fix: Ethereum errors on send

lib/plugins/wallet/geth/base.js

@@ -41,6 +41,7 @@ function connect (url) {
 }
 
 const hex = bigNum => '0x' + bigNum.integerValue(BN.ROUND_DOWN).toString(16)
+const bn2bn = bn => BN(bn.toString(16), 16)
 
 function privateKey (account) {
   return defaultWallet(account).getPrivateKey()
@@ -115,9 +116,9 @@ function generateTx (_toAddress, wallet, amount, includesFee, cryptoCode) {
 
   return Promise.all(promises)
     .then(([gas, gasPrice, txCount]) => [
-      gas,
-      gasPrice,
-      _.max([txCount, lastUsedNonces[fromAddress] + 1])
+      bn2bn(gas),
+      bn2bn(gasPrice),
+      _.max([1, txCount, lastUsedNonces[fromAddress] + 1])
     ])
     .then(([gas, gasPrice, txCount]) => {
       lastUsedNonces[fromAddress] = txCount
@@ -126,20 +127,20 @@ function generateTx (_toAddress, wallet, amount, includesFee, cryptoCode) {
         ? amount.minus(gasPrice.times(gas))
         : amount
 
-      const contract = web3.eth.contract(ABI.ERC20).at(toAddress)
-
       const rawTx = {
         chainId: 1,
         nonce: txCount,
         gasPrice: hex(gasPrice),
-        gasLimit: gas,
+        gasLimit: hex(gas),
         to: toAddress,
         from: fromAddress,
         value: isErc20Token ? hex(BN(0)) : hex(toSend)
       }
 
-      if (isErc20Token && contract) {
-        rawTx.data = contract.transfer.getData(toAddress, hex(toSend))
+      if (isErc20Token) {
+        const contract = web3.eth.contract(ABI.ERC20).at(toAddress)
+        if (contract)
+          rawTx.data = contract.transfer.getData(toAddress, hex(toSend))
       }
 
       const tx = new Tx(rawTx)