Questions tagged [wallets]

Wallets are applications on top of accounts, so called smart contracts, which manage your Ether. There are simple savings wallets or multisignature wallets.

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In solidity, struct has some mistaken?

contract MyContract { struct Posposal{ uint posposalId;//防止复核数组变动时 address voteSponsorAddr;//投票发起人 bytes1 description_;//投票内容信息 0 转币 以后扩展 uint userId;//投票给目标以太币地址所对应的id uint ...
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2k views

How to transfer to wallet

I have setup 3 rig's With GPU mining and I'm currently averaging around 25 - 30 MH/s with my test setup. The rig is setup using QTminer and I can see that ETH is coming in to my account and I have ...
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524 views

Ether.li Wallet lost?

I created a Ether.li wallet but missed to press the finish button on the page where you note your keys. Then i transferred money to the wallet which was not saved. After i got on the Ether.li hompage ...
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2answers
174 views

Ethereum hangs after 3 days uploading the blockchain, do I even need the blockchain to have a wallet?

I have downloaded and run Ethereum Wallet 0.9.0 Mist. It started updating about 3 days ago. It runs, but then when it is very near the end, e.g. 300-ish blocks to go, it seems to slow down and stop. I ...
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4answers
816 views

How to implement a watching wallet for thousands/millions of addresses

I need to check for customers' deposits and need to scan for receiving transactions for those addresses for Ether and in next step ERC-20 tokens. What's the most efficient way to do this with go-...
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17 views

'dropped and replaced' ETH still missing

I have an ETH transaction that is listed as 'dropped and replaced' on Etherscan: https://etherscan.io/tx/0x98640241cd77a4c1301c8522851ec07508ac783239c643a4a3c13b1dc55d9ea1 On Uniswap it shows as ...
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17 views

what is the role of the wallet?

I'm working on an ethereum blockchain project where people want to make reservations in a city. I'm in this situatin I have many users booking, but I want all these bookings to be collected by a ...
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1answer
36 views

How are Metamask web wallets traceable to owner identity?

When creating a Metamask wallet as a Chrome browser extension, what are all the different identifiers that match the wallet to its owner? Since it takes a password to log into the Metamask wallet, ...
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1answer
69 views

Best way to go about connecting multiple wallets to Dapp

What I want: A user to connect a wallet to my dapp (1 of 4 choices, say: Metamask, WalletConnect, Formatic and Portis). The flexibility to create a custom "wallet connect modal" (I've tried ...
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27 views

How do I get started with Ethereum in practical terms?

I've read on the official website. I understand the "overall idea". I also think I can buy Ether, so that's also not what I'm asking. I'm simply wondering how I actually start using it. The ...
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1answer
139 views

web3.py ( web3.exceptions.CannotHandleRequest: Could not discover provider while making request: method:eth_call ) --help

proveedores= ['https://mainnet.infura.io/v3/KEY_KEY','https://ropsten.infura.io/v3/KEY_KEY'] from web3 import Web3 , HTTPProvider, IPCProvider, WebsocketProvider from web3.auto import w3 web3= Web3(...
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47 views

In Web3, why is simply signing transactions with private key more secure than unlocking the account and using sendTransaction?

In Can anybody Point out the Difference between Web3.eth.sendTransaction and web3.eth.signTransaction?, the author of https://ethereum.stackexchange.com/a/73705/61096 mentions how unlocking an account ...
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1answer
927 views

Transaction Failed but showing as Pending on Etherscan

So I just started using ether after the same was legalized in my country (India). I use Coinbase Wallet for my Storage of ether. I decided to shift to Metamask from Coinbase Wallet and as such ...
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1answer
40 views

Which Mobile Wallet support *data* field?

