Trending questions in Blockchain

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"Migrations" -- Returned error: authentication needed: password or unlock.

By default, the accounts are locked and ...READ MORE

Jan 17 in Blockchain by Omkar
• 67,620 points
784 views
0 votes
1 answer

How many peers in fabric network need to endorse a transaction?

The number of peers required to endorse ...READ MORE

Jan 30 in Blockchain by Omkar
• 67,620 points
218 views
0 votes
1 answer

Solidity: casting address to address payable

I don’t see why direct casting isn’t ...READ MORE

Jan 23 in Blockchain by Omkar
• 67,620 points
518 views
–1 vote
2 answers

Truffle migrate shows Error: Cannot find module 'truffle-expect'

You can also install the basic truffle-expect ...READ MORE

Feb 19 in Blockchain by Rohit
41 views
0 votes
1 answer

Not able to install truffle

This error occurs when there are permission ...READ MORE

Jan 29 in Blockchain by Omkar
• 67,620 points
199 views
0 votes
1 answer

Truffle "Migrations" ran out of gas error

This error is caused because the amount ...READ MORE

Jan 17 in Blockchain by Omkar
• 67,620 points
716 views
0 votes
1 answer

"Migrations" exceeded the block limit (with a gas value you set).

In the error you have posted, in ...READ MORE

Jan 17 in Blockchain by Omkar
• 67,620 points
708 views
0 votes
1 answer

Does a hyperledger fabric application client need to connect to all peers?

No, it is not necessary to connect ...READ MORE

Jan 30 in Blockchain by Omkar
• 67,620 points
130 views
–1 vote
1 answer

Miner in Ethereum Private network is hanging

Looking at your commands again, I figured ...READ MORE

Jan 17 in Blockchain by Omkar
• 67,620 points
703 views
0 votes
1 answer

Not able to install truffle-contract

There’s a permission error. Run this command ...READ MORE

Jan 23 in Blockchain by Omkar
• 67,620 points
370 views
0 votes
1 answer

program can't start because cudart64_70.dll is missing

You might have missed out installing the ...READ MORE

Jan 29 in Blockchain by Omkar
• 67,620 points
108 views
0 votes
1 answer

Not able to connect nodes on Ethereum Private Network using bootnodes.

If you have created the private network ...READ MORE

Jan 27 in Blockchain by Omkar
• 67,620 points
184 views
0 votes
1 answer

Truffle does not open console, instead opens truffle.js file

When running truffle commands on Windows system, ...READ MORE

Jan 29 in Blockchain by Omkar
• 67,620 points
75 views
0 votes
1 answer

Truffle deployer is not working

If you have deployed it before, then ...READ MORE

Jan 29 in Blockchain by Omkar
• 67,620 points
66 views
+1 vote
2 answers

Hyperledger fabric: Error: got unexpected status: FORBIDDEN -- Failed to reach implicit threshold of 1 sub-policies

Try  ./byfn.sh -m down and then ./byfn.sh -m up READ MORE

Nov 5, 2018 in Blockchain by Omkar
• 67,620 points
2,027 views
0 votes
1 answer

Cannot read property 'getBlock' of undefined

getBlock is used by web3 and to use it, ...READ MORE

Jan 29 in Blockchain by Omkar
• 67,620 points
50 views
0 votes
1 answer

geth attach command showing error: bind: address already in use

Seems like there is already a geth instance ...READ MORE

Jan 16 in Blockchain by Omkar
• 67,620 points
601 views
0 votes
1 answer

Private ethereum network account balance is zero

There are two reasons due to which ...READ MORE

Jan 28 in Blockchain by Omkar
• 67,620 points
56 views
0 votes
1 answer

Truffle can not find artifacts error

To deploy any project/ smart contract, you ...READ MORE

Jan 23 in Blockchain by Omkar
• 67,620 points
250 views
0 votes
1 answer

'env' is not recognized as an internal or external command

According to the error, it seems like ...READ MORE

Jan 23 in Blockchain by Omkar
• 67,620 points
250 views
0 votes
1 answer

Geth console can’t access smart contract

You are running commands using an object ...READ MORE

Jan 27 in Blockchain by Omkar
• 67,620 points
67 views
0 votes
1 answer

How to call a payable contract function from truffle console?

You can use a contract function, on ...READ MORE

Jan 24 in Blockchain by Omkar
• 67,620 points
185 views
0 votes
1 answer

Truffle compile compilation failed

This is a version compatibility problem. In ...READ MORE

Jan 17 in Blockchain by Omkar
• 67,620 points
485 views
0 votes
1 answer

Variable declaration problem in truffle console.

The reason it says “undefined” is because ...READ MORE

Jan 27 in Blockchain by Omkar
• 67,620 points
53 views
0 votes
1 answer

Ethereum transaction not getting Updated

You have done everything right except for ...READ MORE

Jan 27 in Blockchain by Omkar
• 67,620 points
37 views
0 votes
1 answer

How to create custom accounts in testrpc?

