/
sign_essence.go
47 lines (37 loc) · 1.58 KB
/
sign_essence.go
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package transaction
import (
iotago "github.com/iotaledger/iota.go/v3"
"github.com/iotaledger/wasp/packages/cryptolib"
)
// alternateSignEssence is basically a 1:1 copy of iota.go with the difference that you can inject your own AddressSigner.
// This will ignore passed addressKeys and only use the passed AddressSigner.
// This is important for HW-wallets where the private key is unknown.
func alternateSignEssence(essence *iotago.TransactionEssence, inputsCommitment []byte, signer iotago.AddressSigner, addrKeys ...iotago.AddressKeys) ([]iotago.Signature, error) {
// SignBytes produces signatures signing the essence for every given AddressKeys.
// The produced signatures are in the same order as the AddressKeys.
if inputsCommitment == nil || len(inputsCommitment) != iotago.InputsCommitmentLength {
return nil, iotago.ErrInvalidInputsCommitment
}
copy(essence.InputsCommitment[:], inputsCommitment)
signMsg, err := essence.SigningMessage()
if err != nil {
return nil, err
}
sigs := make([]iotago.Signature, len(addrKeys))
if signer == nil {
signer = iotago.NewInMemoryAddressSigner(addrKeys...)
}
for i, v := range addrKeys {
sig, err := signer.Sign(v.Address, signMsg)
if err != nil {
return nil, err
}
sigs[i] = sig
}
return sigs, nil
}
func SignEssence(essence *iotago.TransactionEssence, inputsCommitment []byte, keyPair cryptolib.VariantKeyPair) ([]iotago.Signature, error) {
signer := keyPair.AsAddressSigner()
addressKeys := keyPair.AddressKeysForEd25519Address(keyPair.Address())
return alternateSignEssence(essence, inputsCommitment, signer, addressKeys)
}