All Questions
Tagged with transactions contract-invocation
23 questions with no upvoted or accepted answers
2
votes
2
answers
4k
views
How can I invoke an approve() function call from the user and not the contract?
I am working on a basic staking platform for practice. I understand that the user of the platform has to call the approve() function and pass the contract into it in order for the contract to use the ...
- 23
2
votes
1
answer
6k
views
ENS on Rinkeby - Network does not support ENS?
I was able to register the ENS domain on Rinkeby, as the network supports ENS.
My TX: https://rinkeby.etherscan.io/tx/0xd42b64ab03387d7ca405e7ba7b85ce893444a141e7a7de174f0361e2c4231674
My subdomain: ...
- 1,011
2
votes
0
answers
124
views
How to know the reason of transaction's reversion in parity?
I am testing ERC20 USDT contract locally with parity. I imported contract to my private testnet and manually generated raw transaction that calls "transfer" method of contract. I send it to the node ...
- 263
1
vote
1
answer
184
views
getEthToTokenInputPrice miner hack?
Plan to use getEthToTokenInputPrice in a Dapp. I was going to just use a larger sample size spread out over a large time period to mitigate flash loan price manipulation. Someone said this was ...
1
vote
1
answer
78
views
How keccak hashing and for loop happening in pure function?
I put a keccak hashing inside pure function, it works and return me the result.It also works in a for loop. I studied that hashing the data and loop consumes consider amount of gas. Do we need to ...
- 27
1
vote
1
answer
301
views
Byte32 error, even after converting string to hex
I looked everywhere for people with similar problems, but I couldn't find anything.
I am confused why I keep getting this error (yes, I know others have had this error too, but not for the same ...
- 11
1
vote
0
answers
259
views
How to access data from web3.eth.Contracts.send() function?
If I run this chunk of code from my async function I will get a transaction receipt as an output:
const response = await contract.methods.recoverAddr(hex_msg,
v_decimal,r, s).send({from: accounts[0]}...
1
vote
0
answers
74
views
Possibly hacked but not sure Help!
I recently had most ERC20 tokens moved from a MEW wallet through the individual ERC20 contracts. Does anyone know how this may have happened? I am sending pertinent info from one on etherscan.io
1)...
1
vote
2
answers
823
views
How to track incoming to smart contract transactions using web3js?
I've got one Ethereum smart contract which calls functions of the other one. How could I track these calls using web3js or some other tool if it is possible at all? I need it because I want to execute ...
1
vote
0
answers
524
views
How to get transaction hash at time of invoking function?
I have a function as follows:
function setEnergy(address dev, uint256 energy) public returns (bool) {
require(dev != address(0));
amount[dev].energyValue = amount[dev].energyValue + energy;
...
- 2,700
1
vote
1
answer
682
views
How to simulate multiple consecutive transactions and get the resulting state?
I'm trying to simulate a transaction on the public blockchain that invokes a contract's method with certain parameters. Then I want to make a follow-up transaction with some other method call.
I ...
- 181
1
vote
0
answers
115
views
Implementing a reinforced invoice?
I have a question. My contract structure involves 2 user at address A and B respectively:
First A trigger the logging method from the contract with B's address as parameter. This will record a ...
- 11
0
votes
1
answer
89
views
Transaction Hijacking?
So I created a wallet and sent it some funds then I submitted a few invalid transactions. I approved the correct address for transferring wrapped eth. After the approval my script immediately sent the ...
0
votes
0
answers
110
views
why cant smart contract receive ether like externally owned account without a receive/fallback function?
why do smart contracts requires a receive function to accept ether? what prevents the smart contract from receiving ether like an externally owned account(EOA) directly without any functions?
What was ...
- 103
0
votes
0
answers
26
views
Does transferring funds from a contract to an unclaimed address create a new account?
I sent funds to some addresses via a proxy contract and later couldn't find those addresses on a block explorer. Sending directly from metamask to one of those addresses did reveal the address on the ...
- 308
0
votes
1
answer
60
views
Is a transaction between 2 contracts possible if the tx origin is one of those contracts?
In other words, can a contract initiate a transaction by itself, without someone activating it's code? An example would be if a contract can do that when times eg. reaches a specific point.
0
votes
0
answers
97
views
Recreate transaction log in solidity code
I have this log and i want to code a solidity contract/function that would do the same.
What i understand reading this transaction is that WBNB contract (0xbb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c) is ...
- 13
0
votes
0
answers
22
views
How to find out what happened with a contract transaction
I have a question regarding one transaction which happened at the 17th of January 2018: https://etherscan.io/tx/0xabe5ac6176e1096bf4fbfa983cb8b04262ae1d57daf94ebb1668b5d45e3145f4 It should be ...
- 101
0
votes
1
answer
31
views
Do smart contract transactions get signed?
When you send a transaction to a smart contract by using the contract.methods.methodName().send() is it signed by the sender? If not how can I link the sender to that transaction call
- 73
0
votes
0
answers
132
views
How can execute function that send ether in geth console?
I want to execute the send function that sends ether from the sender to the receiver, the code is as shown below.
contract Sender {
function send(address _receiver , uint amount) public ...
- 21
0
votes
0
answers
192
views
How do I send a transaction to a smart contract?
I need to build this transaction and send it to the blockchain how do I do it ?
I always used ethsendrawTransaction just to send eth but never I never built this type of transaction:
{
"data": [
...
- 571
0
votes
0
answers
43
views
How do i get to return value form one smart contract function into another smart contract on private ethereum network?
Here it is my called function.
pragma solidity ^0.4.19;
contract Called{
string public name;
function set(string _var) {
name = _var;
}
function get() view returns (...
- 31
0
votes
1
answer
63
views
what information is provided to the miner with the transaction
I am wondering what information is provided to the miner with a transaction that needs to invoke a contract?
I thought about Gas, GasPrice, name of function to invoke and input.
But, whether the ...
- 363