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added a new ethereum client in flow and connected to it
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| package blockchain | ||
|
|
||
| import ( | ||
| "crypto/ecdsa" | ||
| "fmt" | ||
| "os" | ||
|
|
||
| "github.com/ethereum/go-ethereum/crypto" | ||
| "github.com/ethereum/go-ethereum/ethclient" | ||
| "github.com/joho/godotenv" | ||
| ) | ||
|
|
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| type Client struct { | ||
| ethClient *ethclient.Client | ||
| privateKey *ecdsa.PrivateKey | ||
| } | ||
|
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| func NewClient() (*Client, error) { | ||
| // Load .env file | ||
| err := godotenv.Load() | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error loading .env file: %v", err) | ||
| } | ||
|
|
||
| // Connect to Ethereum client | ||
| alchemyURL := os.Getenv("ALCHEMY_API_URL") | ||
| if alchemyURL == "" { | ||
| return nil, fmt.Errorf("ALCHEMY_API_URL is not set in .env file") | ||
| } | ||
|
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| ethClient, err := ethclient.Dial(alchemyURL) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to connect to the Ethereum client: %v", err) | ||
| } | ||
|
|
||
| // Load private key | ||
| privateKeyHex := os.Getenv("PRIVATE_KEY") | ||
| privateKey, err := crypto.HexToECDSA(privateKeyHex) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("invalid private key: %v", err) | ||
| } | ||
|
|
||
| return &Client{ethClient: ethClient, privateKey: privateKey}, nil | ||
| } |
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