package types import ( "bytes" "errors" "fmt" tmproto "github.com/tendermint/tendermint/proto/tendermint/types" ) // BlockMeta contains meta information. type BlockMeta struct { BlockID BlockID `json:"block_id"` BlockSize int `json:"block_size"` Header Header `json:"header"` NumTxs int `json:"num_txs"` } // NewBlockMeta returns a new BlockMeta. func NewBlockMeta(block *Block, blockParts *PartSet) *BlockMeta { return &BlockMeta{ BlockID: BlockID{block.Hash(), blockParts.Header()}, BlockSize: block.Size(), Header: block.Header, NumTxs: len(block.Data.Txs), } } func (bm *BlockMeta) ToProto() *tmproto.BlockMeta { if bm == nil { return nil } pb := &tmproto.BlockMeta{ BlockID: bm.BlockID.ToProto(), BlockSize: int64(bm.BlockSize), Header: *bm.Header.ToProto(), NumTxs: int64(bm.NumTxs), } return pb } func BlockMetaFromProto(pb *tmproto.BlockMeta) (*BlockMeta, error) { if pb == nil { return nil, errors.New("blockmeta is empty") } bm := new(BlockMeta) bi, err := BlockIDFromProto(&pb.BlockID) if err != nil { return nil, err } h, err := HeaderFromProto(&pb.Header) if err != nil { return nil, err } bm.BlockID = *bi bm.BlockSize = int(pb.BlockSize) bm.Header = h bm.NumTxs = int(pb.NumTxs) return bm, bm.ValidateBasic() } // ValidateBasic performs basic validation. func (bm *BlockMeta) ValidateBasic() error { if err := bm.BlockID.ValidateBasic(); err != nil { return err } if !bytes.Equal(bm.BlockID.Hash, bm.Header.Hash()) { return fmt.Errorf("expected BlockID#Hash and Header#Hash to be the same, got %X != %X", bm.BlockID.Hash, bm.Header.Hash()) } return nil }