSetSize))) s.setStateBigInt(big.NewInt(roundIntervalLoc), big.NewInt(int64(cfg.RoundInterval))) s.setStateBigInt(big.NewInt(minBlockIntervalLoc), big.NewInt(int64(cfg.MinBlockInterval))) + s.SetFineValues(cfg.FineValues) } type rawConfigStruct struct { @@ -2051,6 +2295,7 @@ type rawConfigStruct struct { DKGSetSize *big.Int RoundInterval *big.Int MinBlockInterval *big.Int + FineValues []*big.Int } // UpdateConfigurationRaw updates system configuration. @@ -2068,6 +2313,7 @@ func (s *GovernanceStateHelper) UpdateConfigurationRaw(cfg *rawConfigStruct) { s.setStateBigInt(big.NewInt(dkgSetSizeLoc), cfg.DKGSetSize) s.setStateBigInt(big.NewInt(roundIntervalLoc), cfg.RoundInterval) s.setStateBigInt(big.NewInt(minBlockIntervalLoc), cfg.MinBlockInterval) + s.SetFineValues(cfg.FineValues) } // event ConfigurationChanged(); @@ -2229,6 +2475,32 @@ func (g *GovernanceContract) addDKGComplaint(round *big.Int, comp []byte) ([]byt return g.penalize() } + mpk, err := g.state.GetDKGMasterPublicKeyByProposerID( + round, dkgComplaint.PrivateShare.ProposerID) + if err != nil { + return g.penalize() + } + + // Verify DKG complaint is correct. + ok, err := coreUtils.VerifyDKGComplaint(&dkgComplaint, mpk) + if !ok || err != nil { + return g.penalize() + } + + // Fine the attacker. + need, err := coreUtils.NeedPenaltyDKGPrivateShare(&dkgComplaint, mpk) + if err != nil { + return g.penalize() + } + if need { + fineValue := g.state.FineValue(big.NewInt(ReportTypeInvalidDKG)) + offset := g.state.NodesOffsetByID(Bytes32(dkgComplaint.PrivateShare.ProposerID.Hash)) + node := g.state.Node(offset) + if err := g.fine(node.Owner, fineValue, comp, nil); err != nil { + return g.penalize() + } + } + g.state.PushDKGComplaint(round, comp) // Set this to relatively high to prevent spamming @@ -2242,7 +2514,7 @@ func (g *GovernanceContract) addDKGMasterPublicKey(round *big.Int, mpk []byte) ( } caller := g.contract.Caller() - offset := g.state.NodesOffset(caller) + offset := g.state.NodesOffsetByAddress(caller) // Can not add dkg mpk if not staked. if offset.Cmp(big.NewInt(0)) < 0 { @@ -2344,7 +2616,7 @@ func (g *GovernanceContract) addDKGFinalize(round *big.Int, finalize []byte) ([] } func (g *GovernanceContract) delegate(nodeAddr common.Address) ([]byte, error) { - offset := g.state.NodesOffset(nodeAddr) + offset := g.state.NodesOffsetByAddress(nodeAddr) if offset.Cmp(big.NewInt(0)) < 0 { return nil, errExecutionReverted } @@ -2401,12 +2673,7 @@ func (g *GovernanceContract) stake( } caller := g.contract.Caller() - offset := g.state.NodesOffset(caller) - - // Check if public key is valid. - if _, err := crypto.UnmarshalPubkey(publicKey); err != nil { - return g.penalize() - } + offset := g.state.NodesOffsetByAddress(caller) // Can not stake if already staked. if offset.Cmp(big.NewInt(0)) >= 0 { @@ -2414,7 +2681,7 @@ func (g *GovernanceContract) stake( } offset = g.state.LenNodes() - g.state.PushNode(&nodeInfo{ + node := &nodeInfo{ Owner: caller, PublicKey: publicKey, Staked: big.NewInt(0), @@ -2423,8 +2690,11 @@ func (g *GovernanceContract) stake( Email: email, Location: location, Url: url, - }) - g.state.PutNodesOffset(caller, offset) + } + g.state.PushNode(node) + if err := g.state.PutNodeOffsets(node, offset); err != nil { + return g.penalize() + } // Delegate fund to itself. if g.contract.Value().Cmp(big.NewInt(0)) > 0 { @@ -2438,7 +2708,7 @@ func (g *GovernanceContract) stake( } func (g *GovernanceContract) undelegateHelper(nodeAddr, caller common.Address) ([]byte, error) { - nodeOffset := g.state.NodesOffset(nodeAddr) + nodeOffset := g.state.NodesOffsetByAddress(nodeAddr) if nodeOffset.Cmp(big.NewInt(0)) < 0 { return nil, errExecutionReverted } @@ -2475,7 +2745,7 @@ func (g *GovernanceContract) undelegate(nodeAddr common.Address) ([]byte, error) func (g *GovernanceContract) withdraw(nodeAddr common.Address) ([]byte, error) { caller := g.contract.Caller() - nodeOffset := g.state.NodesOffset(nodeAddr) + nodeOffset := g.state.NodesOffsetByAddress(nodeAddr) if nodeOffset.Cmp(big.NewInt(0)) < 0 { return nil, errExecutionReverted } @@ -2523,9 +2793,11 @@ func (g *GovernanceContract) withdraw(nodeAddr common.Address) ([]byte, error) { if offset.Cmp(lastIndex) != 0 { lastNode := g.state.Node(lastIndex) g.state.UpdateNode(offset, lastNode) - g.state.PutNodesOffset(lastNode.Owner, offset) + if err := g.state.PutNodeOffsets(lastNode, offset); err != nil { + panic(err) + } } - g.state.DeleteNodesOffset(nodeAddr) + g.state.DeleteNodesOffsetByAddress(nodeAddr) g.state.PopLastNode() } @@ -2534,7 +2806,7 @@ func (g *GovernanceContract) withdraw(nodeAddr common.Address) ([]byte, error) { func (g *GovernanceContract) unstake() ([]byte, error) { caller := g.contract.Caller() - offset := g.state.NodesOffset(caller) + offset := g.state.NodesOffsetByAddress(caller) if offset.Cmp(big.NewInt(0)) < 0 { return nil, errExecutionReverted } @@ -2567,7 +2839,7 @@ func (g *GovernanceContract) unstake() ([]byte, error) { func (g *GovernanceContract) payFine(nodeAddr common.Address) ([]byte, error) { caller := g.contract.Caller() - nodeOffset := g.state.NodesOffset(nodeAddr) + nodeOffset := g.state.NodesOffsetByAddress(nodeAddr) if nodeOffset.Cmp(big.NewInt(0)) < 0 { return nil, errExecutionReverted } @@ -2639,6 +2911,89 @@ func (g *GovernanceContract) proposeCRS(nextRound *big.Int, signedCRS []byte) ([ return g.useGas(0) } +type sortBytes [][]byte + +func (s sortBytes) Less(i, j int) bool { + return bytes.Compare(s[i], s[j]) < 0 +} + +func (s sortBytes) Swap(i, j int) { + s[i], s[j] = s[j], s[i] +} + +func (s sortBytes) Len() int { + return len(s) +} + +func (g *GovernanceContract) fine(nodeAddr common.Address, amount *big.Int, payloads ...[]byte) error { + sort.Sort(sortBytes(payloads)) + + hash := Bytes32(crypto.Keccak256Hash(payloads...)) + if g.state.FineRecords(hash) { + return errors.New("already fined") + } + g.state.SetFineRecords(hash, true) + + nodeOffset := g.state.NodesOffsetByAddress(nodeAddr) + if nodeOffset.Cmp(big.NewInt(0)) < 0 { + return errExecutionReverted + } + + // Set fined value. + node := g.state.Node(nodeOffset) + node.Fined = new(big.Int).Add(node.Fined, amount) + g.state.UpdateNode(nodeOffset, node) + + return nil +} + +func (g *GovernanceContract) report(reportType *big.Int, arg1, arg2 []byte) ([]byte, error) { + typeEnum := ReportType(reportType.Uint64()) + var reportedNodeID coreTypes.NodeID + + switch typeEnum { + case ReportTypeForkVote: + vote1 := new(coreTypes.Vote) + if err := rlp.DecodeBytes(arg1, vote1); err != nil { + return g.penalize() + } + vote2 := new(coreTypes.Vote) + if err := rlp.DecodeBytes(arg2, vote2); err != nil { + return g.penalize() + } + need, err := coreUtils.NeedPenaltyForkVote(vote1, vote2) + if !need || err != nil { + return g.penalize() + } + reportedNodeID = vote1.ProposerID + case ReportTypeForkBlock: + block1 := new(coreTypes.Block) + if err := rlp.DecodeBytes(arg1, block1); err != nil { + return g.penalize() + } + block2 := new(coreTypes.Block) + if err := rlp.DecodeBytes(arg2, block2); err != nil { + return g.penalize() + } + need, err := coreUtils.NeedPenaltyForkBlock(block1, block2) + if !need || err != nil { + return g.penalize() + } + reportedNodeID = block1.ProposerID + default: + return g.penalize() + } + + offset := g.state.NodesOffsetByID(Bytes32(reportedNodeID.Hash)) + node := g.state.Node(offset) + + fineValue := g.state.FineValue(reportType) + if err := g.fine(node.Owner, fineValue, arg1, arg2); err != nil { + return nil, errExecutionReverted + } + return nil, nil +} + func (g *GovernanceContract) transferOwnership(newOwner common.Address) ([]byte, error) { // Only owner can update configuration. if g.contract.Caller() != g.state.Owner() { |