Episode #125 of the Stack Overflow podcast is here. We talk Tilde Club and mechanical keyboards. Listen now

Questions tagged [offline]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
1
vote
0answers
25 views

How to sign transactions offline via geth for a specific chain?

Is there a way to sign a transaction to be accepted on a specific chain? In other words, if I want to sign an offline transaction via geth, say 0.5 eth from external address A to external address B, ...
0
votes
1answer
62 views

How should one approach the signing of ERC20 token transactions with an offline device?

I use an offline PC as a cold wallet. It works in combination with 2 USB drives: the 1st has Tails OS; the 2nd has my key files, a copy of MyCrypto desktop, and my encrypted account info. I can sign ...
0
votes
0answers
41 views

How to import Txhashes to ETH cold wallet?

I would like to import Txhashes to my cold ETH wallet. The tx's are done on a connected device and transferred securely via QR codes. I can do this with BTC in Electrum but have found no way of doing ...
1
vote
1answer
56 views

In proof of stake, is there a difference between being offline and deciding to leave entirely?

I'm struggling to understand the proof of stake concept. As I understand it, in order to participate in validation and its rewards, you must ante up some ether (I was told a minimum of 32). You are ...
0
votes
1answer
20 views

What happens when crypto is sent to my offline desktop wallet?

I'm planning a switch to a desktop wallet for my crypto accounts. My first choice is Exodus (exodus.io). I understand that because it's a desktop wallet, the machine it's running on obviously needs ...
0
votes
1answer
45 views

Can Raiden Network transfers occur offline?

Since Raiden is off-chain, could I theoretically set up some channels among a group of local parties and conduct transactions offline via NFC, bluetooth, wifidirect, etc.? Since it's off chain and ...
0
votes
2answers
428 views

How multiple people signing works?

I had created a DAO smart contract where around 20 people vote for proposals. They each make new Tx. Offline signing is nice to minimize gas cost. Wondering how offline signing works with contract ...
0
votes
1answer
37 views

Offline transaction like lightening network on Ethereum [closed]

I want to implement transaction process like lightening network. When 2 people do number of transactions between each other, for instance they did 10 transaction with each other. I want to keep all ...
2
votes
1answer
300 views

Interact with smart contract via tx offline signing - possible?

In MyCrypto/MEW you can send an offline tx by signing it offline and broadcasting it online. Can I also somehow interact with a smart contract in the same manner (eg. the kyber network contract)? ...
1
vote
0answers
68 views

how can I use smart contract to sign a transaction on an offline machine

How can I use smart contract to sign a transaction on an offline machine?I want to use geth to sign a transaction offline,who can tell me what I do?Thanks!
0
votes
1answer
162 views

Could Someone Explain this Mutli-Sig Smart Contract? [closed]

This code seems to be a good standard for multisig accounts on the eth chain. Could someone explain it piece by piece for me? https://github.com/christianlundkvist/simple-multisig pragma solidity 0....
2
votes
1answer
545 views

MEW - Is it possible to generate transactions for “Contracts” offline? [duplicate]

I am trying to use MEW on an offline computer under the tab "Contracts". Is this possible ? When I try it, I get to the final step where the pop up box lets me hit the "Generate Transaction" button, ...
0
votes
1answer
174 views

MEW offline transactions broadcasting [duplicate]

When I create a signed transaction on my offline computer and then broadcast it on my online computer. What hinders a node to broadcast it again after my transaction is included in a block?
0
votes
1answer
411 views

Signing Multisig Wallet Contract transactions Offline in geth console

I have setup a multisig contract using the standard Wallet Contract and have been interacting with it on my geth console successfully as per the Mist Wallet Contract wiki entry. So far I've been able ...
0
votes
1answer
52 views

Create broadcastable TX offline on Windows

I made a tool which created 500 transactions that I need to have broadcasted on the network. The data, nonce and other information is all available. The only thing I need is a way to create the ...
3
votes
1answer
4k views

