From b5baa886e6820336a9550bbaa7b6f476da4782ae Mon Sep 17 00:00:00 2001
From: ryanycw <ryan@ryanycw.dev>
Date: Wed, 25 Oct 2023 21:56:09 +0800
Subject: [PATCH 1/2] build: export block during deploy

---
 packages/contracts/scripts/deploy.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/contracts/scripts/deploy.ts b/packages/contracts/scripts/deploy.ts
index b50b361ec..1552cc380 100644
--- a/packages/contracts/scripts/deploy.ts
+++ b/packages/contracts/scripts/deploy.ts
@@ -33,6 +33,10 @@ export async function main() {
             : `/**
               This contract was deployed using a mnemonic. The PRIVATE_KEY variable needs to be set manually
               **/`
+
+        // get forked block number
+        const blockNum = await ethers.provider.getBlockNumber()
+        config.GENESIS_BLOCK = (blockNum - 999).toString()
         await fs.promises.writeFile(configPath, envfile.stringify(config))
     })
 

From 1c6aa22fa6ef9956dbb87976a936b782d6b31dfd Mon Sep 17 00:00:00 2001
From: ryanycw <ryan@ryanycw.dev>
Date: Wed, 25 Oct 2023 21:56:29 +0800
Subject: [PATCH 2/2] build: add genesis block from configs

---
 packages/relay/src/config.ts | 10 ++++++++--
 packages/relay/src/index.ts  |  5 ++---
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/packages/relay/src/config.ts b/packages/relay/src/config.ts
index a9eead0d8..5ef100cc5 100644
--- a/packages/relay/src/config.ts
+++ b/packages/relay/src/config.ts
@@ -17,11 +17,17 @@ Object.assign(process.env, {
     PRIVATE_KEY:
         process.env.PRIVATE_KEY ??
         '0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80',
+    GENESIS_BLOCK: process.env.GENESIS_BLOCK ?? '0',
     ...process.env,
 })
 
-export const { UNIREP_ADDRESS, APP_ADDRESS, ETH_PROVIDER_URL, PRIVATE_KEY } =
-    process.env as any
+export const {
+    UNIREP_ADDRESS,
+    APP_ADDRESS,
+    ETH_PROVIDER_URL,
+    PRIVATE_KEY,
+    GENESIS_BLOCK,
+} = process.env as any
 
 export const APP_ABI = ABI
 
diff --git a/packages/relay/src/index.ts b/packages/relay/src/index.ts
index fe90614d5..bf5deb3b2 100644
--- a/packages/relay/src/index.ts
+++ b/packages/relay/src/index.ts
@@ -17,6 +17,7 @@ import {
     DB_PATH,
     APP_ADDRESS,
     APP_ABI,
+    GENESIS_BLOCK,
 } from './config'
 import TransactionManager from './singletons/TransactionManager'
 
@@ -27,8 +28,6 @@ main().catch((err) => {
 
 async function main() {
     const db = await SQLiteConnector.create(schema, DB_PATH ?? ':memory:')
-    // TODO: this should be switched by stage and prod
-    const blockNum = await provider.send('eth_blockNumber', [])
 
     const synchronizer = new UnirepSocialSynchronizer(
         {
@@ -37,7 +36,7 @@ async function main() {
             prover: prover,
             provider: provider,
             unirepAddress: UNIREP_ADDRESS,
-            genesisBlock: parseInt(blockNum) - 999,
+            genesisBlock: parseInt(GENESIS_BLOCK),
         },
         new ethers.Contract(APP_ADDRESS, APP_ABI, provider)
     )