From 75792595b91aa494bba396e94a5e63ea2bdccfa6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nedim=20Salki=C4=87?= <nedim.salkic@fuel.sh>
Date: Thu, 11 Jul 2024 22:06:10 +0200
Subject: [PATCH] fix: `launchTestNode` multiple contracts type inference
 (#2756)

---
 .changeset/soft-cycles-do.md                  |  5 ++++
 .../src/test-utils/launch-test-node.ts        |  2 +-
 .../src/launch-test-node-types.test.ts        | 29 +++++++++++++++++++
 3 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/soft-cycles-do.md
 create mode 100644 packages/fuel-gauge/src/launch-test-node-types.test.ts

diff --git a/.changeset/soft-cycles-do.md b/.changeset/soft-cycles-do.md
new file mode 100644
index 0000000000..06aae67c1a
--- /dev/null
+++ b/.changeset/soft-cycles-do.md
@@ -0,0 +1,5 @@
+---
+"@fuel-ts/contract": patch
+---
+
+fix: `launchTestNode` multiple contracts type inference
diff --git a/packages/contract/src/test-utils/launch-test-node.ts b/packages/contract/src/test-utils/launch-test-node.ts
index b35f833190..1987632aa2 100644
--- a/packages/contract/src/test-utils/launch-test-node.ts
+++ b/packages/contract/src/test-utils/launch-test-node.ts
@@ -130,7 +130,7 @@ function getWalletForDeployment(config: DeployContractConfig, wallets: WalletUnl
   return wallets[config.walletIndex];
 }
 
-export async function launchTestNode<TFactories extends DeployContractConfig[]>({
+export async function launchTestNode<const TFactories extends DeployContractConfig[]>({
   providerOptions = {},
   walletsConfig = {},
   nodeOptions = {},
diff --git a/packages/fuel-gauge/src/launch-test-node-types.test.ts b/packages/fuel-gauge/src/launch-test-node-types.test.ts
new file mode 100644
index 0000000000..a72aa4e74d
--- /dev/null
+++ b/packages/fuel-gauge/src/launch-test-node-types.test.ts
@@ -0,0 +1,29 @@
+import { launchTestNode } from 'fuels/test-utils';
+
+import type { AdvancedLoggingAbi, CallTestContractAbi } from '../test/typegen';
+import { AdvancedLoggingAbi__factory, CallTestContractAbi__factory } from '../test/typegen';
+import AdvancedLoggingBytecode from '../test/typegen/contracts/AdvancedLoggingAbi.hex';
+import CallTestContractBytecode from '../test/typegen/contracts/CallTestContractAbi.hex';
+
+/**
+ * @group node
+ * @group browser
+ */
+describe('type level tests for launchTestNode', () => {
+  test('infers types correctly', async () => {
+    using launched = await launchTestNode({
+      contractsConfigs: [
+        { deployer: AdvancedLoggingAbi__factory, bytecode: AdvancedLoggingBytecode },
+        { deployer: CallTestContractAbi__factory, bytecode: CallTestContractBytecode },
+        { deployer: AdvancedLoggingAbi__factory, bytecode: AdvancedLoggingBytecode },
+      ],
+    });
+    const {
+      contracts: [c1, c2, c3],
+    } = launched;
+
+    expectTypeOf(c1).toMatchTypeOf<AdvancedLoggingAbi>();
+    expectTypeOf(c2).toMatchTypeOf<CallTestContractAbi>();
+    expectTypeOf(c3).toMatchTypeOf<AdvancedLoggingAbi>();
+  });
+});