From 62e1acefc4e5f858545ac43443b18373cd3fa91b Mon Sep 17 00:00:00 2001
From: Christophe Deveaux <contact@christophedeveaux.com>
Date: Mon, 24 Jun 2024 18:12:41 +0200
Subject: [PATCH] feat: add isAnyTrust (#130)

---
 src/index.ts                |  3 +++
 src/isAnyTrust.ts           | 29 +++++++++++++++++++++++++++++
 src/isAnyTrust.unit.test.ts | 30 ++++++++++++++++++++++++++++++
 3 files changed, 62 insertions(+)
 create mode 100644 src/isAnyTrust.ts
 create mode 100644 src/isAnyTrust.unit.test.ts

diff --git a/src/index.ts b/src/index.ts
index e53666c0..a23840f4 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -106,6 +106,7 @@ import {
   GetBatchPostersParams,
   GetBatchPostersReturnType,
 } from './getBatchPosters';
+import { isAnyTrust } from './isAnyTrust';
 
 export {
   arbOwnerPublicActions,
@@ -195,4 +196,6 @@ export {
   getBatchPosters,
   GetBatchPostersParams,
   GetBatchPostersReturnType,
+  //
+  isAnyTrust,
 };
diff --git a/src/isAnyTrust.ts b/src/isAnyTrust.ts
new file mode 100644
index 00000000..24947371
--- /dev/null
+++ b/src/isAnyTrust.ts
@@ -0,0 +1,29 @@
+import { Address, Chain, PublicClient, Transport, decodeFunctionData, getAbiItem } from 'viem';
+import { createRollupFetchTransactionHash } from './createRollupFetchTransactionHash';
+import { rollupCreator } from './contracts';
+
+const createRollupABI = getAbiItem({ abi: rollupCreator.abi, name: 'createRollup' });
+export async function isAnyTrust<TChain extends Chain | undefined>({
+  rollup,
+  publicClient,
+}: {
+  rollup: Address;
+  publicClient: PublicClient<Transport, TChain>;
+}) {
+  const createRollupTransactionHash = await createRollupFetchTransactionHash({
+    rollup,
+    publicClient,
+  });
+
+  const transaction = await publicClient.getTransaction({
+    hash: createRollupTransactionHash,
+  });
+  const {
+    args: [{ config }],
+  } = decodeFunctionData({
+    abi: [createRollupABI],
+    data: transaction.input,
+  });
+  const chainConfig = JSON.parse(config.chainConfig);
+  return chainConfig.arbitrum.DataAvailabilityCommittee;
+}
diff --git a/src/isAnyTrust.unit.test.ts b/src/isAnyTrust.unit.test.ts
new file mode 100644
index 00000000..3ff89023
--- /dev/null
+++ b/src/isAnyTrust.unit.test.ts
@@ -0,0 +1,30 @@
+import { expect, it } from 'vitest';
+import { isAnyTrust } from './isAnyTrust';
+import { createPublicClient, http } from 'viem';
+import { arbitrumNova, arbitrumSepolia, sepolia } from 'viem/chains';
+
+it('should return true for AnyTrust chain', async () => {
+  const client = createPublicClient({
+    chain: arbitrumNova,
+    transport: http(),
+  });
+  // https://nova.arbiscan.io/tx/0x37be7a29db10d18501dcf4d0243fa6aefeeba21cbc17832ef16ccf288ce58ef2
+  const isPlaynanceAnyTrust = await isAnyTrust({
+    publicClient: client,
+    rollup: '0x04ea347cC6A258A7F65D67aFb60B1d487062A1d0',
+  });
+  expect(isPlaynanceAnyTrust).toBeTruthy();
+});
+
+it('should return false for non AnyTrust chain', async () => {
+  const client = createPublicClient({
+    chain: arbitrumSepolia,
+    transport: http(),
+  });
+  // https://sepolia.arbiscan.io/tx/0x0bbb740d8b0286654b3d0f63175ec882dcbb7714cbf5207357a4a72a4d2dc640
+  const isAnyTrustChain = await isAnyTrust({
+    publicClient: client,
+    rollup: '0xd0c7b5c4e8f72e0750ed9dc70a10cf6f5afd4787',
+  });
+  expect(isAnyTrustChain).toBeFalsy();
+});