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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| A golang based library to use the obscuro gateway programmatically. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| package lib | ||
|
|
||
| import ( | ||
| "context" | ||
| "crypto/ecdsa" | ||
| "encoding/hex" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "strings" | ||
|
|
||
| gethcommon "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/crypto" | ||
| "github.com/obscuronet/go-obscuro/tools/walletextension/common" | ||
| "github.com/valyala/fasthttp" | ||
| ) | ||
|
|
||
| type OGLib struct { | ||
| httpURL string | ||
| wsURL string | ||
| userID []byte | ||
| } | ||
|
|
||
| func NewObscuroGatewayLibrary(httpURL, wsURL string) *OGLib { | ||
| return &OGLib{ | ||
| httpURL: httpURL, | ||
| wsURL: wsURL, | ||
| } | ||
| } | ||
|
|
||
| func (o *OGLib) UserID() string { | ||
| return string(o.userID) | ||
| } | ||
|
|
||
| func (o *OGLib) Join() error { | ||
| // todo move this to stdlib | ||
| statusCode, userID, err := fasthttp.Get(nil, fmt.Sprintf("%s/v1/join/", o.httpURL)) | ||
| if err != nil || statusCode != 200 { | ||
| return fmt.Errorf(fmt.Sprintf("Failed to get userID. Status code: %d, err: %s", statusCode, err)) | ||
| } | ||
| o.userID = userID | ||
| return nil | ||
| } | ||
|
|
||
| func (o *OGLib) RegisterAccount(pk *ecdsa.PrivateKey, addr gethcommon.Address) error { | ||
| // create the registration message | ||
| message := fmt.Sprintf("Register %s for %s", o.userID, strings.ToLower(addr.Hex())) | ||
| prefixedMessage := fmt.Sprintf(common.PersonalSignMessagePrefix, len(message), message) | ||
|
|
||
| messageHash := crypto.Keccak256([]byte(prefixedMessage)) | ||
| sig, err := crypto.Sign(messageHash, pk) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to sign message: %w", err) | ||
| } | ||
| sig[64] += 27 | ||
| signature := "0x" + hex.EncodeToString(sig) | ||
| payload := fmt.Sprintf("{\"signature\": \"%s\", \"message\": \"%s\"}", signature, message) | ||
|
|
||
| // issue the registration message | ||
| req, err := http.NewRequestWithContext( | ||
| context.Background(), | ||
| http.MethodPost, | ||
| o.httpURL+"/v1/authenticate/?u="+string(o.userID), | ||
| strings.NewReader(payload), | ||
| ) | ||
| if err != nil { | ||
| return fmt.Errorf("unable to create request - %w", err) | ||
| } | ||
|
|
||
| req.Header.Set("Content-Type", "application/json; charset=UTF-8") | ||
|
|
||
| client := &http.Client{} | ||
| response, err := client.Do(req) | ||
| if err != nil { | ||
| return fmt.Errorf("unable to issue request - %w", err) | ||
| } | ||
|
|
||
| defer response.Body.Close() | ||
| _, err = io.ReadAll(response.Body) | ||
| if err != nil { | ||
| return fmt.Errorf("unable to read response - %w", err) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (o *OGLib) HTTP() string { | ||
| return fmt.Sprintf("%s/v1/?u=%s", o.httpURL, o.userID) | ||
| } | ||
|
|
||
| func (o *OGLib) WS() string { | ||
| return fmt.Sprintf("%s/v1/?u=%s", o.wsURL, o.userID) | ||
| } |