All Questions
6 questions
2
votes
2
answers
158
views
Can a contract check an existing transaction for validation?
I am new to smart contract development so any help or guidance is appreciated.
I am thinking of creating a contract that checks if a certain transaction has already been done for validation. Is that ...
2
votes
1
answer
137
views
transactions are performed sequentially by the blockchain, but how are the waiting times managed?
I have a booking dapp where you can make reservations and call the bookRequest method. If many users call this method, it is not possible to know the order in which they will be performed and ...
- 187
0
votes
3
answers
401
views
How do i keep a contract's value changed by another one constant?
There are 3 contracts; A, B, and C. C has a state variable with a default value. A changes that state variable to Yerevan. After that, B sees that variable. Evaluating by A is successful but B sees ...
- 567
1
vote
2
answers
2k
views
How to get transaction status (programatically, not etherscan)?
I have a problem when I interact with an Smart Contract, from a javascript webapp. I can execute the transaction correctly when the status is confirmed, but I cannot get any error response when it ...
- 1,998
-1
votes
2
answers
486
views
Multiple transactions submitted at the same time asked me to ask questions
I submit two transactions at the same time, will be incorrect like that
java.lang.RuntimeException: Error processing transaction request: known transaction: ...
- 9
1
vote
0
answers
53
views
Is there a way to halt a transaction from being confirmed until an event occurs?
For example, user 1 sends a transaction to user 2, but that transaction is not able to be confirmed until an event occurs, allowing the transaction to be confirmed and thus sent into user 2's wallet.
...
- 11