Yes, you can use testrpc to do ...READ MORE

Jan 27 in Blockchain by Omkar
• 67,620 points
34 views
0 votes
1 answer

Error while sending an address to functions

In solidity 0.5.0 (and above) there are ...READ MORE

Jan 23 in Blockchain by Omkar
• 67,620 points
163 views
0 votes
1 answer

Calling Truffle Commands through a script

Seems like its due to async behavior ...READ MORE

Jan 24 in Blockchain by Omkar
• 67,620 points
112 views
–1 vote
1 answer

Problem adding peers to Ethereum private network

Seems like you have not created the ...READ MORE

Jan 22 in Blockchain by Omkar
• 67,620 points
218 views
0 votes
1 answer

How to run a Javascript in truffle console?

There are two ways to do this. You ...READ MORE

Jan 24 in Blockchain by Omkar
• 67,620 points
72 views
–1 vote
1 answer

Not able to install truffle

I know this is very frustrating, I ...READ MORE

Jan 17 in Blockchain by Omkar
• 67,620 points
411 views
0 votes
1 answer

Solidity Error: Exceeds block gas limit

Remove the line norpc:true and change the ...READ MORE

Jan 23 in Blockchain by Omkar
• 67,620 points
100 views
0 votes
1 answer

Truffle dev says my function is not a function

It seems you are using truffle v5. ...READ MORE

Jan 24 in Blockchain by Omkar
• 67,620 points
42 views
0 votes
1 answer

Not able to use ERC721 token in my project

Like this error indicates, you have to ...READ MORE

Jan 23 in Blockchain by Omkar
• 67,620 points
67 views
0 votes
1 answer

How can I call a contract from another contract?

There are two ways to solve this. ...READ MORE

Jan 23 in Blockchain by Omkar
• 67,620 points
55 views
0 votes
1 answer

Unexpected error: Cannot provision contracts while instantiating the console

This is a common problem with truffle ...READ MORE

Jan 23 in Blockchain by Omkar
• 67,620 points
51 views
0 votes
1 answer

truffle migrate Error: “Cannot find module 'truffle-expect'”

Seems like you are missing some modules ...READ MORE

Jan 23 in Blockchain by Omkar
• 67,620 points
48 views
0 votes
0 answers

WA: With the wings of the technology, constantly broadening the field of development

According to the history, in the Internet ...READ MORE

Jan 24 in Blockchain by anonymous

recategorized Jan 24 by Vardhan 37 views
0 votes
0 answers

How does Atox debut in the center of cross-border payment industry?

Introduction: The “global village” created by the ...READ MORE

Jan 24 in Blockchain by anonymous

recategorized Jan 24 by Vardhan 31 views
0 votes
1 answer

Problem monitoring geth instance

Try the following command: geth monitor --attach ./chain-data/geth.ipc ...READ MORE

Jan 22 in Blockchain by Omkar
• 67,620 points
36 views
0 votes
0 answers

AXC: Conform to the trend of the times and to be a pioneer in the development of the industry

On January 2, 2019, Ali Baba DAMO ...READ MORE

Jan 23 in Blockchain by anonymous

retagged Jan 23 by Vardhan 47 views
–1 vote
1 answer

Not able to use geth attach

You are getting this error because you ...READ MORE

Jan 17 in Blockchain by Omkar
• 67,620 points
271 views
–1 vote
1 answer

Not able to create new account in geth for private ethereum blockchain

personal.newAccount() is not a default geth method. This ...READ MORE

Jan 17 in Blockchain by Omkar
• 67,620 points
260 views
+1 vote
3 answers

How to convert timestamp to readable format in blockchain.info?

You are talking about the block_time property ...READ MORE

Apr 29 in Blockchain by Raghu
840 views
0 votes
4 answers

How to solve “bind: cannot assign requested address” Error?

You must mention in your host.conf file ...READ MORE

Jul 31, 2018 in Blockchain by slayer
• 29,170 points
1,415 views
0 votes
2 answers

Using Hyperledger composer with Hyperledger Blockchain explorer.

I was facing the same issue and ...READ MORE

Aug 9, 2018 in Blockchain by digger
• 26,550 points
1,535 views
0 votes
1 answer

How to check ethereum logs?

Hey there! You don't have a Verbose ...READ MORE

Jan 9 in Blockchain by Omkar
• 67,620 points
538 views
0 votes
0 answers

AtoX leads blockchain 4.0

Since Satoshi Nakamoto created bitcoin in 2008, ...READ MORE

Jan 21 in Blockchain by TONGZHENG

retagged Jan 24 by Omkar 65 views
–1 vote
1 answer

How to get pending transaction in geth?

You can check the pending transactions using ...READ MORE

Jan 16 in Blockchain by Omkar
• 67,620 points
261 views