Fix zilpay connection issue

Author: stevenkhong

src/app/saga/app/blockchainSaga.ts

@@ -296,12 +296,18 @@ function* initialize(
 
     const { network, wallet } = action.payload
     const sdkState = (yield select((state: RootState) => state.carbonSDK.sdkCache)) as SimpleMap<CarbonSDK>
-    if (!sdkState[network]) {
-      const carbonNetwork = netZilToCarbon(network)
-      const carbonSDK: CarbonSDK = yield call(CarbonSDK.instance, {
-        network: carbonNetwork,
-      })
-      yield put(actions.CarbonSDK.updateCarbonSDK({ sdk: carbonSDK, network: network }))
+    try {
+      if (!sdkState[network]) {
+        const carbonNetwork = netZilToCarbon(network)
+        const carbonSDK: CarbonSDK = yield call(CarbonSDK.instance, {
+          network: carbonNetwork,
+          skipInit: true, // skip initialization while carbon chain undergoes upgrade.
+        })
+        yield put(actions.CarbonSDK.updateCarbonSDK({ sdk: carbonSDK, network: network }))
+      }
+    } catch (error) {
+      console.warn("failed to initialize Carbon SDK");
+      console.error(error);
     }
     const providerOrKey = getProviderOrKeyFromWallet(wallet)
     const { observingTxs } = getTransactions(yield select())

src/app/utils/bridge.ts

@@ -1,5 +1,4 @@
 import { Blockchain, CarbonSDK, ConnectedCarbonSDK } from 'carbon-js-sdk'
-import { Token } from 'carbon-js-sdk/lib/codec'
 import { SimpleMap } from 'carbon-js-sdk/lib/util/type'
 import { Network } from "zilswap-sdk/lib/constants"
 import { BridgeableChains, BridgeableEvmChains } from 'app/store/types'
@@ -54,23 +53,6 @@ export const getTokenDenoms = (network: CarbonSDK.Network, chain: Blockchain) =>
   return getTokenDenomList(network)[chain]
 }
 
-/**
- * Returns a mapping of chains to their respective SWTH token info
- * @param {CarbonSDK.Network} network 
- * @returns {SimpleMap<Token>}
- */
-export const getSwthBridgeTokens = async (network: CarbonSDK.Network) => {
-  var ret: SimpleMap<Token> = {}
-  const carbonSdk: CarbonSDK = await CarbonSDK.instance({ network })
-  const carbonTokens: Token[] = Object.values(carbonSdk.token.tokens)
-  const swthBridgeDenoms = getTokenDenomList(network)
-  Object.entries(swthBridgeDenoms).forEach(([chain, denom]) => {
-    const swthToken = carbonTokens.find(d => d.denom === denom)!
-    ret[chain] = swthToken
-  })
-  return ret
-}
-
 /**
  * Returns a readonly map of EVM Blockchains to their respective chain IDs
  * @param {Network} network The selected Zilliqa network based on wallet (mainnet/ testnet)
@@ -288,4 +270,4 @@ export const getChainParams = (network: Network) => {
         },
       }
   }
-}
+}