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Questions tagged [blockchains]

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Require a method to identify deflationary tokens before initiating a transaction

I have a quick question regarding identifying deflationary tokens before initiating a crypto transaction. For instance, I recently intended to exchange 20 ABC tokens for 10 DANK tokens(Which sends 0.1%...
Kapil Vashisht's user avatar
1 vote
0 answers
28 views

Beginner question on how EOS is used in gambling

Hey so there is this gambling site I use, which according to them uses the EOS blockchain to randomize the outcome. I'm trying to figure out if the games are rigged or not but can't get anywhere since ...
Woopsydoopsy's user avatar
0 votes
1 answer
27 views

EOS Pubkey to Addresses Conversion

I have few Public Keys for EOS and I want to generate Address from them. I was not able to find the conversion code. Any help would be highly appreciated
Mayank Daga's user avatar
1 vote
1 answer
41 views

I want to store additional data on the "submit_transaction" using transact on the api object

I am new to the eosio platform. My goal is to store additional data onto the testnet.eos.io and receive a transaction_id which I managed to do. However on searching my transaction_id I see my ...
Tanzim's user avatar
  • 11
1 vote
1 answer
156 views

What does the EOS block id consist of and can you predict the id

What does the EOS block id consist of and can you predict the id of the blocks that will come out in the future? After looking at the EOS block id, there were certain rules up to the first 7 digits, ...
eeeekk's user avatar
  • 11
0 votes
1 answer
1k views

WAX - Signature error : "Message: transaction declares authority, but does not have signatures for it."

I'm trying to send a transaction from my react frontend to local chain, I have signed in wax cloud wallet and made a transaction. But at last I met this signature error. "Message: transaction ...
devbluesky111's user avatar
0 votes
2 answers
133 views

Auto Start and Stop EOSIO blockchain nodeos

I have a private EOS blockchain setup with peer nodes connected. If any problem occurs and the server gets shut down the nodeos gets stopped (sometimes normally sometimes with dirty flag type errors). ...
Varsh's user avatar
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0 votes
1 answer
41 views

Where to start building a blockchain on EOSIO

Where can I find a step by step or at least the docs on how to create a blockchain on EOSIO? Their website has a bunch of resources but mostly for apps and smart contracts, but not clear info on ...
F_Bass's user avatar
  • 111
1 vote
1 answer
46 views

How to actually deploy a live blockchain?

I have been researching a lot about how to build a new blockchains. So far, all guides say very similar things: Identify use case Identify consensus method Design nodes design blockchain select a ...
F_Bass's user avatar
  • 111
1 vote
2 answers
43 views

It's possible to make a "Selfish Mining Atack" on EOS Blockchain?

" Selfish mining attacks occur when an individual in a mining pool attempts to withhold a successfully validated block from being broadcast to the rest of the mining pool network. After the selfish ...
mengeroshi's user avatar
0 votes
1 answer
357 views

How to sign this EOS transaction provided with below code and response?

This below code is working fine in testnet. I want to do transaction, signing and broadcasting individually. I generated the raw transaction, but I don't understand how to sign it. I have provided the ...
Deepak Garg's user avatar
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2 answers
266 views

how to create a unique user name using public or private key in nodejs?

Like BTC, ETH etc has address, do EOS has address or username etc, I am using below code to generate the public and private key, we do transaction in bitcoin,ethereum etc with a unique address sample ...
Deepak Garg's user avatar
0 votes
2 answers
345 views

How to initialize the blockchain correctly?

I am trying to initialize the blockchain using nodeos --genesis-json /home/nodeos/genesis-test.json --config-dir /home/nodeos/.local/share/eosio/nodeos/config --delete-all-blocks but I am getting an ...
coder123's user avatar
  • 141
1 vote
0 answers
28 views

Hide information in the blockchain

Lets say I want to create a player vs player game with a battlefield and moving armies, the movement and data about the armies and where is it going is put on the blockchain. My question is how to ...
Saxtheowl's user avatar
  • 408
2 votes
1 answer
126 views

How two EOS nodes on two diffrent instances of aws can communicate with each other through an EOS private chain?

