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Achala Dissanayake
  • Member for 4 years, 11 months
  • Last seen this week
  • Kottawa, Pannipitiya, Western Province, Sri Lanka
139 votes
1 answer
52k views

What is Swarm and what is it used for?

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80 votes
9 answers
85k views

How can I check if an Ethereum address is valid?

  • 2,495
60 votes
7 answers
15k views

How can I verify that a contract on the blockchain matches the source code?

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52 votes
3 answers
37k views

What is an Event?

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49 votes
4 answers
25k views

What is the zero, empty or null value of a struct?

41 votes
3 answers
20k views

How to write an optimized (gas-cost) smart contract?

  • 1,947
33 votes
3 answers
14k views

Ethereum Merkle Tree Explanation

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27 votes
3 answers
10k views

Are there any public/free nodes to connect a Dapp front end?

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25 votes
1 answer
21k views

What is the receive keyword in solidity?

19 votes
2 answers
27k views

how to estimate gas cost?

  • 319
18 votes
4 answers
31k views

How to properly create a raw transaction and sign it using web3 in browser

17 votes
1 answer
12k views

Member function "transfer" not found or not visible after argument-dependent lookup in contract?

16 votes
5 answers
9k views

Using web3 to sign a transaction without connecting to geth

  • 171
14 votes
3 answers
5k views

Accepting an ERC20 Token as Payment

  • 153
12 votes
2 answers
7k views

Solidity functions - private visibility

10 votes
3 answers
953 views

Best Resource for Intense Solidity Coding (In May 2018)

10 votes
4 answers
25k views

How to transfer ERC20 tokens using web3js

  • 101
6 votes
2 answers
2k views

How do I serialize an array of strings in Solidity?

  • 195
6 votes
1 answer
583 views

what is the difference between non-executable transactions and executable transactions?

  • 951
6 votes
3 answers
7k views

Default value of a struct

6 votes
1 answer
642 views

How can I use the mathematical constant e in Solidity?

5 votes
2 answers
1k views

Is there any project to calculate different hashes like md5, sha1 etc. in solidity?

  • 1,077
5 votes
1 answer
6k views

How can I verify ownership to allow resale of NFTs?

4 votes
4 answers
875 views

Choosing between Javascript and Solidity for testing smart contracts

  • 356
4 votes
1 answer
897 views

How to call two functions in atomic transaction from web3 node client

  • 43
4 votes
1 answer
225 views

How does this contract scam work?

  • 43
3 votes
1 answer
4k views

Solidity multiple vs single require

  • 145
3 votes
2 answers
873 views

Truffle in production it´s recommended [closed]

3 votes
1 answer
227 views

Ethereum Merkle Patricia Tree Riddle

  • 31
3 votes
1 answer
2k views

Understanding Solidity libraries