Achala Dissanayake
  • Member for 4 years, 5 months
  • Last seen this week
  • Kottawa, Pannipitiya, Western Province, Sri Lanka
1 answers
137 votes
52k views
65 bookmarks
What is Swarm and what is it used for?
8 answers
74 votes
74k views
27 bookmarks
How can I check if an Ethereum address is valid?
7 answers
60 votes
13k views
17 bookmarks
How can I verify that a contract on the blockchain matches the source code?
3 answers
52 votes
36k views
18 bookmarks
What is an Event?
4 answers
47 votes
24k views
12 bookmarks
What is the zero, empty or null value of a struct?
3 answers
39 votes
18k views
40 bookmarks
How to write an optimized (gas-cost) smart contract?
3 answers
32 votes
13k views
25 bookmarks
Ethereum Merkle Tree Explanation
3 answers
27 votes
10k views
6 bookmarks
Are there any public/free nodes to connect a Dapp front end?
1 answers
18 votes
14k views
4 bookmarks
What is the receive keyword in solidity?
2 answers
18 votes
25k views
17 bookmarks
how to estimate gas cost?
1 answers
17 votes
11k views
4 bookmarks
Member function "transfer" not found or not visible after argument-dependent lookup in contract?
5 answers
15 votes
8k views
4 bookmarks
Using web3 to sign a transaction without connecting to geth
3 answers
15 votes
28k views
15 bookmarks
How to properly create a raw transaction and sign it using web3 in browser
3 answers
13 votes
5k views
7 bookmarks
Accepting an ERC20 Token as Payment
2 answers
12 votes
7k views
2 bookmarks
Solidity functions - private visibility
4 answers
10 votes
21k views
7 bookmarks
How to transfer ERC20 tokens using web3js
3 answers
8 votes
925 views
5 bookmarks
Best Resource for Intense Solidity Coding (In May 2018)
2 answers
6 votes
2k views
2 bookmarks
How do I serialize an array of strings in Solidity?
1 answers
6 votes
476 views
1 bookmarks
what is the difference between non-executable transactions and executable transactions?
3 answers
6 votes
6k views
2 bookmarks
Default value of a struct
1 answers
6 votes
449 views
1 bookmarks
How can I use the mathematical constant e in Solidity?
2 answers
5 votes
1k views
2 bookmarks
Is there any project to calculate different hashes like md5, sha1 etc. in solidity?
1 answers
5 votes
5k views
3 bookmarks
How can I verify ownership to allow resale of NFTs?
1 answers
4 votes
799 views
2 bookmarks
How to call two functions in atomic transaction from web3 node client
1 answers
4 votes
124 views
3 bookmarks
How does this contract scam work?
1 answers
3 votes
2k views
1 bookmarks
Understanding Solidity libraries
3 answers
3 votes
739 views
1 bookmarks
Choosing between Javascript and Solidity for testing smart contracts
2 answers
3 votes
816 views
1 bookmarks
Truffle in production it´s recommended
1 answers
3 votes
107 views
3 bookmarks
Ethereum Merkle Patricia Tree Riddle
3 answers
3 votes
2k views
3 bookmarks
How much does it cost to store each IPFS hash in Ethereum blockchain