I have setup node on each of two aws instance i.e two nodes on diffrent aws instance , thus created a private blockchain on both of the instances . Now how can i make them communicate with each other ...
Ridham CPP's user avatar
1 vote
0 answers
56 views

EOS MainNet local blockchain

I'm trying to run a node, connected to mainnet with ability to search the whole blockchain. So that my node is connected to mainnet blockchain and gets all the new blocks, saving them to local disk. ...
0x49D1's user avatar
  • 141
1 vote
3 answers
47 views

Is there an easy way to track # of operations on EOS in a single day?

I need to know the daily operations on the EOS blockchain. I understand that each transaction can have several operations. If I set up a node on my computer how would I start counting operations? ...
mashup's user avatar
  • 155
0 votes
1 answer
130 views

How to add the formula of ram calculate price for eos in our project?

Actually I am building an application and I would like to add the ram calculation for eos there. if anyone wants to calculate the ram for the accounts creation, he can use our website.thanks.
Hasnat Ahmed's user avatar
2 votes
1 answer
88 views

What does it mean to have multiple blockchains on EOS

In the whitepaper v2, I saw a section for inter-blockchain communication. Does this mean communicating with blockchains based on other technologies like Ethereum? If not does that mean that each DApp ...
DEVANABOINA VINOD ANKITH's user avatar
0 votes
1 answer
273 views

eosio 1.5.1 - keosd & produces: Application does have a valid signature

Following the eosio website I install eosio with brew. https://developers.eos.io/eosio-home/docs/getting-the-software The first step after the install is to run keosd &. I get the following ...
smoss's user avatar
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1 vote
1 answer
504 views

Where can one find the total size of the eos blockchain?

Is there a site to see the total size of the eos blockchain like how one can see that the bitcoin blockchain takes 250GB on blockchain.info
Patoshi パトシ's user avatar
0 votes
1 answer
57 views

How is the the crash of a BP handled?

I am wondering if a BP crashes, how do the remaining 20 BPs know this? If they do not know, all block not irreversible so we can be hack? Please give me some details for this. Thanks!
user avatar
2 votes
1 answer
50 views

What is Worbli that is a fork of EOS?

What exactly is Worbli blockchain? Is it a fork of EOS and what problem does it solve that EOS cannot? Why didn't they just build on top of EOS?
Patoshi パトシ's user avatar
1 vote
1 answer
68 views

I read that you can use the cleos command without having nodeos synced. How does one do this?

I read somewhere you can use the command line cleos without having to sync or even turn on nodeos. Which means avoiding the need to download 60+gb of blockchain data. What are some of the ...
Patoshi パトシ's user avatar
4 votes
1 answer
94 views

Which BP's offer snapshots for v1.4? --mongodb-wipe?

Which BP's or websites offer snapshots for v1.4 ? Is --mongodb-wipe still required for replaying?
Marcel's user avatar
  • 383
1 vote
2 answers
70 views

Onboarding new eos users to a note taking dapp

I have a note taking dapp on the Ardor blockchain and say I wanted to migrate it to EOS. Currently these notes are just palin text messages stored in the blockchain directly (ardor data cloud). In ...
Patoshi パトシ's user avatar
1 vote
1 answer
25 views

What Data ownership really is in EOS?

All data of transactions can be view live as EOS is public , suppose i made a transaction on EOS block-chain this transaction belong to me but still people can see it. Here is my Question how this ...
Abdul Manan's user avatar
1 vote
2 answers
908 views

How big is the EOS blockchain? Does it grow much faster compared to others due to the short blocktimes?

How big is the EOS blockchain in disk size? Since its faster block times, doesn't the size of the blockchain grow much faster?
Patoshi パトシ's user avatar
1 vote
1 answer
210 views

Hello contract: How do i execute "hi" action when notified by eosio.token contract of an EOS transfer?

I want to extend the Hello contract (as an exercise) How do i execute "hi" action when notified by eosio.token contract of an EOS transfer ? I understood i have to extend EOSIO_ABI macro to handle ...
Sucrenoir's user avatar
  • 156
2 votes
1 answer
72 views

I Need Help Setting Up a Back-End Infrastructure for my Future DApp

I'm going through the process of designing a desktop DApp. I'm going to use GraphQL API's to connect the EOS blockchain to a Node.js server that'll use MongoDB with Electron.js and React.js on the ...
Brian M.'s user avatar
  • 141
4 votes
1 answer
691 views

How cpu, ram works for eos and are transactions free?

