ipld-eth-server/pkg/history/populate_headers.go

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package history
import (
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log "github.com/sirupsen/logrus"
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"github.com/vulcanize/vulcanizedb/pkg/core"
"github.com/vulcanize/vulcanizedb/pkg/datastore"
"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
)
func PopulateMissingHeaders(blockchain core.BlockChain, headerRepository datastore.HeaderRepository, startingBlockNumber int64) (int, error) {
lastBlock := blockchain.LastBlock().Int64()
headerAlreadyExists, err := headerRepository.HeaderExists(lastBlock)
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if err != nil {
return 0, err
} else if headerAlreadyExists {
return 0, nil
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}
blockNumbers := headerRepository.MissingBlockNumbers(startingBlockNumber, lastBlock, blockchain.Node().ID)
log.Printf("Backfilling %d blocks\n\n", len(blockNumbers))
_, err = RetrieveAndUpdateHeaders(blockchain, headerRepository, blockNumbers)
if err != nil {
return 0, err
}
return len(blockNumbers), nil
}
func RetrieveAndUpdateHeaders(chain core.BlockChain, headerRepository datastore.HeaderRepository, blockNumbers []int64) (int, error) {
for _, blockNumber := range blockNumbers {
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header, err := chain.GetHeaderByNumber(blockNumber)
if err != nil {
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return 0, err
}
_, err = headerRepository.CreateOrUpdateHeader(header)
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if err != nil {
if err == repositories.ErrValidHeaderExists {
continue
}
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return 0, err
}
}
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return len(blockNumbers), nil
}