main.go

/*
 * Flow Go SDK
 *
 * Copyright 2019 Dapper Labs, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package main

import (
	"context"
	"fmt"

	"github.com/onflow/flow-go-sdk/access/http"

	"github.com/onflow/flow-go-sdk"
	"github.com/onflow/flow-go-sdk/crypto"
	"github.com/onflow/flow-go-sdk/examples"
	"github.com/onflow/flow-go-sdk/templates"
)

func main() {
	CreateAccountDemo()
}

func CreateAccountDemo() {
	ctx := context.Background()
	flowClient, err := http.NewClient(http.EmulatorHost)
	examples.Handle(err)

	serviceAcctAddr, serviceAcctKey, serviceSigner := examples.ServiceAccount(flowClient)

	myPrivateKey := examples.RandomPrivateKey()
	myAcctKey := flow.NewAccountKey().
		FromPrivateKey(myPrivateKey).
		SetHashAlgo(crypto.SHA3_256).
		SetWeight(flow.AccountKeyWeightThreshold)

	referenceBlockID := examples.GetReferenceBlockId(flowClient)
	createAccountTx, err := templates.CreateAccount([]*flow.AccountKey{myAcctKey}, nil, serviceAcctAddr)
	examples.Handle(err)
	createAccountTx.SetProposalKey(
		serviceAcctAddr,
		serviceAcctKey.Index,
		serviceAcctKey.SequenceNumber,
	)
	createAccountTx.SetReferenceBlockID(referenceBlockID)
	createAccountTx.SetPayer(serviceAcctAddr)

	// Sign the transaction with the service account, which already exists
	// All new accounts must be created by an existing account
	err = createAccountTx.SignEnvelope(serviceAcctAddr, serviceAcctKey.Index, serviceSigner)
	examples.Handle(err)

	// Send the transaction to the network
	err = flowClient.SendTransaction(ctx, *createAccountTx)
	examples.Handle(err)

	accountCreationTxRes := examples.WaitForSeal(ctx, flowClient, createAccountTx.ID())

	var myAddress flow.Address

	for _, event := range accountCreationTxRes.Events {
		if event.Type == flow.EventAccountCreated {
			accountCreatedEvent := flow.AccountCreatedEvent(event)
			myAddress = accountCreatedEvent.Address()
		}
	}

	fmt.Println("Account created with address:", myAddress.Hex())
}