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main.go
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main.go
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// Copyright (C) 2019-2023, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package main
import (
"context"
"fmt"
"log"
"time"
"github.com/ava-labs/avalanchego/indexer"
"github.com/ava-labs/avalanchego/vms/platformvm/blocks"
"github.com/ava-labs/avalanchego/vms/proposervm/block"
"github.com/ava-labs/avalanchego/wallet/subnet/primary"
)
// This example program continuously polls for the next P-Chain block
// and prints the ID of the block and its transactions.
func main() {
var (
uri = fmt.Sprintf("%s/ext/index/P/block", primary.LocalAPIURI)
client = indexer.NewClient(uri)
ctx = context.Background()
nextIndex uint64
)
for {
container, err := client.GetContainerByIndex(ctx, nextIndex)
if err != nil {
time.Sleep(time.Second)
log.Printf("polling for next accepted block\n")
continue
}
platformvmBlockBytes := container.Bytes
proposerVMBlock, err := block.Parse(container.Bytes)
if err == nil {
platformvmBlockBytes = proposerVMBlock.Block()
}
platformvmBlock, err := blocks.Parse(blocks.Codec, platformvmBlockBytes)
if err != nil {
log.Fatalf("failed to parse platformvm block: %s\n", err)
}
acceptedTxs := platformvmBlock.Txs()
log.Printf("accepted block %s with %d transactions\n", platformvmBlock.ID(), len(acceptedTxs))
for _, tx := range acceptedTxs {
log.Printf("accepted transaction %s\n", tx.ID())
}
nextIndex++
}
}