add mutations to exchange painel

app/javascript/src/pages/Orders/Exchange/ExchangePanel/createBuyCryptoOrder.tsx

@@ -0,0 +1,37 @@
+import { graphql } from "babel-plugin-relay/macro";
+import type { Environment } from "react-relay";
+import { commitMutation } from "react-relay";
+
+import type { createBuyCryptoOrderMutationVariables } from "./__generated__/createBuyCryptoOrderMutation.graphql";
+
+export const commitCreateBuyCryptoOrderMutation = (
+  environment: Environment,
+  variables: createBuyCryptoOrderMutationVariables
+) => {
+  return commitMutation(environment, {
+    mutation: graphql`
+      mutation createBuyCryptoOrderMutation(
+        $currencyId: ID!
+        $amountCents: Int!
+      ) {
+        createBuyCryptoOrder(
+          input: {
+            order: { currencyId: $currencyId, amountCents: $amountCents }
+          }
+        ) {
+          errors {
+            messages
+          }
+          order {
+            id
+          }
+        }
+      }
+    `,
+    variables: { ...variables },
+    onCompleted: (_response) => {
+      window.location.reload();
+    },
+    onError: (_error) => {},
+  });
+};