diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f5df625..5d0f5da 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -42,6 +42,14 @@ jobs:
           else
             echo "stellar-scaffold already installed. Clear cache to force reinstall."
           fi
+      - name: Start Stellar local network
+        uses: stellar/quickstart@main
+        with:
+          enable: "core,rpc"
+      - name: Add master account as default identity
+        run: |
+          mkdir -p .config/stellar/identity
+          echo 'secret_key = "SC5O7VZUXDJ6JBDSZ74DSERXL7W3Y5LTOAMRF7RQRL3TAGAPS7LUVG3L"' > .config/stellar/identity/me.toml
       - run: npm ci
       - run: npm run lint
       - run: npx prettier . --check
diff --git a/src/components/GuessTheNumber.tsx b/src/components/GuessTheNumber.tsx
index 7b24a68..905ff88 100644
--- a/src/components/GuessTheNumber.tsx
+++ b/src/components/GuessTheNumber.tsx
@@ -29,7 +29,6 @@ export const GuessTheNumber = () => {
 		// Create a transaction using the contract client
 		const tx = await game.guess(
 			{ a_number: BigInt(guess), guesser: address },
-			// @ts-expect-error js-stellar-sdk has bad typings; publicKey is, in fact, allowed
 			{ publicKey: address },
 		)
 
diff --git a/src/hooks/useSubscription.ts b/src/hooks/useSubscription.ts
index 98d5293..110fc0e 100644
--- a/src/hooks/useSubscription.ts
+++ b/src/hooks/useSubscription.ts
@@ -36,7 +36,8 @@ export function useSubscription(
 	pollInterval = 5000,
 ) {
 	const id = `${contractId}:${topic}`
-	paging[id] = paging[id] || {}
+	if (!paging[id]) paging[id] = {}
+	const page = paging[id]
 
 	React.useEffect(() => {
 		let timeoutId: NodeJS.Timeout | null = null
@@ -44,18 +45,17 @@ export function useSubscription(
 
 		async function pollEvents(): Promise<void> {
 			try {
-				if (!paging[id].lastLedgerStart) {
+				if (!page.lastLedgerStart) {
 					const latestLedgerState = await server.getLatestLedger()
-					paging[id].lastLedgerStart = latestLedgerState.sequence
+					page.lastLedgerStart = latestLedgerState.sequence
 				}
 
-				// lastLedgerStart is now guaranteed to be a number
-				const lastLedger = paging[id].lastLedgerStart
+				const lastLedger = page.lastLedgerStart
 
 				const response = await server.getEvents(
-					paging[id].pagingToken
+					page.pagingToken
 						? {
-								cursor: paging[id].pagingToken,
+								cursor: page.pagingToken,
 								filters: [
 									{
 										contractIds: [contractId],
@@ -79,9 +79,9 @@ export function useSubscription(
 							},
 				)
 
-				paging[id].pagingToken = undefined
+				page.pagingToken = undefined
 				if (response.latestLedger) {
-					paging[id].lastLedgerStart = response.latestLedger
+					page.lastLedgerStart = response.latestLedger
 				}
 				if (response.events && response.events.length > 0) {
 					response.events.forEach((event) => {
@@ -94,9 +94,8 @@ export function useSubscription(
 							)
 						}
 					})
-					// Store the cursor from the response for pagination
 					if (response.cursor) {
-						paging[id].pagingToken = response.cursor
+						page.pagingToken = response.cursor
 					}
 				}
 			} catch (error) {