74 lines
1.9 KiB
Go
74 lines
1.9 KiB
Go
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package ethclient
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import (
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"context"
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"crypto/ecdsa"
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/sirupsen/logrus"
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)
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// // Balance returns the balance of the given ethereum address.
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func (c *EthereumClient) Balance(ctx context.Context, address string) (*big.Int, error) {
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ethereumAddress := common.HexToAddress(address)
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value, err := c.client.BalanceAt(ctx, ethereumAddress, nil)
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if err != nil {
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return nil, err
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}
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return value, nil
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}
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func (c *EthereumClient) SendTransaction(ctx context.Context, private_key, to string, amount int64) string {
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privateKey, err := crypto.HexToECDSA(private_key)
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if err != nil {
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logrus.Fatal("Failed to parse private key", err)
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}
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publicKey := privateKey.Public()
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publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey)
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if !ok {
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logrus.Fatal("Cannot assert type: publicKey is not of type *ecdsa.PublicKey", err)
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}
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fromAddress := crypto.PubkeyToAddress(*publicKeyECDSA)
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nonce, err := c.client.PendingNonceAt(ctx, fromAddress)
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if err != nil {
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logrus.Fatal("Failed to generate wallet nonce value", err)
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}
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value := big.NewInt(amount)
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gasLimit := uint64(21000) // in units
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gasPrice, err := c.client.SuggestGasPrice(ctx)
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if err != nil {
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logrus.Fatal("Failed to suggest new gas price", err)
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}
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toAddress := common.HexToAddress(to)
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var data []byte
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tx := types.NewTransaction(nonce, toAddress, value, gasLimit, gasPrice, data)
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chainID, err := c.client.NetworkID(ctx)
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if err != nil {
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logrus.Fatal("Failed to get network ID", err)
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}
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signedTx, err := types.SignTx(tx, types.NewEIP155Signer(chainID), privateKey)
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if err != nil {
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logrus.Fatal("Failed to sign transaction", err)
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}
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err = c.client.SendTransaction(ctx, signedTx)
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if err != nil {
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logrus.Fatal("Failed to send signed transaction", err)
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}
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TxHash := signedTx.Hash().Hex()
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logrus.Info("Transaction sent: %s", TxHash)
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return TxHash
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}
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