forked from cerc-io/ipld-eth-server
85 lines
2.8 KiB
Go
85 lines
2.8 KiB
Go
package repositories
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import (
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"database/sql"
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"errors"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
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)
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var ErrValidHeaderExists = errors.New("valid header already exists")
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type HeaderRepository struct {
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database *postgres.DB
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}
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func NewHeaderRepository(database *postgres.DB) HeaderRepository {
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return HeaderRepository{database: database}
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}
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func (repository HeaderRepository) CreateOrUpdateHeader(header core.Header) (int64, error) {
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hash, err := repository.getHeaderHash(header)
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if err != nil {
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if headerDoesNotExist(err) {
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return repository.insertHeader(header)
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}
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return 0, err
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}
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if headerMustBeReplaced(hash, header) {
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return repository.replaceHeader(header)
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}
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return 0, ErrValidHeaderExists
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}
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func (repository HeaderRepository) GetHeader(blockNumber int64) (core.Header, error) {
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var header core.Header
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err := repository.database.Get(&header, `SELECT block_number, hash, raw FROM headers WHERE block_number = $1 AND eth_node_fingerprint = $2`,
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blockNumber, repository.database.Node.ID)
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return header, err
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}
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func (repository HeaderRepository) MissingBlockNumbers(startingBlockNumber, endingBlockNumber int64, nodeID string) []int64 {
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numbers := make([]int64, 0)
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repository.database.Select(&numbers, `SELECT all_block_numbers
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FROM (
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SELECT generate_series($1::INT, $2::INT) AS all_block_numbers) series
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WHERE all_block_numbers NOT IN (
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SELECT block_number FROM headers WHERE eth_node_fingerprint = $3
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) `,
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startingBlockNumber, endingBlockNumber, nodeID)
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return numbers
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}
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func headerMustBeReplaced(hash string, header core.Header) bool {
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return hash != header.Hash
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}
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func headerDoesNotExist(err error) bool {
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return err == sql.ErrNoRows
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}
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func (repository HeaderRepository) getHeaderHash(header core.Header) (string, error) {
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var hash string
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err := repository.database.Get(&hash, `SELECT hash FROM headers WHERE block_number = $1 AND eth_node_fingerprint = $2`,
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header.BlockNumber, repository.database.Node.ID)
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return hash, err
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}
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func (repository HeaderRepository) insertHeader(header core.Header) (int64, error) {
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var headerId int64
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err := repository.database.QueryRowx(
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`INSERT INTO public.headers (block_number, hash, block_timestamp, raw, eth_node_id, eth_node_fingerprint) VALUES ($1, $2, $3::NUMERIC, $4, $5, $6) RETURNING id`,
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header.BlockNumber, header.Hash, header.Timestamp, header.Raw, repository.database.NodeID, repository.database.Node.ID).Scan(&headerId)
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return headerId, err
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}
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func (repository HeaderRepository) replaceHeader(header core.Header) (int64, error) {
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_, err := repository.database.Exec(`DELETE FROM headers WHERE block_number = $1 AND eth_node_fingerprint = $2`,
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header.BlockNumber, repository.database.Node.ID)
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if err != nil {
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return 0, err
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}
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return repository.insertHeader(header)
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}
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