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84 lines
2.4 KiB
84 lines
2.4 KiB
package block
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import (
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"io"
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"reflect"
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ethcommon "github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/harmony-one/taggedrlp"
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"github.com/pkg/errors"
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"github.com/rs/zerolog"
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blockif "github.com/harmony-one/harmony/block/interface"
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v0 "github.com/harmony-one/harmony/block/v0"
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v1 "github.com/harmony-one/harmony/block/v1"
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"github.com/harmony-one/harmony/crypto/hash"
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)
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// Header represents a block header in the Harmony blockchain.
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type Header struct {
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blockif.Header
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}
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// EncodeRLP encodes the header using tagged RLP representation.
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func (h *Header) EncodeRLP(w io.Writer) error {
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return HeaderRegistry.Encode(w, h.Header)
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}
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// DecodeRLP decodes the header using tagged RLP representation.
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func (h *Header) DecodeRLP(s *rlp.Stream) error {
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decoded, err := HeaderRegistry.Decode(s)
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if err != nil {
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return err
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}
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hif, ok := decoded.(blockif.Header)
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if !ok {
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return errors.Errorf(
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"decoded object (type %s) does not implement Header interface",
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taggedrlp.TypeName(reflect.TypeOf(decoded)))
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}
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h.Header = hif
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return nil
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}
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// Hash returns the block hash of the header. This uses HeaderRegistry to
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// choose and return the right tagged RLP form of the header.
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func (h *Header) Hash() ethcommon.Hash {
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return hash.FromRLP(h)
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}
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// Logger returns a sub-logger with block contexts added.
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func (h *Header) Logger(logger *zerolog.Logger) *zerolog.Logger {
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nlogger := logger.With().
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Str("blockHash", h.Hash().Hex()).
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Uint32("blockShard", h.ShardID()).
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Uint64("blockEpoch", h.Epoch().Uint64()).
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Uint64("blockNumber", h.Number().Uint64()).
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Logger()
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return &nlogger
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}
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// With returns a field setter context for the header.
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//
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// Call a chain of setters on the returned field setter, followed by a call of
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// Header method. Example:
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//
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// header := NewHeader(epoch).With().
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// ParentHash(parent.Hash()).
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// ShardID(parent.ShardID()).
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// Number(new(big.Int).Add(parent.Number(), big.NewInt(1)).
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// Header()
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func (h *Header) With() HeaderFieldSetter {
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return HeaderFieldSetter{h: h}
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}
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// HeaderRegistry is the taggedrlp type registry for versioned headers.
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var HeaderRegistry = taggedrlp.NewRegistry()
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func init() {
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HeaderRegistry.MustRegister(taggedrlp.LegacyTag, v0.NewHeader())
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HeaderRegistry.MustAddFactory(func() interface{} { return v0.NewHeader() })
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HeaderRegistry.MustRegister("v1", v1.NewHeader())
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HeaderRegistry.MustAddFactory(func() interface{} { return v1.NewHeader() })
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}
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