How to charge percentage of transaction cost? Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)Error: “message”:“function ”Ballot“ arguments must include ”proposalNames“”}Solidity browser compiler function gas cost vs actual transaction costEstimating gas cost of a transaction function with web3Transaction write limitshow to estimate gas cost?How is Ethereum Wallet's transaction cost calculated?Web3 sendSignedTransaction Transaction costInternal transaction cost vs externalUntransferable token percentageSolidity Language: Fractional Percentage Numbers:
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How to charge percentage of transaction cost?
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)Error: “message”:“function ”Ballot“ arguments must include ”proposalNames“”}Solidity browser compiler function gas cost vs actual transaction costEstimating gas cost of a transaction function with web3Transaction write limitshow to estimate gas cost?How is Ethereum Wallet's transaction cost calculated?Web3 sendSignedTransaction Transaction costInternal transaction cost vs externalUntransferable token percentageSolidity Language: Fractional Percentage Numbers:
Example:
uint public createPostCost = 0.0003 ether;
function createPost(bytes32 _post)
public payable
require(msg.value >= createPostCost);
Post memory newPost;
newPost.post = _post;
Within a discussion forum dapp, the current implementation charges users a set fee per post created. I would like the charge to be dynamic, say 10% of the gas cost of the transaction. Is this possible to implement in the contract? Or is this something for front-end web3 to handle?
solidity web3js contract-development gas gas-limit
edited 4 hours ago
shane
2,4524832
asked 4 hours ago
Jaren LJaren L
335
add a comment |
Example:
uint public createPostCost = 0.0003 ether;
function createPost(bytes32 _post)
public payable
require(msg.value >= createPostCost);
Post memory newPost;
newPost.post = _post;
Within a discussion forum dapp, the current implementation charges users a set fee per post created. I would like the charge to be dynamic, say 10% of the gas cost of the transaction. Is this possible to implement in the contract? Or is this something for front-end web3 to handle?
solidity web3js contract-development gas gas-limit
edited 4 hours ago
shane
2,4524832
asked 4 hours ago
Jaren LJaren L
335
add a comment |
Example:
uint public createPostCost = 0.0003 ether;
function createPost(bytes32 _post)
public payable
require(msg.value >= createPostCost);
Post memory newPost;
newPost.post = _post;
Within a discussion forum dapp, the current implementation charges users a set fee per post created. I would like the charge to be dynamic, say 10% of the gas cost of the transaction. Is this possible to implement in the contract? Or is this something for front-end web3 to handle?
solidity web3js contract-development gas gas-limit
edited 4 hours ago
shane
2,4524832
asked 4 hours ago
Jaren LJaren L
335
Example:
uint public createPostCost = 0.0003 ether;
function createPost(bytes32 _post)
public payable
require(msg.value >= createPostCost);
Post memory newPost;
newPost.post = _post;
Within a discussion forum dapp, the current implementation charges users a set fee per post created. I would like the charge to be dynamic, say 10% of the gas cost of the transaction. Is this possible to implement in the contract? Or is this something for front-end web3 to handle?
solidity web3js contract-development gas gas-limit
solidity web3js contract-development gas gas-limit
edited 4 hours ago
shane
2,4524832
asked 4 hours ago
Jaren LJaren L
335
edited 4 hours ago
shane
2,4524832
asked 4 hours ago
Jaren LJaren L
335
edited 4 hours ago
shane
2,4524832
edited 4 hours ago
shane
2,4524832
edited 4 hours ago
shane
2,4524832
2,4524832
asked 4 hours ago
Jaren LJaren L
335
asked 4 hours ago
Jaren LJaren L
335
asked 4 hours ago
Jaren LJaren L
335
335
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Yes, you can let the charge be a function of the gas of the transaction. You would do something like this:
uint256 charge = gasleft() / 10;
This is sensitive and you should know that gasleft() returns the amount of gas available at that point in the execution. Therefore, if you call gasleft() at the beginning of a function, the number will be higher than at the end of the function.
Additionally, someone may send a lot of unnecessary gas, so they could end up paying a lot.
My opinion is that it is best to handle this on the front-end.
Edit
If you are trying to take into account the gasPrice, you can use tx.gasprice. See here for more information.
answered 4 hours ago
shaneshane
2,4524832
3
Psst,msg.gashas been removed and replaced bygasleftas per solidity.readthedocs.io/en/latest/…
– Lauri Peltonen
4 hours ago
Ahh yes. Thank you.
– shane
4 hours ago
Ah that makes sense. If I made a require to check the msg.value >= 10% of tx.gasprice, would that work? Would there be discrepancies between generating the web3 function call price + value and the contract value?
– Jaren L
1 hour ago
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Yes, you can let the charge be a function of the gas of the transaction. You would do something like this:
uint256 charge = gasleft() / 10;
This is sensitive and you should know that gasleft() returns the amount of gas available at that point in the execution. Therefore, if you call gasleft() at the beginning of a function, the number will be higher than at the end of the function.