How to build a raw transaction to interact with a contract, with web3.py

Thanks to the support of this community I am able to create transactions on the network using the guidance provided in this post: How to send a transaction to myetherapi.com with Web3.py To send a ...
5
votes
1answer
405 views

Signatures differ in web3js and web3j

I'm using web3J version 3.0.0-alpha4 and hit following problem. When I sign the same raw message (it's simply string like "TEST" for now) I get different signatures using web3js i web3j. The signature ...
1
vote
1answer
701 views

Getting the Nonce for an Account [duplicate]

I know of three ways to get the nonce for an account. MyEtherWallet under the Offline Transactions tab. At the command line with Geth Manually count the number of outgoing transactions for an account ...
0
votes
1answer
964 views

Client Side JavaScript Ethereum Address Generation? [duplicate]

I would like to generate Ethereum addresses clientside with JavaScript, what is the best way to go about doing this? Also, I read that dual Eth-Bitcoin addresses are now possible, and there are many ...
14
votes
1answer
2k views

Issue with “Generating Transaction” with MEW offline

I would like to try to send offline with MEW. I'm using a pc with Window 7, no sp1, never been connected. I have tried with Firefox and Chrome. Been cleaning cache, rebooting. Nothing happens when I ...
3
votes
0answers
240 views

Parity signer issue

I'm trying to send raw transactions throught JSON-RPC api. I'm signing it offline (with python lib) and then using the eth_sendRawTransaction method. The thing is that sometimes it gets broadcasted ...
0
votes
2answers
124 views

Is there a means to archive or keep an offline version of the blockchain for recovery?

I'm fairly new to downloading and mining of the Ethereum blockchain yet I've noticed it takes hours on my 100Mbs connection (haven't even looked at it over the SD-WAN yet). I've ran into some issues ...
0
votes
1answer
402 views

Will this work and be truly cold: Offline cold storage using Bootable USB

I want to generate a cold wallet very securely without having to buy a new computer that will always be offline and while I am waiting for a hardware wallet on back order. Please validate and/or ...
0
votes
1answer
191 views

Does air gapped tx generation guarantee that funds are never stolen?

I think air gap does not guarantee that funds are never stolen. The reason is that you don't know what is inside generated transaction bytes that you copy&paste to an online computer to broadcast....
5
votes
3answers
3k views

How to sign a transaction on an offline computer?

Short version: Is there a way to sign a transaction on an offline-computer using only official or widely trusted tools? Long version of this question: There are several posts on how to do that but ...
1
vote
1answer
671 views

How to sign offline with geth?

I have installed geth on an offline-computer and created a account with ./geth account new. Than I have copied (USB-Stick) the resulting file from the offline-computers keystore/ to an online-computer,...
7
votes
2answers
4k views

Offline Wallet Generation

I created an Ethereum paper wallet using the files from myetherwallet.com on an airgapped computer. But I don't understand how the wallet can be generated and integrated into the blockchain to be able ...
40
votes
6answers
19k views

Create and sign OFFLINE raw transactions?

I'm looking to create a raw transaction, sign it, and broadcast it using the eth.sendRawTransaction RPC method. I would like to do this offline using code or an open-source library OR online but ...
4
votes
2answers
3k views

How can I cancel a not yet pushed transaction in Mist?

I created a transaction while not connected to any nodes in Mist wallet and I don't want to announce it to the network anymore. How do I withdraw this transaction with 0 confirmations? My concern is ...
7
votes
1answer
800 views

Is it possible to sign transactions offline in Mist?

is this planned to be implemented? Would be great to be able to sign transactions securely on an air-gapped machine. I understand that IceBox has offline signing, but they don't support contracts/...
18
votes
4answers
5k views

Is there any safe way to send money from a cold wallet, using an untrusted computer?

You have 2 computers. One is 100% offline and, thus, trusted. Other is online. Private keys are stored on the offline computer and the online computer has no access to it. Is there any way to sign a ...