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package proxy
import (
"bytes"
"errors"
"github.com/tendermint/tendermint/types"
)
func ValidateBlockMeta(meta *types.BlockMeta, sh types.SignedHeader) error {
if meta == nil {
return errors.New("expecting a non-nil BlockMeta")
}
// TODO: check the BlockID??
return ValidateHeader(meta.Header, sh)
}
func ValidateBlock(meta *types.Block, sh types.SignedHeader) error {
if meta == nil {
return errors.New("expecting a non-nil Block")
}
err := ValidateHeader(meta.Header, sh)
if err != nil {
return err
}
if !bytes.Equal(meta.Data.Hash(), meta.Header.DataHash) {
return errors.New("Data hash doesn't match header")
}
return nil
}
func ValidateHeader(head *types.Header, sh types.SignedHeader) error {
if head == nil {
return errors.New("expecting a non-nil Header")
}
if sh.Header == nil {
return errors.New("unexpected empty SignedHeader")
}
// Make sure they are for the same height (obvious fail).
if head.Height != sh.Height {
return errors.New("Header heights mismatched")
}
// Check if they are equal by using hashes.
if !bytes.Equal(head.Hash(), sh.Hash()) {
return errors.New("Headers don't match")
}
return nil
}