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parser.go
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parser.go
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// Copyright (C) 2019-2023, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package blocks
import (
"fmt"
"reflect"
"github.com/ava-labs/avalanchego/codec"
"github.com/ava-labs/avalanchego/utils/logging"
"github.com/ava-labs/avalanchego/utils/timer/mockable"
"github.com/ava-labs/avalanchego/utils/wrappers"
"github.com/ava-labs/avalanchego/vms/avm/fxs"
"github.com/ava-labs/avalanchego/vms/avm/txs"
)
// CodecVersion is the current default codec version
const CodecVersion = txs.CodecVersion
var _ Parser = (*parser)(nil)
type Parser interface {
txs.Parser
ParseBlock(bytes []byte) (Block, error)
ParseGenesisBlock(bytes []byte) (Block, error)
InitializeBlock(block Block) error
InitializeGenesisBlock(block Block) error
}
type parser struct {
txs.Parser
}
func NewParser(fxs []fxs.Fx) (Parser, error) {
p, err := txs.NewParser(fxs)
if err != nil {
return nil, err
}
c := p.CodecRegistry()
gc := p.GenesisCodecRegistry()
errs := wrappers.Errs{}
errs.Add(
c.RegisterType(&StandardBlock{}),
gc.RegisterType(&StandardBlock{}),
)
return &parser{
Parser: p,
}, errs.Err
}
func NewCustomParser(
typeToFxIndex map[reflect.Type]int,
clock *mockable.Clock,
log logging.Logger,
fxs []fxs.Fx,
) (Parser, error) {
p, err := txs.NewCustomParser(typeToFxIndex, clock, log, fxs)
if err != nil {
return nil, err
}
c := p.CodecRegistry()
gc := p.GenesisCodecRegistry()
errs := wrappers.Errs{}
errs.Add(
c.RegisterType(&StandardBlock{}),
gc.RegisterType(&StandardBlock{}),
)
return &parser{
Parser: p,
}, errs.Err
}
func (p *parser) ParseBlock(bytes []byte) (Block, error) {
return parse(p.Codec(), bytes)
}
func (p *parser) ParseGenesisBlock(bytes []byte) (Block, error) {
return parse(p.GenesisCodec(), bytes)
}
func parse(cm codec.Manager, bytes []byte) (Block, error) {
var blk Block
if _, err := cm.Unmarshal(bytes, &blk); err != nil {
return nil, err
}
return blk, blk.initialize(bytes, cm)
}
func (p *parser) InitializeBlock(block Block) error {
return initialize(block, p.Codec())
}
func (p *parser) InitializeGenesisBlock(block Block) error {
return initialize(block, p.GenesisCodec())
}
func initialize(blk Block, cm codec.Manager) error {
// We serialize this block as a pointer so that it can be deserialized into
// a Block
bytes, err := cm.Marshal(CodecVersion, &blk)
if err != nil {
return fmt.Errorf("couldn't marshal block: %w", err)
}
return blk.initialize(bytes, cm)
}