chore(SPV-846): add more errors and refactor methods

authentication.go

@@ -17,7 +17,7 @@ import (
 )
 
 // SetSignature will set the signature on the header for the request
-func setSignature(header *http.Header, xPriv *bip32.ExtendedKey, bodyString string) *models.SPVError {
+func setSignature(header *http.Header, xPriv *bip32.ExtendedKey, bodyString string) error {
 	// Create the signature
 	authData, err := createSignature(xPriv, bodyString)
 	if err != nil {
@@ -135,7 +135,7 @@ func getUnlockingScript(tx *bt.Tx, inputIndex uint32, privateKey *bec.PrivateKey
 func createSignature(xPriv *bip32.ExtendedKey, bodyString string) (payload *models.AuthPayload, err error) {
 	// No key?
 	if xPriv == nil {
-		err = CreateErrorResponse("error-unauthorized-missing-xpriv", "missing xpriv")
+		err = ErrMissingXpriv
 		return
 	}
 

errors.go

@@ -2,16 +2,18 @@ package walletclient
 
 import (
 	"encoding/json"
-	"errors"
 	"github.com/bitcoin-sv/spv-wallet/models"
 	"net/http"
 )
 
 // ErrAdminKey admin key not set
-var ErrAdminKey = errors.New("an admin key must be set to be able to create an xpub")
+var ErrAdminKey = models.SPVError{Message: "an admin key must be set to be able to create an xpub", StatusCode: 401, Code: "error-unauthorized-admin-key-not-set"}
 
-// ErrNoClientSet is when no client is set
-var ErrNoClientSet = errors.New("no transport client set")
+// ErrMissingXpriv is when xpriv is missing
+var ErrMissingXpriv = models.SPVError{Message: "xpriv missing", StatusCode: 401, Code: "error-unauthorized-xpriv-missing"}
+
+// ErrCouldNotFindDraftTransaction is when draft transaction is not found
+var ErrCouldNotFindDraftTransaction = models.SPVError{Message: "could not find draft transaction", StatusCode: 404, Code: "error-draft-transaction-not-found"}
 
 // WrapError wraps an error into SPVError
 func WrapError(err error) *models.SPVError {