Recent questions tagged blockchain

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1 answer

Sending hash in function parameter

Oct 8, 2018 in Blockchain by digger
 • 26,740 points • 895 views
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1 answer

How can I deploy a hyperledger business network using docker-compose?

Oct 4, 2018 in Blockchain by sabby
 • 4,370 points • 1,524 views
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1 answer

How to define the path to hyperledger-fabric chaincode?

Oct 4, 2018 in Blockchain by sabby
 • 4,370 points • 1,468 views
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Contract deployment is raising gas issue while transaction and issue vary on various networksbl

Oct 3, 2018 in Blockchain by digger
 • 26,740 points • 796 views
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Error when Installing Ethereum: Package 'ethereum' has no installation candidate

Oct 3, 2018 in Blockchain by slayer
 • 29,370 points • 904 views
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1 answer

Web is not injected by metamask

Oct 3, 2018 in Blockchain by digger
 • 26,740 points • 989 views
0 votes
1 answer

Truffle migrate fails due to missing function, but it exists in node_modules

Oct 3, 2018 in Blockchain by slayer
 • 29,370 points • 2,086 views
0 votes
1 answer

Access variables through auto-generated getters from a different contract

Oct 3, 2018 in Blockchain by digger
 • 26,740 points • 555 views
0 votes
1 answer

Handling UI when a trasaction is in pending (MetaMask)

Oct 3, 2018 in Blockchain by slayer
 • 29,370 points • 1,052 views
0 votes
1 answer

Error when trying to deploy Ethereum smart contract using web3j

Oct 3, 2018 in Blockchain by digger
 • 26,740 points • 1,644 views
0 votes
1 answer

What happens to Ether in a smart contract after selfdestruct?

Oct 3, 2018 in Blockchain by slayer
 • 29,370 points • 1,169 views
0 votes
1 answer

Truffle migration error (test rpc is running)

Oct 3, 2018 in Blockchain by digger
 • 26,740 points • 799 views
0 votes
1 answer

How do display all the events logs from a smart contract?

Oct 3, 2018 in Blockchain by slayer
 • 29,370 points • 3,289 views
0 votes
1 answer

How do I initialize an array in a struct

Oct 1, 2018 in Blockchain by sabby
 • 4,370 points • 3,111 views
0 votes
1 answer

Cannot find package “google/protobuf”

Oct 1, 2018 in Blockchain by sabby
 • 4,370 points • 3,570 views
0 votes
2 answers

Modifiers in solidity

Oct 1, 2018 in Blockchain by digger
 • 26,740 points • 2,177 views
0 votes
1 answer

How to make Observable from callback?

Oct 1, 2018 in Blockchain by slayer
 • 29,370 points • 2,685 views
0 votes
1 answer

How to fix browser/IERC20.sol:4:53: Warning: This declaration shadows an existing declaration

Oct 1, 2018 in Blockchain by digger
 • 26,740 points • 1,503 views
0 votes
1 answer

Why is (startingBalance - endBalance) > (gasUsed * gasPrice) for an Ethereum transaction?

Oct 1, 2018 in Blockchain by slayer
 • 29,370 points • 918 views
0 votes
1 answer

Web3j: Writing operations on a contract always throw “java.lang.ArrayIndexOutOfBoundsException”

Oct 1, 2018 in Blockchain by digger
 • 26,740 points • 703 views
0 votes
1 answer

Send all Tokens and Eth to a Address automatically

Oct 1, 2018 in Blockchain by slayer
 • 29,370 points • 4,384 views
0 votes
1 answer

Ethereum client-go RPC response 403 “invalid host specified”

Oct 1, 2018 in Blockchain by digger
 • 26,740 points • 2,062 views
0 votes
1 answer

How to call function in one contract from another contract in private blockchain?

