forked from onflow/flow-go-sdk
/
main.go
140 lines (116 loc) · 3.76 KB
/
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/Electronic-Signatures-Industries/flow-go-sdk/templates"
"google.golang.org/grpc"
"github.com/Electronic-Signatures-Industries/flow-go-sdk"
"github.com/Electronic-Signatures-Industries/flow-go-sdk/client"
"github.com/Electronic-Signatures-Industries/flow-go-sdk/examples"
)
func main() {
QueryEventsDemo()
}
func QueryEventsDemo() {
ctx := context.Background()
flowClient, err := client.New("127.0.0.1:3569", grpc.WithInsecure())
examples.Handle(err)
acctAddr, acctKey, acctSigner := examples.RandomAccount(flowClient)
// Deploy a contract with an event defined
contract := `
pub contract EventDemo {
pub event Add(x: Int, y: Int, sum: Int)
pub fun add(x: Int, y: Int) {
let sum = x + y
emit Add(x: x, y: y, sum: sum)
}
}
`
contractAccount := examples.CreateAccountWithContracts(flowClient,
nil, []templates.Contract{{
Name: "EventDemo",
Source: contract,
}})
// Send a tx that emits the event in the deployed contract
script := fmt.Sprintf(`
import EventDemo from 0x%s
transaction {
execute {
EventDemo.add(x: 2, y: 3)
}
}
`, contractAccount.Address.Hex())
referenceBlockID := examples.GetReferenceBlockId(flowClient)
runScriptTx := flow.NewTransaction().
SetScript([]byte(script)).
SetPayer(acctAddr).
SetReferenceBlockID(referenceBlockID).
SetProposalKey(acctAddr, acctKey.Index, acctKey.SequenceNumber)
err = runScriptTx.SignEnvelope(acctAddr, acctKey.Index, acctSigner)
examples.Handle(err)
err = flowClient.SendTransaction(ctx, *runScriptTx)
examples.Handle(err)
examples.WaitForSeal(ctx, flowClient, runScriptTx.ID())
// 1
// Query for account creation events by type
results, err := flowClient.GetEventsForHeightRange(ctx, client.EventRangeQuery{
Type: "flow.AccountCreated",
StartHeight: 0,
EndHeight: 100,
})
examples.Handle(err)
fmt.Println("\nQuery for AccountCreated event:")
for _, block := range results {
for i, event := range block.Events {
fmt.Printf("Found event #%d in block #%d\n", i+1, block.Height)
fmt.Printf("Transaction ID: %s\n", event.TransactionID)
fmt.Printf("Event ID: %s\n", event.ID())
fmt.Println(event.String())
}
}
// 2
// Query for our custom event by type
results, err = flowClient.GetEventsForHeightRange(ctx, client.EventRangeQuery{
Type: fmt.Sprintf("AC.%s.EventDemo.EventDemo.Add", contractAccount.Address.Hex()),
StartHeight: 0,
EndHeight: 100,
})
examples.Handle(err)
fmt.Println("\nQuery for Add event:")
for _, block := range results {
for i, event := range block.Events {
fmt.Printf("Found event #%d in block #%d\n", i+1, block.Height)
fmt.Printf("Transaction ID: %s\n", event.TransactionID)
fmt.Printf("Event ID: %s\n", event.ID())
fmt.Println(event.String())
}
}
// 3
// Query by transaction
result, err := flowClient.GetTransactionResult(ctx, runScriptTx.ID())
examples.Handle(err)
fmt.Println("\nQuery for tx by hash:")
for i, event := range result.Events {
fmt.Printf("Found event #%d\n", i+1)
fmt.Printf("Transaction ID: %s\n", event.TransactionID)
fmt.Printf("Event ID: %s\n", event.ID())
fmt.Println(event.String())
}
}