forked from TrueCloudLab/neoneo-go
101 lines
3.8 KiB
Go
101 lines
3.8 KiB
Go
/*
|
|
Package std provides interface to StdLib native contract.
|
|
It implements various useful conversion functions.
|
|
*/
|
|
package std
|
|
|
|
import (
|
|
"github.com/nspcc-dev/neo-go/pkg/interop"
|
|
"github.com/nspcc-dev/neo-go/pkg/interop/contract"
|
|
)
|
|
|
|
// Hash represents StdLib contract hash.
|
|
const Hash = "\xc0\xef\x39\xce\xe0\xe4\xe9\x25\xc6\xc2\xa0\x6a\x79\xe1\x44\x0d\xd8\x6f\xce\xac"
|
|
|
|
// Serialize calls `serialize` method of StdLib native contract and serializes
|
|
// any given item into a byte slice. It works for all regular VM types (not ones
|
|
// from interop package) and allows to save them in storage or pass into Notify
|
|
// and then Deserialize them on the next run or in the external event receiver.
|
|
func Serialize(item interface{}) []byte {
|
|
return contract.Call(interop.Hash160(Hash), "serialize", contract.NoneFlag,
|
|
item).([]byte)
|
|
}
|
|
|
|
// Deserialize calls `deserialize` method of StdLib native contract and unpacks
|
|
// previously serialized value from a byte slice, it's the opposite of Serialize.
|
|
func Deserialize(b []byte) interface{} {
|
|
return contract.Call(interop.Hash160(Hash), "deserialize", contract.NoneFlag,
|
|
b)
|
|
}
|
|
|
|
// JSONSerialize serializes value to json. It uses `jsonSerialize` method of StdLib native
|
|
// contract.
|
|
// Serialization format is the following:
|
|
// []byte -> base64 string
|
|
// bool -> json boolean
|
|
// nil -> Null
|
|
// string -> base64 encoded sequence of underlying bytes
|
|
// (u)int* -> integer, only value in -2^53..2^53 are allowed
|
|
// []interface{} -> json array
|
|
// map[type1]type2 -> json object with string keys marshaled as strings (not base64).
|
|
func JSONSerialize(item interface{}) []byte {
|
|
return contract.Call(interop.Hash160(Hash), "jsonSerialize", contract.NoneFlag,
|
|
item).([]byte)
|
|
}
|
|
|
|
// JSONDeserialize deserializes value from json. It uses `jsonDeserialize` method of StdLib
|
|
// native contract.
|
|
// It performs deserialization as follows:
|
|
// strings -> []byte (string) from base64
|
|
// integers -> (u)int* types
|
|
// null -> interface{}(nil)
|
|
// arrays -> []interface{}
|
|
// maps -> map[string]interface{}
|
|
func JSONDeserialize(data []byte) interface{} {
|
|
return contract.Call(interop.Hash160(Hash), "jsonDeserialize", contract.NoneFlag,
|
|
data)
|
|
}
|
|
|
|
// Base64Encode calls `base64Encode` method of StdLib native contract and encodes
|
|
// given byte slice into a base64 string and returns byte representation of this
|
|
// string.
|
|
func Base64Encode(b []byte) string {
|
|
return contract.Call(interop.Hash160(Hash), "base64Encode", contract.NoneFlag,
|
|
b).(string)
|
|
}
|
|
|
|
// Base64Decode calls `base64Decode` method of StdLib native contract and decodes
|
|
// given base64 string represented as a byte slice into byte slice.
|
|
func Base64Decode(b []byte) []byte {
|
|
return contract.Call(interop.Hash160(Hash), "base64Decode", contract.NoneFlag,
|
|
b).([]byte)
|
|
}
|
|
|
|
// Base58Encode calls `base58Encode` method of StdLib native contract and encodes
|
|
// given byte slice into a base58 string and returns byte representation of this
|
|
// string.
|
|
func Base58Encode(b []byte) string {
|
|
return contract.Call(interop.Hash160(Hash), "base58Encode", contract.NoneFlag,
|
|
b).(string)
|
|
}
|
|
|
|
// Base58Decode calls `base58Decode` method of StdLib native contract and decodes
|
|
// given base58 string represented as a byte slice into a new byte slice.
|
|
func Base58Decode(b []byte) []byte {
|
|
return contract.Call(interop.Hash160(Hash), "base58Decode", contract.NoneFlag,
|
|
b).([]byte)
|
|
}
|
|
|
|
// Itoa converts num in a given base to string. Base should be either 10 or 16.
|
|
// It uses `itoa` method of StdLib native contract.
|
|
func Itoa(num int, base int) string {
|
|
return contract.Call(interop.Hash160(Hash), "itoa", contract.NoneFlag,
|
|
num, base).(string)
|
|
}
|
|
|
|
// Atoi converts string to a number in a given base. Base should be either 10 or 16.
|
|
// It uses `atoi` method of StdLib native contract.
|
|
func Atoi(s string, base int) int {
|
|
return contract.Call(interop.Hash160(Hash), "atoi", contract.NoneFlag,
|
|
s, base).(int)
|
|
}
|