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