diff --git a/.env-sample b/.env-sample
index 8d1824c2..233224a4 100644
--- a/.env-sample
+++ b/.env-sample
@@ -3,6 +3,12 @@ CONFIG_NETWORK_NAME="custom"
 DEPLOYED_CONTRACTS_DIR="./scripts/files/"
 DISABLE_VERIFICATION=true
 
+# yarn script:bold-populate-lookup looks for the latest confirmed node's creation event
+# these 2 parameters configure log lookup behavior. the script searches backwards in batches
+# if the script throws "Could not find latest confirmed node", consider tweaking these values
+NODECREATED_LOG_LOOKUP_BATCH_SIZE=10000
+NODECREATED_LOG_LOOKUP_BATCH_COUNT=100
+
 # to use the 'custom' hardhat network, set the following variables
 CUSTOM_RPC_URL="http://127.0.0.1:8545"
 CUSTOM_ETHERSCAN_API_KEY=
diff --git a/scripts/boldUpgradeFunctions.ts b/scripts/boldUpgradeFunctions.ts
index 5334c40e..765dd06a 100644
--- a/scripts/boldUpgradeFunctions.ts
+++ b/scripts/boldUpgradeFunctions.ts
@@ -86,10 +86,14 @@ export const populateLookup = async (
   const latestConfirmed = await oldRollup.latestConfirmed()
   let latestConfirmedLog
   let toBlock = await wallet.provider!.getBlockNumber()
-  for (let i = 0; i < 100; i++) {
+  const numBatches = parseInt(process.env.NODECREATED_LOG_LOOKUP_BATCH_COUNT || '100')
+  const batchSize = parseInt(
+    process.env.NODECREATED_LOG_LOOKUP_BATCH_SIZE || '10000'
+  )
+  for (let i = 0; i < numBatches; i++) {
     latestConfirmedLog = await wallet.provider!.getLogs({
       address: rollupAddr,
-      fromBlock: toBlock >= 1000 ? toBlock - 1000 : 0,
+      fromBlock: toBlock >= batchSize ? toBlock - batchSize : 0,
       toBlock: toBlock,
       topics: [
         oldRollup.interface.getEventTopic('NodeCreated'),
@@ -100,7 +104,7 @@ export const populateLookup = async (
     if (toBlock == 0) {
       throw new Error('Could not find latest confirmed node')
     }
-    toBlock -= 1000
+    toBlock -= batchSize
     if (toBlock < 0) {
       toBlock = 0
     }