Recent questions tagged blockchain

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1 answer

How do I send ether from an EOA to a smart contract?

Sep 27, 2018 in Blockchain by slayer
 • 29,370 points • 1,637 views
+1 vote
1 answer

Deploy contract using solcjs

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 1,078 views
+1 vote
1 answer

Calling deployed smart contract from node.js

Sep 26, 2018 in Blockchain by slayer
 • 29,370 points • 4,096 views
+1 vote
1 answer

Solidity: Sending ERC20 Tokens

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 1,585 views
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1 answer

Solidity: How can I return a list of user-defined function?

Sep 26, 2018 in Blockchain by slayer
 • 29,370 points • 1,415 views
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1 answer

How can I get the same return value as solidity `abi.encodePacked` in Golang?

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 4,307 views
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1 answer

How connect library to smart contract from external resources?

Sep 26, 2018 in Blockchain by slayer
 • 29,370 points • 628 views
0 votes
1 answer

Is it possible to send eth to a contract through its constructor from another contract?

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 1,753 views
0 votes
1 answer

Testrpc Error: listen EADDRINUSE :::8545 on Mac

Sep 26, 2018 in Blockchain by slayer
 • 29,370 points • 991 views
0 votes
1 answer

Nethereum C# Unit Test GetTransactionCount

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 1,420 views
0 votes
1 answer

Error using EtherJS: this.provider.getTransactionCount is not a function

Sep 26, 2018 in Blockchain by slayer
 • 29,370 points • 2,606 views
+5 votes
1 answer

What are the programming languages I should know to become a Blockchain Developer?

Sep 25, 2018 in Blockchain by slayer
 • 29,370 points • 961 views
0 votes
2 answers

Warning: Using contract member “balance” inherited from the address type is deprecated. Solidity

Sep 25, 2018 in Blockchain by digger
 • 26,740 points • 1,223 views
0 votes
3 answers

String conversion to Array in Solidity

Sep 25, 2018 in Blockchain by slayer
 • 29,370 points • 3,320 views
0 votes
1 answer

Cannot access web3 object with typescript and ethereum

Sep 25, 2018 in Blockchain by digger
 • 26,740 points • 2,935 views
0 votes
1 answer

Poloniex C# API - get trades

Sep 25, 2018 in Blockchain by slayer
 • 29,370 points • 1,537 views
0 votes
1 answer

How to set token price in solidity?

Sep 25, 2018 in Blockchain by digger
 • 26,740 points • 8,847 views
0 votes
1 answer

Ethereum call contract method that emits an event, from another contract

Sep 25, 2018 in Blockchain by slayer
 • 29,370 points • 2,268 views
0 votes
1 answer

eth.getTransactionReceipt returns null

Sep 25, 2018 in Blockchain by digger
 • 26,740 points • 2,172 views
0 votes
1 answer

Call contract methods with web3 from newly created account

Sep 25, 2018 in Blockchain by slayer
 • 29,370 points • 6,328 views
0 votes
1 answer

Not able send ether to my smart contract's address

Sep 25, 2018 in Blockchain by digger
 • 26,740 points • 1,623 views
0 votes
1 answer

Why Gas Used By Txn is different when invoking the same function in the same smart contract？

Sep 25, 2018 in Blockchain by sabby
 • 4,370 points • 1,047 views
0 votes
1 answer

How to detect if an ethereum address is an ERC20 token contract?

Sep 25, 2018 in Blockchain by sabby
 • 4,370 points • 7,464 views
+2 votes
1 answer

Composer playground - issue on RHEL

Sep 24, 2018 in Blockchain by Renu353
 • 190 points • 1,277 views
0 votes
1 answer

Getting the length of public array variable (getter)

Sep 24, 2018 in Blockchain by slayer
 • 29,370 points • 1,458 views
0 votes
4 answers

Unable to run truffle@2.1.2 migrate --network live. “Exceeds block gas limit”

Sep 24, 2018 in Blockchain by digger
 • 26,740 points • 1,824 views
0 votes
1 answer

ethminer failed to submit hashrate

Sep 24, 2018 in Blockchain by slayer
 • 29,370 points • 900 views
0 votes
1 answer

How to manually create the instance of the contract in truffle?

