Use LiteSVM for JS client tests

Makefile

@@ -36,6 +36,4 @@ lint-js:
 	cd ./clients/js && pnpm install && pnpm lint
 
 test-js:
-	./scripts/restart-test-validator.sh
 	cd ./clients/js && pnpm install && pnpm build && pnpm test
-	./scripts/stop-test-validator.sh

README.md

@@ -29,17 +29,3 @@ The following clients are available for the System program. You may use the foll
 
 - [JS client](./clients/js)
 - [Rust client](./clients/rust)
-
-## Starting and stopping the local validator
-
-The following script is available to start or restart your local validator.
-
-```sh
-./scripts/restart-test-validator.sh
-```
-
-Finally, you may stop the local validator using the following command.
-
-```sh
-./scripts/stop-test-validator.sh
-```

clients/js/package.json

@@ -48,7 +48,7 @@
     },
     "devDependencies": {
         "@solana/eslint-config-solana": "^6.0.0",
-        "@solana/kit-plugin-rpc": "^0.10.0",
+        "@solana/kit-plugin-litesvm": "^0.10.0",
         "@solana/kit-plugin-signer": "^0.10.0",
         "@solana/kit": "^6.4.0",
         "@types/node": "^24",

clients/js/test/_setup.ts

@@ -7,7 +7,7 @@ import {
     lamports,
     sequentialInstructionPlan,
 } from '@solana/kit';
-import { solanaLocalRpc } from '@solana/kit-plugin-rpc';
+import { litesvm } from '@solana/kit-plugin-litesvm';
 import { airdropSigner, generatedSigner } from '@solana/kit-plugin-signer';
 import {
     SYSTEM_PROGRAM_ADDRESS,
@@ -20,7 +20,7 @@ import {
 export const createTestClient = () => {
     return createClient()
         .use(generatedSigner())
-        .use(solanaLocalRpc())
+        .use(litesvm())
         .use(systemProgram())
         .use(airdropSigner(lamports(1_000_000_000n)));
 };

clients/js/test/advanceNonceAccount.test.ts

@@ -12,6 +12,12 @@ it('advances the nonce account', async () => {
     await client.sendTransaction(await getCreateNonceInstructionPlan(client, nonce, authority));
     const originalNonceAccount = await client.system.accounts.nonce.fetch(nonce.address);
 
+    // Expire the blockhash so the nonce's stored blockhash is no longer in the
+    // RecentBlockhashes sysvar. On a live cluster this happens naturally between
+    // blocks; under LiteSVM we have to trigger it explicitly, otherwise the
+    // System Program returns NonceBlockhashNotExpired (error 7).
+    client.svm.expireBlockhash();
+
     // When the authority advances the nonce account.
     await client.system.instructions
         .advanceNonceAccount({ nonceAccount: nonce.address, nonceAuthority: authority })