Linked Questions

1
vote
1answer
178 views

Port requirements for a Light-Node?

For a light client (geth --light or parity --light) running the light client protocol what are the port requirements? Incoming: Does a light client expose a port where he accepts incoming ...
15
votes
1answer
22k views

How can I reverse or cancel a transaction or recover lost ethers?

Transactions (using a smart contract like a token or sending ether), by design, are immutable on the blockchain. What methods can be used to (more or less) unilaterally reverse a transaction made by ...
1
vote
0answers
118 views

Unlock account on Ethereum client, or sign every transaction sent it to Ethereum client?

I have a contract which needs to be updated occasionally. For this purpose, I set up an Ethereum client, namely, a Parity node. At this point, I see several ways of carrying out the specified task: ...
1
vote
1answer
482 views

Geth account unlocked for 2 seconds

My question relates to a older question on this stackexchange. Details Patrick used the Ethereum Wallet to transfer 1 ether to test out buying TheDAO tokens on his mining computer. When (so far it ...
35
votes
1answer
26k views

What are ipc and rpc?

The question is quite simple , I have only basic Idea of RPC but none of IPC. AFAIK, if I connect to ethereum node via ipc then the my geth should be running on same machine. and If I connect via ...
7
votes
2answers
4k views

Do I have to unlock my account in geth to call a web3.eth.sign() in JavaScript?

I have: A geth account Access to web3 API I want to: Invoke the function, web3.eth.sign(coinbase, sha) If I put this in a javascript file sign.js, and I call node.js, will it sign my message? Or ...
44
votes
3answers
38k views

How to call a contract method using the eth_call JSON-RPC API

Ok, so I'm trying to call a contract method using the methods provided by the Ethereum JSON RPC interface. The JSON RPC is running on an Ubuntu machine. Unfortunately, I can't really get a result back ...
1
vote
1answer
1k views

Is it possible to hack an ethereum account? [duplicate]

I want to know if is it possible to hack an Ethereum account?
1
vote
2answers
259 views

How to safely node.js script which uses geth, without risking external actors accessing it with --rpc?

So if I want to write a script which uses geth and web3, the first that comes to mind is starting geth with --rpc enabled. Will this risk the wallet being accessed from outside? Is there a way of ...
2
votes
2answers
463 views

How can i publish smart contracts accessible from all client

I've developed a simple smart contracts with browser solidity: pragma solidity ^0.4.9; contract demo { string public name="Pietro"; function changeName(string _newName){ name=_newName; ...
4
votes
3answers
7k views

Geth stopped syncing after a while

Running geth on clean ubuntu 14.04 x64 After running geth --fast syncing stoppes on some point, like that: I0321 11:31:39.971284 core/blockchain.go:959] imported 256 block(s) (0 queued 0 ignored) ...
2
votes
1answer
266 views

Can I access my account using some http request?

I am accessing my accounts and everything using Ethereum Wallet (Mist) but I was wondering is there any possible way to access my account using some http request?
5
votes
2answers
2k views

Is it possible to unlock a geth wallet through JSON RPC? [duplicate]

I'm currently developing an application on top of Ethereum's JSON RPC. I would like to be able to unlock and lock the wallet as needed, similar to how Bitcoin does it. However, it seems that at the ...
7
votes
1answer
571 views

How can I list The DAO proposals and vote from the command line?

Are there any command line tools to vote on The DAO proposals? I would like to: List the open proposals Check whether I have already voted on these proposals Check my voting history Vote on the ...
5
votes
2answers
4k views

Error: account is locked. Attempting to send ether from one account to another, Local Node on Private Blockchain

What is the correct process to unlock an account? I was able to do this successfully in the geth console(see this post for more details on what I've tried Why does account show 0 balance, after ...