github.com/stafiprotocol/go-substrate-rpc-client@v1.4.7/types/example_tuple_test.go (about)

     1  // Go Substrate RPC Client (GSRPC) provides APIs and types around Polkadot and any Substrate-based chain RPC calls
     2  //
     3  // Copyright 2020 Stafi Protocol
     4  //
     5  // Licensed under the Apache License, Version 2.0 (the "License");
     6  // you may not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing, software
    12  // distributed under the License is distributed on an "AS IS" BASIS,
    13  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  // See the License for the specific language governing permissions and
    15  // limitations under the License.
    16  
    17  package types_test
    18  
    19  import (
    20  	"fmt"
    21  
    22  	. "github.com/stafiprotocol/go-substrate-rpc-client/types"
    23  
    24  	"golang.org/x/crypto/blake2b"
    25  )
    26  
    27  func ExampleExampleTuple() {
    28  	// This represents a document tuple of types [uint64, hash]
    29  	type Doc struct {
    30  		ID   U64
    31  		Hash Hash
    32  	}
    33  
    34  	doc := Doc{12, blake2b.Sum256([]byte("My document"))}
    35  
    36  	encoded, err := EncodeToHexString(doc)
    37  	if err != nil {
    38  		panic(err)
    39  	}
    40  	fmt.Println(encoded)
    41  
    42  	var decoded Doc
    43  	err = DecodeFromHexString(encoded, &decoded)
    44  	if err != nil {
    45  		panic(err)
    46  	}
    47  	fmt.Println(decoded)
    48  	// Output: 0x0c000000000000009199a254aedc9d92a3157cd27bd21ceccc1e2ecee5760788663a3e523bc1a759
    49  	// {12 [145 153 162 84 174 220 157 146 163 21 124 210 123 210 28 236 204 30 46 206 229 118 7 136 102 58 62 82 59 193 167 89]}
    50  }