Additionally, someone may send a lot of unnecessary gas, so they could end up paying a lot.
My opinion is that it is best to handle this on the front-end.
Edit
If you are trying to take into account the gasPrice, you can use tx.gasprice. See here for more information.
answered 4 hours ago
shaneshane
2,4524832
3
Psst,msg.gashas been removed and replaced bygasleftas per solidity.readthedocs.io/en/latest/…
– Lauri Peltonen
4 hours ago
Ahh yes. Thank you.
– shane
4 hours ago
Ah that makes sense. If I made a require to check the msg.value >= 10% of tx.gasprice, would that work? Would there be discrepancies between generating the web3 function call price + value and the contract value?
– Jaren L
1 hour ago
add a comment |
Yes, you can let the charge be a function of the gas of the transaction. You would do something like this:
uint256 charge = gasleft() / 10;
This is sensitive and you should know that gasleft() returns the amount of gas available at that point in the execution. Therefore, if you call gasleft() at the beginning of a function, the number will be higher than at the end of the function.
Additionally, someone may send a lot of unnecessary gas, so they could end up paying a lot.
My opinion is that it is best to handle this on the front-end.
Edit
If you are trying to take into account the gasPrice, you can use tx.gasprice. See here for more information.
answered 4 hours ago
shaneshane
2,4524832
3
Psst,msg.gashas been removed and replaced bygasleftas per solidity.readthedocs.io/en/latest/…
– Lauri Peltonen
4 hours ago
Ahh yes. Thank you.
– shane
4 hours ago
Ah that makes sense. If I made a require to check the msg.value >= 10% of tx.gasprice, would that work? Would there be discrepancies between generating the web3 function call price + value and the contract value?
– Jaren L
1 hour ago
add a comment |
Yes, you can let the charge be a function of the gas of the transaction. You would do something like this:
uint256 charge = gasleft() / 10;
This is sensitive and you should know that gasleft() returns the amount of gas available at that point in the execution. Therefore, if you call gasleft() at the beginning of a function, the number will be higher than at the end of the function.
Additionally, someone may send a lot of unnecessary gas, so they could end up paying a lot.
My opinion is that it is best to handle this on the front-end.
Edit
If you are trying to take into account the gasPrice, you can use tx.gasprice. See here for more information.
answered 4 hours ago
shaneshane
2,4524832
Yes, you can let the charge be a function of the gas of the transaction. You would do something like this:
uint256 charge = gasleft() / 10;
This is sensitive and you should know that gasleft() returns the amount of gas available at that point in the execution. Therefore, if you call gasleft() at the beginning of a function, the number will be higher than at the end of the function.
Additionally, someone may send a lot of unnecessary gas, so they could end up paying a lot.
My opinion is that it is best to handle this on the front-end.
Edit
If you are trying to take into account the gasPrice, you can use tx.gasprice. See here for more information.
answered 4 hours ago
shaneshane
2,4524832
edited 4 hours ago
answered 4 hours ago
shaneshane
2,4524832
answered 4 hours ago
shaneshane
2,4524832
answered 4 hours ago
shaneshane
2,4524832
2,4524832
3
Psst,msg.gashas been removed and replaced bygasleftas per solidity.readthedocs.io/en/latest/…
– Lauri Peltonen
4 hours ago
Ahh yes. Thank you.
– shane
4 hours ago
Ah that makes sense. If I made a require to check the msg.value >= 10% of tx.gasprice, would that work? Would there be discrepancies between generating the web3 function call price + value and the contract value?
– Jaren L
1 hour ago
add a comment |
3
Psst,msg.gashas been removed and replaced bygasleftas per solidity.readthedocs.io/en/latest/…
– Lauri Peltonen
4 hours ago
Ahh yes. Thank you.
– shane
4 hours ago
Ah that makes sense. If I made a require to check the msg.value >= 10% of tx.gasprice, would that work? Would there be discrepancies between generating the web3 function call price + value and the contract value?
– Jaren L
1 hour ago
3
3
Psst,
msg.gas has been removed and replaced by gasleft as per solidity.readthedocs.io/en/latest/…– Lauri Peltonen
4 hours ago
Psst,
msg.gas has been removed and replaced by gasleft as per solidity.readthedocs.io/en/latest/…– Lauri Peltonen
4 hours ago
Ahh yes. Thank you.
– shane
4 hours ago
Ahh yes. Thank you.
– shane
4 hours ago
Ah that makes sense. If I made a require to check the msg.value >= 10% of tx.gasprice, would that work? Would there be discrepancies between generating the web3 function call price + value and the contract value?
– Jaren L
1 hour ago
Ah that makes sense. If I made a require to check the msg.value >= 10% of tx.gasprice, would that work? Would there be discrepancies between generating the web3 function call price + value and the contract value?
– Jaren L
1 hour ago
add a comment |
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