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block_reader.go
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/
block_reader.go
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// Copyright (c) 2018 The VeChainThor developers
// Copyright (c) 2019 The PlayMaker developers
// Distributed under the GNU Lesser General Public License v3.0 software license, see the accompanying
// file LICENSE or <https://www.gnu.org/licenses/lgpl-3.0.html>
package subscriptions
import (
"github.com/playmakerchain/powerplay/chain"
"github.com/playmakerchain/powerplay/powerplay"
)
type blockReader struct {
chain *chain.Chain
blockReader chain.BlockReader
}
func newBlockReader(chain *chain.Chain, position powerplay.Bytes32) *blockReader {
return &blockReader{
chain: chain,
blockReader: chain.NewBlockReader(position),
}
}
func (br *blockReader) Read() ([]interface{}, bool, error) {
blocks, err := br.blockReader.Read()
if err != nil {
return nil, false, err
}
var msgs []interface{}
for _, block := range blocks {
msg, err := convertBlock(block)
if err != nil {
return nil, false, err
}
msgs = append(msgs, msg)
}
return msgs, len(blocks) > 0, nil
}