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feat: allow configurable headers on execution node
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| package api | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "time" | ||
|
|
||
| "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| // ExecutionClient is an interface for executing RPC calls to the Ethereum node. | ||
| type ExecutionClient interface { | ||
| // ETHCall executes a new message call immediately without creating a transaction on the block chain. | ||
| ETHCall(transaction *ETHCallTransaction, block string) (string, error) | ||
| // ETHGetBalance returns the balance of the account of given address. | ||
| ETHGetBalance(address string, block string) (string, error) | ||
| } | ||
|
|
||
| type ETHCallTransaction struct { | ||
| From *string `json:"from"` | ||
| To string `json:"to"` | ||
| Gas *string `json:"gas"` | ||
| GasPrice *string `json:"gasPrice"` | ||
| Value *string `json:"value"` | ||
| Data *string `json:"data"` | ||
| } | ||
|
|
||
| type executionClient struct { | ||
| url string | ||
| log logrus.FieldLogger | ||
| client http.Client | ||
| headers map[string]string | ||
| } | ||
|
|
||
| // NewExecutionClient creates a new ExecutionClient. | ||
| func NewExecutionClient(log logrus.FieldLogger, url string, headers map[string]string, timeout time.Duration) ExecutionClient { | ||
| client := http.Client{ | ||
| Timeout: timeout, | ||
| } | ||
|
|
||
| return &executionClient{ | ||
| url: url, | ||
| log: log, | ||
| client: client, | ||
| headers: headers, | ||
| } | ||
| } | ||
|
|
||
| type apiResponse struct { | ||
| JSONRpc string `json:"jsonrpc"` | ||
| ID int64 `json:"id"` | ||
| Result json.RawMessage `json:"result"` | ||
| } | ||
|
|
||
| //nolint:unparam // ctx will probably be used in the future | ||
| func (e *executionClient) post(method string, params interface{}, id int) (json.RawMessage, error) { | ||
| body := map[string]interface{}{ | ||
| "jsonrpc": "2.0", | ||
| "method": method, | ||
| "id": id, | ||
| "params": params, | ||
| } | ||
|
|
||
| jsonData, err := json.Marshal(body) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| req, err := http.NewRequest("POST", e.url, bytes.NewBuffer(jsonData)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| for k, v := range e.headers { | ||
| req.Header.Set(k, v) | ||
| } | ||
|
|
||
| req.Header.Set("Content-Type", "application/json") | ||
|
|
||
| rsp, err := e.client.Do(req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| defer rsp.Body.Close() | ||
|
|
||
| if rsp.StatusCode != http.StatusOK { | ||
| return nil, fmt.Errorf("status code: %d", rsp.StatusCode) | ||
| } | ||
|
|
||
| data, err := io.ReadAll(rsp.Body) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| resp := new(apiResponse) | ||
| if err := json.Unmarshal(data, resp); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return resp.Result, nil | ||
| } | ||
|
|
||
| func (e *executionClient) ETHCall(transaction *ETHCallTransaction, block string) (string, error) { | ||
| params := []interface{}{ | ||
| transaction, | ||
| block, | ||
| } | ||
|
|
||
| rsp, err := e.post("eth_call", params, 1) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| ethCall := "" | ||
| if err := json.Unmarshal(rsp, ðCall); err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| return ethCall, nil | ||
| } | ||
|
|
||
| func (e *executionClient) ETHGetBalance(address, block string) (string, error) { | ||
| params := []interface{}{ | ||
| address, | ||
| block, | ||
| } | ||
|
|
||
| rsp, err := e.post("eth_getBalance", params, 1) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| ethGetBalance := "" | ||
| if err := json.Unmarshal(rsp, ðGetBalance); err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| return ethGetBalance, nil | ||
| } |
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