34 lines
1.1 KiB
Go
34 lines
1.1 KiB
Go
package core
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import (
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"github.com/jmoiron/sqlx"
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_ "github.com/lib/pq"
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)
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type BlockchainDBObserver struct {
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Db *sqlx.DB
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}
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func (observer BlockchainDBObserver) NotifyBlockAdded(block Block) {
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insertedBlockId := saveBlock(observer, block)
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saveTransactions(insertedBlockId, block.Transactions, observer)
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}
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func saveBlock(observer BlockchainDBObserver, block Block) int64 {
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insertedBlock := observer.Db.QueryRow("Insert INTO blocks "+
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"(block_number, block_gaslimit, block_gasused, block_time) "+
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"VALUES ($1, $2, $3, $4) RETURNING id",
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block.Number, block.GasLimit, block.GasUsed, block.Time)
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var blockId int64
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insertedBlock.Scan(&blockId)
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return blockId
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}
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func saveTransactions(blockId int64, transactions []Transaction, observer BlockchainDBObserver) {
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for _, transaction := range transactions {
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observer.Db.MustExec("Insert INTO transactions "+
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"(block_id, tx_hash, tx_nonce, tx_to, tx_gaslimit, tx_gasprice, tx_value) VALUES ($1, $2, $3, $4, $5, $6, $7)",
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blockId, transaction.Hash, transaction.Nonce, transaction.To, transaction.GasLimit, transaction.GasPrice, transaction.Value)
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}
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}
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