fix: update blockchain helper to use correct contract address for tok…

…en allowance

- Modify getNetwork to explicitly cast network to SupportedChain
- Update allowance retrieval to use BINARY_PREDICTION_CONTRACT_ADDRESS
- Ensure correct contract address is used when checking token allowance

packages/plugin-depin/src/helpers/blockchain.ts

@@ -13,7 +13,7 @@ export const getNetwork = (): SupportedChain => {
     if (!chain) {
         throw new Error("Invalid network");
     }
-    return chain;
+    return network as SupportedChain;
 };
 
 export const resolvePrediction = async (
@@ -234,7 +234,7 @@ const getBetAmount = async (
         address: process.env.PREDICTION_TOKEN as `0x${string}`,
         abi: erc20Abi,
         functionName: "allowance",
-        args: [bettor, account],
+        args: [bettor, process.env.BINARY_PREDICTION_CONTRACT_ADDRESS as `0x${string}`],
     })) as bigint;
 
     if (allowance <= BigInt(0)) {