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 }