fix(gateway api): provide more informative error and logs on GQL errors being returned PE-6152

Author: fedellen

src/types/gql_Types.ts

@@ -79,5 +79,13 @@ export interface GQLTransactionsResultInterface {
 export default interface GQLResultInterface {
 	data: {
 		transactions: GQLTransactionsResultInterface;
-	};
+	} | null;
+	errors:
+		| {
+				message: string;
+				path: string[];
+				locations: { line: number; column: number }[];
+				extensions: { code: string };
+		  }[]
+		| undefined;
 }

src/utils/gateway_api.ts

@@ -82,6 +82,16 @@ export class GatewayAPI {
 		try {
 			const { data } = await this.postToEndpoint<GQLResultInterface>('graphql', query);
 
+			if (data.errors) {
+				data.errors.forEach((error) => {
+					console.error(`GQL Error: ${error.message}`);
+				});
+			}
+
+			if (!data.data) {
+				throw new Error('No data was returned from the GQL request.');
+			}
+
 			return data.data.transactions;
 		} catch (error) {
 			throw Error(`GQL Error: ${(error as Error).message}`);

tests/integration/arlocal.int.test.ts

@@ -885,7 +885,7 @@ describe('ArLocal Integration Tests', function () {
 						await arweave.api.post('graphql', buildQuery({ tags: [], owner }))
 					).data;
 
-					const txNode = gqlResp.data.transactions.edges[0].node;
+					const txNode = gqlResp.data!.transactions.edges[0].node;
 					return TxID(txNode.id);
 				}