/
ethclient.go
142 lines (118 loc) · 3.82 KB
/
ethclient.go
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package main
import (
"context"
"fmt"
"log"
"math/big"
"time"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
gosdk "github.com/metaofo/fbchain-sdk"
)
const (
host string = "https://node.fibochain.org"
alice string = "0xaD37A476c7D3b8F382C5DfC5E789e6540ea246bb"
bob string = "0x0073F2E28ef8F117e53d858094086Defaf1837D5"
aliceKey string = "5a72d444804664c3cf38fffc6117e6142146ddac25abaa35b72eb86dfe6ae56c"
)
//ws ws://8.210.109.185:8546
//{"id": 1, "method": "eth_subscribe", "params": ["newHeads", {"includeTransactions": true}]}
//{"id": 1, "method": "eth_subscribe", "params": ["newPendingTransactions"]}
func main() {
client, err := gosdk.NewEthClient(context.Background(), host)
if err != nil {
fmt.Println(err)
}
gasPrice, err := client.SuggestGasPrice(context.Background())
if err != nil {
log.Fatal(err)
}
fmt.Println("gasPrice", gasPrice)
blockNumber, err := client.BlockNumber(context.Background())
if err != nil {
log.Fatal(err)
}
fmt.Println("blockNumber:", blockNumber)
balance, err := client.BalanceAt(context.Background(), common.HexToAddress(alice), big.NewInt(int64(blockNumber)))
if err != nil {
log.Fatal(err)
}
fmt.Println("balance:", balance)
nonce, err := client.NonceAt(context.Background(), common.HexToAddress(alice), big.NewInt(int64(blockNumber)))
if err != nil {
log.Fatal(err)
}
fmt.Println("nonce", nonce)
pendingNonce, err := client.PendingNonceAt(context.Background(), common.HexToAddress(alice))
if err != nil {
log.Fatal(err)
}
fmt.Println("pendingNonce", pendingNonce)
chainID, err := client.ChainID(context.Background())
if err != nil {
log.Fatal(err)
}
fmt.Println("chainID", chainID)
privateKey, _ := crypto.HexToECDSA(aliceKey)
unsignedTx := types.NewTransaction(pendingNonce, common.HexToAddress(bob), big.NewInt(1000000000000000000), 30000, gasPrice, []byte{})
signedTx, _ := types.SignTx(unsignedTx, types.NewEIP155Signer(chainID), privateKey)
err = client.SendTransaction(context.Background(), signedTx)
if err != nil {
log.Fatal(err)
}
time.Sleep(time.Second * 4)
fmt.Println("txHash", signedTx.Hash())
receipt, err := client.TransactionReceipt(context.Background(), signedTx.Hash())
if err != nil {
log.Fatal(err)
}
fmt.Printf("recipt %+v\n", receipt)
pendingCode, err := client.PendingCodeAt(context.Background(), common.HexToAddress(alice))
if err != nil {
log.Fatal(err)
}
fmt.Println("pendingCode", pendingCode)
code, err := client.CodeAt(context.Background(), common.HexToAddress(alice), big.NewInt(int64(blockNumber)))
if err != nil {
log.Fatal(err)
}
fmt.Println("code", code)
to := common.HexToAddress(bob)
msg := ethereum.CallMsg{From: common.HexToAddress(alice), To: &to, GasPrice: gasPrice, Value: big.NewInt(1), Data: []byte{}}
estimateGas, err := client.EstimateGas(context.Background(), msg)
if err != nil {
log.Fatal(err)
}
fmt.Println("estimateGas", estimateGas)
re, err := client.CallContract(context.Background(), msg, big.NewInt(int64(blockNumber)))
if err != nil {
log.Fatal(err)
}
fmt.Println("callContract", re)
block, err := client.BlockByNumber(context.Background(), nil)
if err != nil {
log.Fatal(err)
}
fmt.Println("block", block)
ss, err := client.SubscribeNewHead(context.Background(), make(chan *types.Header))
if err != nil {
fmt.Println(err)
} else {
fmt.Println("subscription", ss)
}
es, err := client.EthSubscribe(context.Background(), make(chan *types.Header), "newHeads")
if err != nil {
fmt.Println(err)
} else {
fmt.Println("ethSubscribe", es)
}
var hex hexutil.Big
err = client.CallContext(context.Background(), &hex, "eth_gasPrice")
if err != nil {
log.Fatal(err)
}
fmt.Println("CallContext", hex)
}