Sep 24, 2018 in Blockchain by digger
 • 26,740 points • 2,797 views
0 votes
1 answer

Repeating transactions hangs - web3js, local geth

Sep 24, 2018 in Blockchain by slayer
 • 29,370 points • 1,075 views
0 votes
2 answers

Is it possible to modify a variable value from another contract?

Sep 24, 2018 in Blockchain by digger
 • 26,740 points • 4,416 views
+1 vote
3 answers

What is the pattern for handling throw on a Solidity contract in tests

Sep 24, 2018 in Blockchain by slayer
 • 29,370 points • 1,887 views
0 votes
3 answers

UnhandledPromiseRejectionWarning: Error: The contract code couldn't be stored, please check your gas limit

Sep 24, 2018 in Blockchain by digger
 • 26,740 points • 1,720 views
0 votes
2 answers

Truffle migrate Error after run testrpc

Sep 24, 2018 in Blockchain by slayer
 • 29,370 points • 860 views
0 votes
1 answer

Not able to send Ethereum transaction

Sep 24, 2018 in Blockchain by digger
 • 26,740 points • 745 views
+3 votes
1 answer

What is the difference between online and offline hyperledger composer?

Sep 21, 2018 in Blockchain by Renu353
 • 190 points • 948 views
0 votes
1 answer

Can't send transaction even if I use an example from official Ethereum webpage

Sep 21, 2018 in Blockchain by digger
 • 26,740 points • 1,267 views
0 votes
1 answer

Historical ethereum prices - Coinbase API

Sep 21, 2018 in Blockchain by slayer
 • 29,370 points • 1,899 views
0 votes
1 answer

Test ethereum Event Logs with truffle

Sep 21, 2018 in Blockchain by digger
 • 26,740 points • 1,985 views
0 votes
1 answer

Are there null like thing in solidity

Sep 21, 2018 in Blockchain by slayer
 • 29,370 points • 2,098 views
0 votes
1 answer

String concatenation in solidity?

Sep 21, 2018 in Blockchain by digger
 • 26,740 points • 3,393 views
0 votes
1 answer

What do I import for SHA encryption in Node.js?

Sep 21, 2018 in Blockchain by slayer
 • 29,370 points • 937 views
0 votes
1 answer

how loop through a JSON Array of bitcoin transaction data

Sep 21, 2018 in Blockchain by digger
 • 26,740 points • 764 views
0 votes
1 answer

Syntax Error running on Python

Sep 21, 2018 in Blockchain by slayer
 • 29,370 points • 548 views
0 votes
1 answer

Why do people prefer mining Litecoin over Bitcoin?

Sep 21, 2018 in Blockchain by digger
 • 26,740 points • 755 views
0 votes
1 answer

How to Query hdfs with Spark Sql

Sep 20, 2018 in Blockchain by digger
 • 26,740 points • 2,163 views
0 votes
1 answer

How to send JSON object from npm module to browser

Sep 20, 2018 in Blockchain by slayer
 • 29,370 points • 678 views
0 votes
1 answer

Blockchain ToBTC API not returning Php variable

Sep 20, 2018 in Blockchain by slayer
 • 29,370 points • 632 views
0 votes
1 answer

XMLHttpRequest is not defined while sending request to blockchain service via C#

Sep 20, 2018 in Blockchain by digger
 • 26,740 points • 1,238 views
+2 votes
1 answer

Has Blockchain made illegal activities easier?

Sep 20, 2018 in Blockchain by slayer
 • 29,370 points • 478 views
+2 votes
1 answer

What is Bitcoin Powered Electrical Outlet?

Sep 20, 2018 in Blockchain by digger
 • 26,740 points • 770 views
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