All Questions
Tagged with ethereum-wallet-dapp contract-design
18 questions
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there is a bot code on you tube [duplicate]
there is a bot code on you tube, where can i go to check if its a scam> here is the code.
code:
https://codepastes.com/raw/wJLpHt
you tube:
https://youtu.be/a2oGKFSWhuk?si=gJiqVdatk17qXi2f
2
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1
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I need help understanding differences between Inheritance/Import vs Separate Contract vs Libraries/Interface
I understand that for good organization and to preserve flexibility, it is good practice to separate code by functionality. For example: separate your datastorage from app logic. To do this, AFAIK, we ...
- 21
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1k
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Can I automatically forward transactions from a given address?
The challenge is to provably promise to transfer a transaction from address X to address Y. Basically, I need to be able to convince Y that if I get the money from X - it's going straight to Y. X is ...
- 101
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224
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when do smart contract wallets need to sign transaction by themselves?
Do smart contract wallets ever store priv/pub keys or something ? Of course, It would be then seen on the blockchain if it did, but I am asking this because somewhere, I've read that sometimes smart ...
- 1,185
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97
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wallet and smart contract connection
I am just here to make sure that i understand what smart contract wallet and what wallet means. These 2 guesses of mine are highly related so what my question is simple. Am I right about assuming the ...
- 1,185
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1
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2k
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Transfer all msg.sender.balance to contract, without requiring user to input the msg.value?
Is there a way to drain all the user.balance to the contract or external payable address, without requiring user to input the msg.value?
The most intuitive version I had looks a bit like this on ...
- 35
2
votes
1
answer
334
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Sending private key to server side
I am trying to build new Dapp application for our startup by using web3j , I am facing an issue with signing the transaction from server side , because i need to know the private key for the client (...
- 23
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68
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What is a suitable pattern for building a web/mobile app that leverages ether? [closed]
Noob to ether dev.
Looking to understand how to build an app that leverages Ethereum - what suitable patterns are out there (ideally to go via some tutorials).
A few apps examples (from easy to ...
- 33
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1
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424
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Ethereum wallet and private key [duplicate]
how to generate public and private key for each user on my decentralized app?
After filling the app on ethereum network?
0
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1
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160
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Ethereum full stack application development
I am novice solidity developer and I am trying to develop a voting application on ethereum
Requirements of application are -
1) There should be candidate and voter registration form
2) Voter ...
- 2,577
0
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1
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246
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how to transfer token with timestamp to restrict token transfer
I am working on basic ERC20 token smart contract and i would like to add some conditions in token transfer
Suppose, I transfer 100 tokens to receiver on 2018-03-01 then receiver can't sent that 100 ...
1
vote
1
answer
60
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Is this 'good enough' randomness?
Say I wanted to create a system on the Ethereum network to place bets on a prize pool that was under the current block reward say 2.5 ETH.
Would these steps be a reasonably fair way to make sure ...
- 504
0
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1
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73
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Ethereum wallet does not allow transaction even after proper conditions
Ethereum Wallet shows "It seems this transaction will fail ......" even though I've used if/else inside contracts to ensure that transfer value does not go higher than contract balance.`
function ...
- 440
1
vote
1
answer
130
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retrieving tokens from contract
I am using the MyAdvancedToken code from: https://www.ethereum.org/token
I transferred tokens from owner account into the contract, to fund any buy(). Now, I want those tokens back. Is there any ...
- 113
0
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1
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166
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Not able to read Array of Addresses in Function
function approveUsers(address[] users) onlyOwner {
for(uint i=0; i<users.length; i++) {
approvedUsers[users[i]] = true; //Mapping {address: bool}
ApproveUserForPreSale(users[i], ...
2
votes
1
answer
894
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In an Ethereum smart contract, can I check the balance of other ERC20 tokens from the sending address of a recieved transaction?
I'm currently designing a smart contract, where I'd basically like to incorporate a "coupon" like relationship between two different coins. Bob can send the smart contract CoinA, and receive CoinB as ...
1
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1
answer
688
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How to go about user login in an Ethereum web DApp?
The approach I'm currently using in my DApp is mapping Ethereum addresses to a solidity struct which contains all of that specific user's data. But since the address is publicly available can't ...
- 125
9
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1
answer
619
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Ethereum Wallet Contract with two owners can't transfer ETH
I set second owner for contract with ETH and dailly limit for transfers. I can transfer ETH under this limit. But large quantity transfer (to DAO contract) is not work. One owner (my first account in ...
- 91