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package proxy
import (
"bytes"
"github.com/pkg/errors"
"github.com/tendermint/tendermint/lite"
certerr "github.com/tendermint/tendermint/lite/errors"
"github.com/tendermint/tendermint/types"
)
func ValidateBlockMeta(meta *types.BlockMeta, check lite.Commit) error {
if meta == nil {
return errors.New("expecting a non-nil BlockMeta")
}
// TODO: check the BlockID??
return ValidateHeader(meta.Header, check)
}
func ValidateBlock(meta *types.Block, check lite.Commit) error {
if meta == nil {
return errors.New("expecting a non-nil Block")
}
err := ValidateHeader(meta.Header, check)
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, check lite.Commit) error {
if head == nil {
return errors.New("expecting a non-nil Header")
}
// make sure they are for the same height (obvious fail)
if head.Height != check.Height() {
return certerr.ErrHeightMismatch(head.Height, check.Height())
}
// check if they are equal by using hashes
chead := check.Header
if !bytes.Equal(head.Hash(), chead.Hash()) {
return errors.New("Headers don't match")
}
return nil
}