Referring to this link ERC: Standard URI scheme with metadata, value and byte code #67 Since it was proposed in 2016, may I know if there is any mobile wallet that can scan QR code with these 4 ...
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2answers
167 views

HD paths on MyEthereumWallet

I hae some coins on MyEthereumWallet, that I can see in block explorer, but can not access it. I think that the mnemoic and password is correct. My assumption is that I messed up something with the HD ...
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31 views

RE: Universal Wallet

I would like to create a multi currency wallet as a POC. I am currently able to make a wallet for Ethereum (Like balance, tx and all) but would like to create it for other as well (like Bitcoin). I ...
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1answer
59 views

Different address make same signature for one message

Is it possible two different wallets (address) make the same signature for one message? I have one message: '...
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0answers
31 views

How to allow mobile wallets to sign and access to my dapp

I'm building a dapp application on Ethereum using React & Web3js. As usual the dapp will get the injected provider from Window.web3 (MetaMask), perhaps. The problem that I'm facing now is how can ...
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1answer
834 views

How to recover/find metamask wallet file

So I had foolishly kept my metamask passphrase only on StickyNotes. This meant when my computer crashed, I had to reinstall all my programs, but all my files remained. For some reason my stickynotes ...
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18 views

Account & Block Polling not happening properly for the DApp in Trust Wallet Browser

my DApp works fine in desktop/laptop using metamask which polls the accounts and blocks (1500ms and 3000ms respectively), as set in the drizzle options. But the same DApp when I open in trust wallet ...
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41 views

Why a buffer is required in the process of creating keys from the seed

This hdkey library is creating a Buffer in the process of creating keys as an example. var HDKey = require('hdkey') var seed = '...
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1answer
31 views

How to update the balance of a wallet user when there are two competing chains?

I am building a wallet, and I have a question about uncle blocks. Let’s say our user sends a transaction, but there are two competing blockchains. If they both include her transaction, no problem. We ...
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1answer
41 views

Saving ethers in local private testnet

I created a private ethereum tesnet using geth and it runs well on the system. However, I lose all the ethers in my account everytime I close the application. Is there a way to permanently save the ...
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44 views

Is there a way to figure out if 2 (or more) address is belong to same HD Wallet account or not?

I'm a new to Wallet concept, I know that a HD Wallet structure is created from a root seed as Mnemonic Code, from that HD Wallet help to generate child keys as the meaning of multiple difference ...
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24 views

What are the available ethereum/erc20 standard wallet on China's appstore?

Heard that ImToken wallet is removed from Chinese appstore ; Am looking for a ethereum based wallet that could be downloaded from the Chinese appstore.
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2answers
246 views

How Does Exchanges Implement Gas Fees for ERC20 Tokens

Any crypto exchange like binance, bitfinex and so on let you deposit and withdraw various ERC20 tokens. Technically I don't understand how they implement gas fees when I withdraw? I deposited 100 ...
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0answers
333 views

Storing private key in javascript variable or local storage

I am creating my own wallet as hobby project. I want to avoid using metamask, so idea is to store private key encrypted(AES) on my server, where salt will be my password. When I enter password and ...
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23 views

Wallet files in a Dapp

I am developing an application from the truffle webpack and I have created my own wallet, adding my account to a json file: $.getJSON('../wallet.json', function(data) { var password = "xxx"; ...
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54 views

How to import the web light-wallet into metamask?

with the same seeds it looks like it will generate different addresses, is that because i am using the testing node or? If I use the same type of node, I can import the light wallet into metamask ...
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16 views

is light-wallet has problem for keys and addresses?

somebody said for light wallet on github, the address generated and private key is wrong? I saw on post, is that true?
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108 views

mist or wallet for macos can't connect to private-net

mist or wallet for macos(version 0.11.1) can't connect to private-net. using command: ./Ethereum\ Wallet --rpc http://localhost:8545 but mist or wallet (version 0.9.3) works. why? tks!
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68 views

I noticed for light wallet,it is BIP32 and BIP39,how can I import the wallet into metamask

I use github light wallet, it is BIP 32 and BIP 39, how can I import the wallet into metamask or myetherwallet, I tried but not working, also, the default path is m/0'/0'/0' in light wallet
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86 views

Web3J - Creation of Light Wallet takes too long

I am creating the wallet in my Android app, using the library Web3j: https://web3j.io/ See the code: String seed = UUID.randomUUID().toString(); ECKeyPair exKey = Keys.createEcKeyPair(); WalletFile ...
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1answer
36 views

Ethereum Contract Simplify

I'm confused about 'contracts' in Ethereum. When do I need a 'contract'? For the scope of my app: I want user to be able to generate ETH address, receive and send out ETHER and I should be able to ...
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199 views

how do you handle token value data type in database?

