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35 lines
977 B
35 lines
977 B
6 years ago
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package shardchain
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import (
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"fmt"
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"path"
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"github.com/ethereum/go-ethereum/ethdb"
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)
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// DBFactory is a blockchain database factory.
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type DBFactory interface {
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// NewChainDB returns a new database for the blockchain for
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// given shard.
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NewChainDB(shardID uint32) (ethdb.Database, error)
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}
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// LDBFactory is a LDB-backed blockchain database factory.
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type LDBFactory struct {
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RootDir string // directory in which to put shard databases in.
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}
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// NewChainDB returns a new LDB for the blockchain for given shard.
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func (f *LDBFactory) NewChainDB(shardID uint32) (ethdb.Database, error) {
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dir := path.Join(f.RootDir, fmt.Sprintf("harmony_db_%d", shardID))
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return ethdb.NewLDBDatabase(dir, 0, 0)
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}
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// MemDBFactory is a memory-backed blockchain database factory.
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type MemDBFactory struct{}
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// NewChainDB returns a new memDB for the blockchain for given shard.
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func (f *MemDBFactory) NewChainDB(shardID uint32) (ethdb.Database, error) {
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return ethdb.NewMemDatabase(), nil
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}
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