forked from TrueCloudLab/neoneo-go
30836ca69b
The notion of NativeContractState shouldn't ever existed, native contract is a contract and its state is saved as regular contract state which is critical because we'll have MPT calculations over this state soon. Initial minting should be done in Neo.Native.Deploy because it generates notification that should have proper transaction context. RegisterNative() shouldn't exist as a public method, native contracts are only registered at block 0 and they can do it internally, no outside user should be able to mess with it. Move some structures from `native` package to `interop` also to avoid circular references as interop.Context has to have a list of native contracts (exposing them via Blockchainer is again too dangerous, it's too powerful tool).
99 lines
2.6 KiB
Go
99 lines
2.6 KiB
Go
package storage
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import (
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"encoding/binary"
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"errors"
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)
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// KeyPrefix constants.
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const (
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DataBlock KeyPrefix = 0x01
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DataTransaction KeyPrefix = 0x02
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STAccount KeyPrefix = 0x40
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STCoin KeyPrefix = 0x44
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STSpentCoin KeyPrefix = 0x45
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STNextValidators KeyPrefix = 0x47
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STValidator KeyPrefix = 0x48
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STAsset KeyPrefix = 0x4c
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STNotification KeyPrefix = 0x4d
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STContract KeyPrefix = 0x50
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STStorage KeyPrefix = 0x70
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STNEP5Transfers KeyPrefix = 0x72
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STNEP5Balances KeyPrefix = 0x73
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IXHeaderHashList KeyPrefix = 0x80
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IXValidatorsCount KeyPrefix = 0x90
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SYSCurrentBlock KeyPrefix = 0xc0
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SYSCurrentHeader KeyPrefix = 0xc1
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SYSVersion KeyPrefix = 0xf0
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)
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// ErrKeyNotFound is an error returned by Store implementations
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// when a certain key is not found.
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var ErrKeyNotFound = errors.New("key not found")
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type (
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// Store is anything that can persist and retrieve the blockchain.
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// information.
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Store interface {
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Batch() Batch
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Delete(k []byte) error
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Get([]byte) ([]byte, error)
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Put(k, v []byte) error
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PutBatch(Batch) error
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Seek(k []byte, f func(k, v []byte))
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Close() error
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}
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// Batch represents an abstraction on top of batch operations.
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// Each Store implementation is responsible of casting a Batch
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// to its appropriate type.
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Batch interface {
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Delete(k []byte)
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Put(k, v []byte)
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}
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// KeyPrefix is a constant byte added as a prefix for each key
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// stored.
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KeyPrefix uint8
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)
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// Bytes returns the bytes representation of KeyPrefix.
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func (k KeyPrefix) Bytes() []byte {
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return []byte{byte(k)}
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}
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// AppendPrefix appends byteslice b to the given KeyPrefix.
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// AppendKeyPrefix(SYSVersion, []byte{0x00, 0x01})
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func AppendPrefix(k KeyPrefix, b []byte) []byte {
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dest := make([]byte, len(b)+1)
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dest[0] = byte(k)
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copy(dest[1:], b)
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return dest
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}
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// AppendPrefixInt append int n to the given KeyPrefix.
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//AppendPrefixInt(SYSCurrentHeader, 10001)
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func AppendPrefixInt(k KeyPrefix, n int) []byte {
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b := make([]byte, 4)
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binary.LittleEndian.PutUint32(b, uint32(n))
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return AppendPrefix(k, b)
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}
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// NewStore creates storage with preselected in configuration database type.
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func NewStore(cfg DBConfiguration) (Store, error) {
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var store Store
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var err error
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switch cfg.Type {
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case "leveldb":
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store, err = NewLevelDBStore(cfg.LevelDBOptions)
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case "inmemory":
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store = NewMemoryStore()
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case "redis":
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store, err = NewRedisStore(cfg.RedisDBOptions)
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case "boltdb":
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store, err = NewBoltDBStore(cfg.BoltDBOptions)
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case "badgerdb":
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store, err = NewBadgerDBStore(cfg.BadgerDBOptions)
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}
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return store, err
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}
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