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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -54,6 +54,7 @@ func (t *validatorTestSuite) SetupTest() { | |
| nil, | ||
| nil, | ||
| nil, | ||
| nil, | ||
| ) | ||
| t.gomockCtrl = gomockCtrl | ||
| } | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| package services | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "fmt" | ||
|
|
||
| "github.com/Giulio2002/bls" | ||
| "github.com/ledgerwatch/erigon/cl/beacon/beaconevents" | ||
| "github.com/ledgerwatch/erigon/cl/beacon/synced_data" | ||
| "github.com/ledgerwatch/erigon/cl/clparams" | ||
| "github.com/ledgerwatch/erigon/cl/cltypes" | ||
| "github.com/ledgerwatch/erigon/cl/fork" | ||
| "github.com/ledgerwatch/erigon/cl/pool" | ||
| "github.com/ledgerwatch/erigon/cl/utils" | ||
| ) | ||
|
|
||
| type blsToExecutionChangeService struct { | ||
| operationsPool pool.OperationsPool | ||
| emitters *beaconevents.Emitters | ||
| syncedDataManager *synced_data.SyncedDataManager | ||
| beaconCfg *clparams.BeaconChainConfig | ||
| } | ||
|
|
||
| func NewBLSToExecutionChangeService( | ||
| operationsPool pool.OperationsPool, | ||
| emitters *beaconevents.Emitters, | ||
| syncedDataManager *synced_data.SyncedDataManager, | ||
| beaconCfg *clparams.BeaconChainConfig, | ||
| ) BLSToExecutionChangeService { | ||
| return &blsToExecutionChangeService{ | ||
| operationsPool: operationsPool, | ||
| emitters: emitters, | ||
| syncedDataManager: syncedDataManager, | ||
| beaconCfg: beaconCfg, | ||
| } | ||
| } | ||
|
|
||
| func (s *blsToExecutionChangeService) ProcessMessage(ctx context.Context, subnet *uint64, msg *cltypes.SignedBLSToExecutionChange) error { | ||
| defer s.emitters.Publish("bls_to_execution_change", msg) | ||
|
|
||
| // [IGNORE] The signed_bls_to_execution_change is the first valid signed bls to execution change received | ||
| // for the validator with index signed_bls_to_execution_change.message.validator_index. | ||
| if s.operationsPool.BLSToExecutionChangesPool.Has(msg.Signature) { | ||
| return nil | ||
| } | ||
| change := msg.Message | ||
|
|
||
| state := s.syncedDataManager.HeadState() | ||
| if state == nil { | ||
| return nil | ||
| } | ||
|
|
||
| // [IGNORE] current_epoch >= CAPELLA_FORK_EPOCH, where current_epoch is defined by the current wall-clock time. | ||
| if !(state.Version() >= clparams.CapellaVersion) { | ||
| return ErrIgnore | ||
| } | ||
|
|
||
| // ref: https://github.com/ethereum/consensus-specs/blob/dev/specs/capella/beacon-chain.md#new-process_bls_to_execution_change | ||
| // assert address_change.validator_index < len(state.validators) | ||
| validator, err := state.ValidatorForValidatorIndex(int(change.ValidatorIndex)) | ||
| if err != nil { | ||
| return fmt.Errorf("unable to retrieve state: %v", err) | ||
| } | ||
| wc := validator.WithdrawalCredentials() | ||
|
|
||
| // assert validator.withdrawal_credentials[:1] == BLS_WITHDRAWAL_PREFIX | ||
| if wc[0] != byte(s.beaconCfg.BLSWithdrawalPrefixByte) { | ||
| return fmt.Errorf("invalid withdrawal credentials prefix") | ||
| } | ||
|
|
||
| // assert validator.withdrawal_credentials[1:] == hash(address_change.from_bls_pubkey)[1:] | ||
| // Perform full validation if requested. | ||
| // Check the validator's withdrawal credentials against the provided message. | ||
| hashedFrom := utils.Sha256(change.From[:]) | ||
| if !bytes.Equal(hashedFrom[1:], wc[1:]) { | ||
| return fmt.Errorf("invalid withdrawal credentials") | ||
| } | ||
|
|
||
| // assert bls.Verify(address_change.from_bls_pubkey, signing_root, signed_address_change.signature) | ||
| genesisValidatorRoot := state.GenesisValidatorsRoot() | ||
| domain, err := fork.ComputeDomain(s.beaconCfg.DomainBLSToExecutionChange[:], utils.Uint32ToBytes4(uint32(s.beaconCfg.GenesisForkVersion)), genesisValidatorRoot) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| signedRoot, err := fork.ComputeSigningRoot(change, domain) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| valid, err := bls.Verify(msg.Signature[:], signedRoot[:], change.From[:]) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if !valid { | ||
| return fmt.Errorf("invalid signature") | ||
| } | ||
| s.operationsPool.BLSToExecutionChangesPool.Insert(msg.Signature, msg) | ||
| return nil | ||
| } |
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55 changes: 55 additions & 0 deletions
55
cl/phase1/network/services/mock_services/bls_to_execution_change_service_mock.go
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