Hello ethereum experts,

I got the following error in the Chrome's Javascript Console:
ethereum_web3.js?hash=ee8d37819d18de934b202361e374522a33bbd060:3783 Uncaught TypeError: Cannot create property 'from' on string..

I'm on an MacOS(10.12.6) and using using Meteor (1.5) + Metamask. I started geth(1.6.7-stable) with the following commandline: geth --datadir "net_a" --networkid 1234 --rpc --rpcport "8545" --rpccorsdomain "*" --rpcapi "eth,net,web3,personal" console 2>console.log

And the followings are my attempt to send a transaction: // Transaction object var tnxObj = '{from: "'+fromAddr+'", to: "'+toAddr+'", value: "' + amount + '"}'; web3.personal.unlockAccount(fromAddr, "pwd123", function(err, result) { if (err != null) { console.error("Error while unlocking account: "+err); } else{ console.log("Account unlocked!"); web3.eth.sendTransaction({tnxObj} , function(err, result) { if (err != null) { console.error("Error while sending transaction: "+err); } else{ console.log("Transaction Sent!"); } }); } });

Any idea what I did wrong?


tnxObj should be an object, not a string.

Instead of

var tnxObj = '{from: "'+fromAddr+'", to: "'+toAddr+'", value: "' + amount + '"}';

just do

var tnxObj = {from: fromAddr, to: toAddr, value: amount};
| improve this answer | |
  • Thank Mr. Edgar. I have changed the line and now, there is no exception. – Azlan Abd. Aziz Sep 13 '17 at 7:19
  • However, the transaction did not get through. When I check the transaction in the terminal, the value of the 'to:' parameter is 'null'. In other words the recipient's address was lost. Nonetheless, same transaction work in the geth terminal. Thank you again for your help. – Azlan Abd. Aziz Sep 13 '17 at 7:27
  • Thank you Mr. Edgar, it worked! My apology if I took your time. My careless mistake. If you notice the line: 'code' web3.eth.sendTransaction({tnxObj} ...'code' it has extra curly brackets! Took them out and it work. – Azlan Abd. Aziz Sep 13 '17 at 9:26

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