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package types
import (
"bytes"
"io"
cmn "github.com/tendermint/tmlibs/common"
"github.com/tendermint/tmlibs/merkle"
)
// Signable is an interface for all signable things.
// It typically removes signatures before serializing.
type Signable interface {
WriteSignBytes(chainID string, w io.Writer, n *int, err *error)
}
// SignBytes is a convenience method for getting the bytes to sign of a Signable.
func SignBytes(chainID string, o Signable) []byte {
buf, n, err := new(bytes.Buffer), new(int), new(error)
o.WriteSignBytes(chainID, buf, n, err)
if *err != nil {
cmn.PanicCrisis(err)
}
return buf.Bytes()
}
// HashSignBytes is a convenience method for getting the hash of the bytes of a signable
func HashSignBytes(chainID string, o Signable) []byte {
return merkle.SimpleHashFromBinary(SignBytes(chainID, o))
}