/
decoder.go
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/
decoder.go
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// Copyright 2021 dfuse Platform Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package codec
import (
"fmt"
"google.golang.org/protobuf/proto"
pbcodec "github.com/ChainSafe/firehose-arweave/pb/sf/arweave/type/v1"
"github.com/streamingfast/bstream"
pbbstream "github.com/streamingfast/pbgo/sf/bstream/v1"
)
func BlockDecoder(blk *bstream.Block) (interface{}, error) {
if blk.Kind() != pbbstream.Protocol_UNKNOWN {
return nil, fmt.Errorf("expected kind %s, got %s", pbbstream.Protocol_UNKNOWN, blk.Kind())
}
if blk.Version() != 1 {
return nil, fmt.Errorf("this decoder only knows about version 1, got %d", blk.Version())
}
block := new(pbcodec.Block)
payload, err := blk.Payload.Get()
if err != nil {
return nil, fmt.Errorf("getting payload: %w", err)
}
err = proto.Unmarshal(payload, block)
if err != nil {
return nil, fmt.Errorf("unable to decode payload: %w", err)
}
return block, nil
}