Oct 1, 2018 in Blockchain by slayer
 • 29,370 points • 921 views
0 votes
1 answer

web3.eth.sendSignedTransaction() always return “Returned error: nonce too low”

Oct 1, 2018 in Blockchain by digger
 • 26,740 points • 6,184 views
0 votes
1 answer

Solidity mocha : address is not a contract error

Oct 1, 2018 in Blockchain by slayer
 • 29,370 points • 1,188 views
0 votes
1 answer

Add Peers does not add a peer in Geth console

Sep 28, 2018 in Blockchain by digger
 • 26,740 points • 2,951 views
0 votes
1 answer

Invalid method parameters for eth_sendTransaction

Sep 28, 2018 in Blockchain by slayer
 • 29,370 points • 1,975 views
0 votes
1 answer

NodeJS POST Request Over JSON-RPC

Sep 28, 2018 in Blockchain by slayer
 • 29,370 points • 2,430 views
0 votes
1 answer

How to run Meteor insert within a Fiber?

Sep 28, 2018 in Blockchain by digger
 • 26,740 points • 854 views
0 votes
1 answer

How to get value from solidity contract using java?

Sep 28, 2018 in Blockchain by digger
 • 26,740 points • 2,118 views
0 votes
1 answer

Etheruem: Pyethereum Error

Sep 28, 2018 in Blockchain by slayer
 • 29,370 points • 516 views
0 votes
1 answer

Uncaught ReferenceError: web3 is not defined at window.onload

Sep 28, 2018 in Blockchain by digger
 • 26,740 points • 2,458 views
0 votes
1 answer

How are the ethers sent to smart contract in the IBM example?

Sep 28, 2018 in Blockchain by slayer
 • 29,370 points • 636 views
0 votes
1 answer

Can't call contract function in truffle console

Sep 28, 2018 in Blockchain by digger
 • 26,740 points • 3,174 views
0 votes
1 answer

Why estimateGas always returns null or zero?

Sep 28, 2018 in Blockchain by slayer
 • 29,370 points • 1,350 views
0 votes
1 answer

ethereum eth_sendTransaction via PHP curl

Sep 27, 2018 in Blockchain by digger
 • 26,740 points • 5,068 views
+1 vote
3 answers

Pass parameter as bytes32 to Solidity Smart Contract

Sep 27, 2018 in Blockchain by slayer
 • 29,370 points • 9,903 views
0 votes
1 answer

How to achieve simple OOP in Solidity?

Sep 27, 2018 in Blockchain by digger
 • 26,740 points • 953 views
0 votes
1 answer

Truffle init: throw er; // Unhandled 'error' event

Sep 27, 2018 in Blockchain by slayer
 • 29,370 points • 2,608 views
0 votes
1 answer

NPM cannot install “truffle” on Windows

Sep 27, 2018 in Blockchain by digger
 • 26,740 points • 4,197 views
0 votes
3 answers

python ethereum (pyethapp): Failed building wheel for scrypt.

Sep 27, 2018 in Blockchain by slayer
 • 29,370 points • 1,752 views
0 votes
1 answer

Can't install pyethereum module

Sep 27, 2018 in Blockchain by digger
 • 26,740 points • 1,090 views
0 votes
1 answer

How do I compile a piece of Solidity Code using eris' javascript?

Sep 27, 2018 in Blockchain by slayer
 • 29,370 points • 930 views
0 votes
1 answer

Getting error during “truffle migrate” for an ethereum contract on testrpc

Sep 27, 2018 in Blockchain by digger
 • 26,740 points • 667 views
0 votes
1 answer

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

Sep 27, 2018 in Blockchain by slayer
 • 29,370 points • 1,681 views
+1 vote
1 answer

Deploy contract using solcjs

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 1,105 views
+1 vote
1 answer

Calling deployed smart contract from node.js

Sep 26, 2018 in Blockchain by slayer
 • 29,370 points • 4,141 views
+1 vote
1 answer

Solidity: Sending ERC20 Tokens

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 1,602 views
0 votes
1 answer

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

Sep 26, 2018 in Blockchain by slayer
 • 29,370 points • 1,440 views
0 votes
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 • 4,355 views
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