Ones who do exchange / Investment platforms development, all ERC20 tokens has its atomic unit and only moved by specifying value in its atomic form. for eg: 1 BuritoToken with unit decimals as 18, ...
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1answer
208 views

How can I provide an ethereum public address to each user registering on my website.?

is it possible to do using web3.js for a dapp that is going to be run on mainnet.? I have a requirement to assign valid ethereum address to each user who are registering on my website. I want this ...
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0answers
176 views

Best way to process withdrawals for ETH?

New to ETH. Designing a web-wallet type of service. Currently generating new deposit address keypairs via web3.eth.personal.newAccount(). Iterating each block via web3.eth.getBlock(), and scanning the ...
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1answer
72 views

About Ethereum password

I joined Ethereum 's ICO in 2014. But I forgot my password. I have a keystore file but I do not know my password... So I am thinking of brute force attack on my wallet. Please tell me the password ...
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2answers
781 views

geth: command not found (Ubuntu)

I have Ubuntu 18.04 installed, and I just installed Mist. To my understanding, installing Mist should have installed Geth as well, but when I do the command geth in a terminal, I receive geth: ...
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118 views

Library for create ethereum wallet

I want to create an ethereum wallet that is erc20 compatible on my client side. It should allow user to enter his own password and generate private key, recovery phrases and utc file. I try to ...
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0answers
198 views

Custom token wallet

So custom coins/token sites always have their wallets on their site. The site generates the wallet for them. I saw the post about generating a wallet, and I have seen the ether wallet api and how to ...
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43 views

How do I generate multiple address for ethereum which have no contract on it

I want to generate 10000 addresses which do not have contract on it and can send and receive ethereum from non smart contract exchanges like Koinex in India.
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47 views

How does hosted wallets works?

How does hosted wallets works, Anyone can write about it step by step? I have noticed, Companies who provides hosted wallets stores all funds of their users and users are just provided deposit ...
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1answer
176 views

Should I use the same wallet address everywhere, or different addresses?

I'm fairly new to Ethereum and I'm interested in learning about standard practice. I currently have three wallet apps I use for Ethereum: The official Ethereum Wallet for macOS MetaMask for Chrome ...
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0answers
464 views

Is there an API or library available to integrate an ERC20 compatible wallet into my android app?

If the android app being developed is going to display balances and allow sending and receiving of ERC20 tokens, is there an API or library that people would recommend for this functionality?
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1answer
770 views

web3.isConnected() returns false when connecting to geth with web3.js

I am totally new to cryptocurrency stuff. I have installed geth and web3. I want to build a web page showing account balance. I start geth with below command build/bin/geth --rpc --rpcaddr 127.0.0.1 ...
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2answers
121 views

Wallet of ERC20 token

okay so i am making a mobile application where i want to place the ERC20 wallet with that application ? so my question is : is it possible to do this ? how much will it be secure ?
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0answers
259 views

How can I create or setup multiple accounts for Rinkeby in a Truffle environment?

I use ethereumjs-wallet along with truffle-wallet-provider to connect my Rinkeby account to Truffle: var rinkebyPrivateKey = new Buffer(process.env["RINKEBY_PRIVATE_KEY"], "hex") var rinkebyWallet = ...
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2answers
72 views

Creating account. How to use Keystore file

I'm currently creating an account and I just got my keystore file. I'm curious as to how I use this if my account is lost or I lost my password. Do I have to use any of the text in the file or do I ...
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0answers
223 views

How can I check if the tokens that I have in a certain wallet are valid

With the rise of so many ICOs and ERC20 tokens, I decided to join one of them out of curiosity but their token sale had finished and I decided to purchase some from an exchange, but the company behind ...