Linked Questions

2
votes
1answer
284 views

Possible to use gas from the balance of a contract?

When calling an external contract function from within a contract, does the gas come from the originating transaction? If so, is there a way to use gas from the contract's balance? example call: ...
2
votes
1answer
906 views

Can transaction fee be paid by 3rd account? [duplicate]

I have a scenario like that: I have a "Main" account with ethereum client: And there are other two accounts, lets call them: "A" and "B" "A" account will send to "B" account some token (ecr20 token)...
23
votes
5answers
16k views

Paying a transaction fee with an ERC20 token

As far as I understand, one of the ERC20 token's features is that you can pay a transaction fee with it. In other words, you can send them without having Ether. I transferred REP tokens to the ...
2
votes
0answers
476 views

What is the simplest way to allow a contract to pay for gas?

EIP86 and abstraction discussion is exciting for the future, but what are the things we could change first, to allow a contract to pay for gas? For example, for the withdraw transactions on BabyZoE, ...
3
votes
0answers
217 views

How to send custom tokens without ether? [duplicate]

I would like my customers to send a custom token without thinking of a certain amount of ether for gas. So I've tried the standard-token at ethereum.org. There's a way described to auto refill the ...
3
votes
1answer
78 views

Is there any case where a contract will use gas?

I was wondering, why and when is it important to fund your contract with ether? Is this really only ever if you want to send ether from your contract? Does a contract ever need to pay gas for ...
2
votes
0answers
58 views

Can a contract pay its own fees? [duplicate]

so I've been working on ethereum for the past few weeks, mainly deploying and interacting with contracts but something i noticed is the high gas usage of using the tokens over time, so i was wondering ...
1
vote
0answers
23 views

Can contract use its own ethers as a gas when calling other contract? [duplicate]

Can rich contract (that holds some ethers) use them as a gas when it would like to call other contract? http://solidity.readthedocs.io/en/latest/control-structures.html gives an example of feed.info....
3
votes
1answer
94 views

Can I buy the gas within the contract code? [duplicate]

The contract contains ether. Can I buy the gas within the contract code?
7
votes
2answers
4k views

How to manipulate data in a Solidity smart contract?

I have a smart contract with some members which should get modified on certain events. For simplicity, let's imagine we have a greeter contract. If I call greeter.greet() in the JavaScript console, ...

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