sckorbin about 1 year ago

Interacting with contracts without spending gas

Is it possible not to spend gas while interacting with smart-contracts?

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falloutboy about 1 year ago

Are there any optimizations for creating structs in Solidity?

I have seen in some course that while creating `struct`'s in solidity one can use optimizations to minimize required storage space in Solidity. Is ... more

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mclovin about 1 year ago

How to track contract events in frontend?

I am trying to call a contract’s function by its instance in web3.js^1.0.0 using asynchronous function but I am getting an “undefined” rather than ... more

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robertoschler about 1 year ago

Is using the bytes() function the proper way to check for empty data or field elements in Solidity?

I'm working through another Ethereum tutorial while I wait for Cryptozombies lesson 6. In it, the author uses "bytes().length != 0" to check for "... more

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v.munozre about 1 year ago

How store ETH in a smart contract?

The question it's How store Ether in a smart contract. In first step, I try transfer the transaction value to the smartcontract address doing some... more

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vieira.lucasmm about 1 year ago

When is EthAcademy launch new lessons?

EthAcademy seems to be a very promissing place to learn solidity, but there isn't any lessons there D: Does anyone know when new lessons will be av... more

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crzndx about 1 year ago

Is there an open source alternative to run your own Oraclize-like oracle?

Is there some open source project to run an Oracle on your own? If not, what are the mechanisms you would need to run an oracle service? more

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charles about 1 year ago

What are the best sources for learning solidity?

Looking for a good basic course/video/overview, my goal is to build an ethereum Dapp myself.

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alexeev.sergey.a about 1 year ago

How does this honeypot work?

I found the discussion about the honeypot contract: https://www.reddit.com/r/ethereum/comments/85ubpd/1_or_more_eth_bounty_for_addresses_0x000x09/ ... more

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matsolidity about 1 year ago

replace variable reference type "var" in a function

Hi there ! I know "var" type has been deprecated in solidity but I use it as a reference, eg : contract A { struct Name { string fi... more

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