I'm a little bit fuzzy about what's going on for eos. All say transactions are free, but what you do is you make a stake. My questions are: 1) What is a stake? 2) After making a stake, what cpu and ...
Chemistry's user avatar
  • 225
3 votes
1 answer
715 views

How does the EOS account system work together with smart contracts?

It's my first step into eos and Trying to get some ideas. I really do hope you can help me. Question 1) As we all know, we can transfer some coins from one to another account by using account_names. ...
Chemistry's user avatar
  • 225
3 votes
2 answers
866 views

EOS blockchain explorer [closed]

Where i can check if my EOS created account is successfully created or not? is there something similar website like etherscan.io for EOS? i spent few hours but could not find anything useful
shawn's user avatar
  • 131
1 vote
0 answers
268 views

run a private EOS fork on Raspberry Pi

for development purposes, is it possible to run a private version of EOS on a Raspberry Pi? what are the required steps to fork, build, then run it on a Raspberry Pi?
Hadi Farnoud's user avatar
3 votes
1 answer
583 views

use EOS as private blockchain for a loyalty system

We are working on a loyalty system powered by blockchain. Using blockchain enables us to have basic security at the beginning and scale easily. it makes total sense to us. the loyalty system will ...
Hadi Farnoud's user avatar
2 votes
2 answers
146 views

How to scrape all accounts/public_keys in EOS mainnet?

I am doing a research project at University. Since the accounts and public_keys for EOS change dynamically. Sites like this https://eostracker.io only display 20 accounts per page and it doesn't ...
user avatar
1 vote
1 answer
74 views

EOS: In order to save & show other clients a piece of information. Is transaction needed? To whom?

Suppose I want to save and send this information to all the world: "I'm Fu Song, I made Taylor Swift pregnant, and I'm going to marry her on Christmas, 2018, so that I will still be a responsible ...
Fu Song's user avatar
  • 35
1 vote
1 answer
203 views

How To Reset After Unclean Shutdown? Addr in use; no instance of nodeos running

Here's how I'm running nodeos: nodeos -e -p eosio --plugin eosio::chain_api_plugin --plugin eosio::history_api_plugin I already tried deleting the "data" folder in .local/share/eosio/nodeos/ and ...
JavaHead1560's user avatar
0 votes
1 answer
180 views

EOS world state sharding

What is the current plan to shard EOS blockchain state? (Different from transaction parallel processing). As far as I understand currently all block producers need to store everything. When the state ...
Mikko Ohtamaa's user avatar
2 votes
1 answer
213 views

Can I stake back my bandwidth without cost?

Say I have staked enough eos for 10mb of bandwidth. When I run out of bandwidth, can I unstake and stake back as soon as possible to get 10mb more of bandwidth without any cost?
Jordi Goyanes's user avatar
0 votes
1 answer
116 views

How RAM is managed between PBs

In EOS smart contract developers are able to utilize the database functionalities. According to official document they are RAM. So I wonder if this is distributed database which included in Blockchain ...
congnghebitcoin.com's user avatar
1 vote
0 answers
247 views

EOS Block Explorer

I have a local EOS testnet running and I am trying to run this block explorer against my EOS local testnet. I launch https://localhost:4200 in a browser and look at the nodeos output terminal. Here ...
duncwa's user avatar
  • 11
3 votes
1 answer
1k views

How can I sync my nodeos with a Mainnet or Testnet?

I can't find in the wiki how do you sync your nodeos with a testnet or mainnet. I need this for a project I'm developing.
Jordi Goyanes's user avatar
6 votes
2 answers
229 views

Block.One are not starting the EOSIO blockchain, so who will be?

In the latest community announcement, Block.one have sent a reminder that they will not be launching any of the initial EOSIO blockchains, and warning us not to share our private keys with untrusted ...
ToniWidmo's user avatar
  • 395