feat: update rpc url for hbarevm

ticket: CECHO-11

Author: rohitsaw115

hardhat.config.ts

@@ -715,15 +715,23 @@ const config: HardhatUserConfig = {
       ]
     },
     thbarevm: {
-      url: 'https://testnet.hashio.io/api',
+      // Hashio relay (0.77.1) rejects contract-creation eth_estimateGas when a
+      // `from` field is present (returns INSUFFICIENT_TX_FEE), which breaks the
+      // deploy scripts. Thirdweb's Hedera gateway handles this correctly.
+      // Keep Hashio/HashScan for contract verification only.
+      url: 'https://296.rpc.thirdweb.com',
       accounts: [
         `${PRIVATE_KEY_FOR_V4_CONTRACT_DEPLOYMENT}`,
         `${PLACEHOLDER_KEY}`,
         `${PRIVATE_KEY_FOR_BATCHER_CONTRACT_DEPLOYMENT}`
       ]
     },
     hbarevm: {
-      url: 'https://mainnet.hashio.io/api',
+      // Hashio relay (0.77.1) rejects contract-creation eth_estimateGas when a
+      // `from` field is present (returns INSUFFICIENT_TX_FEE), which breaks the
+      // deploy scripts. Thirdweb's Hedera gateway handles this correctly.
+      // Keep Hashio/HashScan for contract verification only.
+      url: 'https://295.rpc.thirdweb.com',
       accounts: [
         `${PRIVATE_KEY_FOR_V4_CONTRACT_DEPLOYMENT}`,
         `${PLACEHOLDER_KEY}`,