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preconfs: preconf-commitment duty #114

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preconfs: preconf-commitment duty #114

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34 changes: 34 additions & 0 deletions signer/sign_preconf_commitment.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,34 @@
package signer

import (
"encoding/hex"

"github.com/attestantio/go-eth2-client/spec/phase0"
"github.com/pkg/errors"
)

// TODO - add test(s)
// SignSlot signes the given preconf-commitment data
func (signer *SimpleSigner) SignPreconfCommitment(data []byte, domain phase0.Domain, pubKey []byte) ([]byte, []byte, error) {
if pubKey == nil {
return nil, nil, errors.New("account was not supplied")
}

account, err := signer.wallet.AccountByPublicKey(hex.EncodeToString(pubKey))
if err != nil {
return nil, nil, err
}

sszRoot := SSZBytes(data)
root, err := ComputeETHSigningRoot(sszRoot, domain)
if err != nil {
return nil, nil, err
}

sig, err := account.ValidationKeySign(root[:])
if err != nil {
return nil, nil, err
}

return sig, root[:], nil
}
1 change: 1 addition & 0 deletions signer/validator_signer.go
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@ type ValidatorSigner interface {
SignRegistration(registration *api.VersionedValidatorRegistration, domain phase0.Domain, pubKey []byte) (sig []byte, root []byte, err error)
SignVoluntaryExit(voluntaryExit *phase0.VoluntaryExit, domain phase0.Domain, pubKey []byte) (sig []byte, root []byte, err error)
SignBLSToExecutionChange(blsToExecutionChange *capella.BLSToExecutionChange, domain phase0.Domain, pubKey []byte) (sig []byte, root []byte, err error)
SignPreconfCommitment(data []byte, domain phase0.Domain, pubKey []byte) (sig []byte, root []byte, err error)
}

// SimpleSigner implements ValidatorSigner interface
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