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