#71 Fix crash on failing ETH/ERC20 balance requests.

iguana/exchanges/etomicswap/etomiclib.cpp

@@ -554,10 +554,14 @@ char* getPubKeyFromPriv(char* privKey)
 uint64_t getEthBalance(char* address)
 {
     char* hexBalance = getEthBalanceRequest(address);
+    if (hexBalance != NULL) {
         // convert wei to satoshi
         u256 balance = jsToU256(hexBalance) / boost::multiprecision::pow(u256(10), 10);
         free(hexBalance);
         return static_cast<uint64_t>(balance);
+    } else {
+        return 0;
+    }
 }
 
 uint64_t getErc20BalanceSatoshi(char *address, char *tokenAddress, uint8_t setDecimals)
@@ -569,6 +573,7 @@ uint64_t getErc20BalanceSatoshi(char *address, char *tokenAddress, uint8_t setDe
     char* hexBalance = ethCall(tokenAddress, ss.str().c_str());
     // convert wei to satoshi
     uint8_t decimals;
+    if (hexBalance != NULL) {
         if (setDecimals > 0) {
             decimals = setDecimals;
         } else {
@@ -582,6 +587,9 @@ uint64_t getErc20BalanceSatoshi(char *address, char *tokenAddress, uint8_t setDe
         balance /= boost::multiprecision::pow(u256(10), 10);
         free(hexBalance);
         return static_cast<uint64_t>(balance);
+    } else {
+        return 0;
+    }
 }
 
 char *getErc20BalanceHexWei(char *address, char *tokenAddress)