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main.go
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main.go
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/*
* Flow Go SDK
*
* Copyright 2019-2020 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/cadence"
"google.golang.org/grpc"
"github.com/onflow/flow-go-sdk"
"github.com/onflow/flow-go-sdk/client"
"github.com/onflow/flow-go-sdk/crypto/cloudkms"
"github.com/onflow/flow-go-sdk/examples"
"github.com/onflow/flow-go-sdk/test"
)
func main() {
GoogleCloudKMSDemo()
}
func GoogleCloudKMSDemo() {
ctx := context.Background()
flowClient, err := client.New("127.0.0.1:3569", grpc.WithInsecure())
examples.Handle(err)
accountAddress := test.AddressGenerator().New()
accountKeyID := 0
accountKMSKey := cloudkms.Key{
ProjectID: "my-project",
LocationID: "global",
KeyRingID: "flow",
KeyID: "my-account",
KeyVersion: "1",
}
kmsClient, err := cloudkms.NewClient(ctx)
if err != nil {
panic(err)
}
accountKMSSigner, err := kmsClient.SignerForKey(
ctx,
accountAddress,
accountKMSKey,
)
if err != nil {
panic(err)
}
serviceAccount, err := flowClient.GetAccount(ctx, accountAddress)
if err != nil {
panic(err)
}
latestBlock, err := flowClient.GetLatestBlockHeader(ctx, true)
if err != nil {
panic(err)
}
accountKey := serviceAccount.Keys[accountKeyID]
tx := flow.NewTransaction().
SetScript(test.GreetingScript).
SetReferenceBlockID(latestBlock.ID).
SetProposalKey(accountAddress, accountKey.Index, accountKey.SequenceNumber).
SetPayer(accountAddress)
err = tx.AddArgument(cadence.NewString(test.GreetingGenerator().Random()))
examples.Handle(err)
err = tx.SignEnvelope(accountAddress, accountKey.Index, accountKMSSigner)
examples.Handle(err)
err = flowClient.SendTransaction(ctx, *tx)
examples.Handle(err)
examples.WaitForSeal(ctx, flowClient, tx.ID())
fmt.Println("Transaction complete!")
}