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https://gitlab.com/pulsechaincom/erigon-pulse.git
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84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
package ethdb
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import (
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"context"
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"errors"
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"github.com/ledgerwatch/turbo-geth/common"
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)
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var (
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ErrAttemptToDeleteNonDeprecatedBucket = errors.New("only buckets from dbutils.DeprecatedBuckets can be deleted")
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ErrUnknownBucket = errors.New("unknown bucket. add it to dbutils.Buckets")
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)
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type KV interface {
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View(ctx context.Context, f func(tx Tx) error) error
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Update(ctx context.Context, f func(tx Tx) error) error
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Close()
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Begin(ctx context.Context, parent Tx, writable bool) (Tx, error)
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IdealBatchSize() int
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}
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type Tx interface {
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Cursor(bucket string) Cursor
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Get(bucket string, key []byte) (val []byte, err error)
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Commit(ctx context.Context) error
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Rollback()
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BucketSize(name string) (uint64, error)
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}
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// Interface used for buckets migration, don't use it in usual app code
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type BucketMigrator interface {
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DropBucket(string) error
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CreateBucket(string) error
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ExistsBucket(string) bool
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ClearBucket(string) error
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ExistingBuckets() ([]string, error)
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}
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type Cursor interface {
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Prefix(v []byte) Cursor
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MatchBits(uint) Cursor
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Prefetch(v uint) Cursor
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NoValues() NoValuesCursor
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First() ([]byte, []byte, error)
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Seek(seek []byte) ([]byte, []byte, error)
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SeekExact(key []byte) ([]byte, error)
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Next() ([]byte, []byte, error)
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Last() ([]byte, []byte, error)
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Walk(walker func(k, v []byte) (bool, error)) error
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Put(key []byte, value []byte) error
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Delete(key []byte) error
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Append(key []byte, value []byte) error // Danger: if provided data will not sorted (or bucket have old records which mess with new in sorting manner) - db will corrupt. Method also doesn't tolerate duplicates.
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}
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type NoValuesCursor interface {
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First() ([]byte, uint32, error)
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Seek(seek []byte) ([]byte, uint32, error)
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Next() ([]byte, uint32, error)
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Walk(walker func(k []byte, vSize uint32) (bool, error)) error
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}
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type HasStats interface {
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DiskSize(context.Context) (uint64, error) // db size
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}
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type Backend interface {
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AddLocal([]byte) ([]byte, error)
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Etherbase() (common.Address, error)
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NetVersion() (uint64, error)
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}
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type DbProvider uint8
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const (
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Bolt DbProvider = iota
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Remote
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Lmdb
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)
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