taprpc: update priceoraclerpc proto defs

Author: jtobin

taprpc/priceoraclerpc/price_oracle.pb.go

@@ -81,6 +81,16 @@ enum Intent {
     INTENT_RECV_PAYMENT_QUALIFY = 6;
 }
 
+// ErrorCode represents the possible error codes that can be returned in a
+// QueryAssetRatesErrResponse.
+enum ErrorCode {
+    // ERROR_UNSPECIFIED indicates an unspecified error.
+    ERROR_UNSPECIFIED = 0;
+
+    // UNSUPPORTED indicates the asset is not supported.
+    ERROR_UNSUPPORTED = 1;
+}
+
 // FixedPoint is a scaled integer representation of a fractional number.
 //
 // This type consists of two integer fields: a coefficient and a scale.
@@ -228,7 +238,7 @@ message QueryAssetRatesErrResponse {
     string message = 1;
 
     // code is the error code.
-    uint32 code = 2;
+    ErrorCode code = 2;
 }
 
 // QueryAssetRatesResponse is the response from a QueryAssetRates RPC call.

taprpc/priceoraclerpc/price_oracle.proto

@@ -244,6 +244,15 @@
       },
       "description": "AssetSpecifier is a union type for specifying an asset by either its asset ID\nor group key."
     },
+    "priceoraclerpcErrorCode": {
+      "type": "string",
+      "enum": [
+        "ERROR_UNSPECIFIED",
+        "ERROR_UNSUPPORTED"
+      ],
+      "default": "ERROR_UNSPECIFIED",
+      "description": "ErrorCode represents the possible error codes that can be returned in a\nQueryAssetRatesErrResponse.\n\n - ERROR_UNSPECIFIED: ERROR_UNSPECIFIED indicates an unspecified error.\n - ERROR_UNSUPPORTED: UNSUPPORTED indicates the asset is not supported."
+    },
     "priceoraclerpcFixedPoint": {
       "type": "object",
       "properties": {
@@ -281,8 +290,7 @@
           "description": "error is the error message."
         },
         "code": {
-          "type": "integer",
-          "format": "int64",
+          "$ref": "#/definitions/priceoraclerpcErrorCode",
           "description": "code is the error code."
         }
       },