All Questions

Filter by
Sorted by
Tagged with
0
votes
0answers
4 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 ...
0
votes
1answer
13 views

Is EOS coin required to run private blockchain?

I am new to EOSIO, I leart that NETWORK, CPU and RAM can be purchased by EOS coin. The question is if I build a private blockchain and do I still need EOS coin to purchase these resources?
0
votes
1answer
16 views

Sent EOS to wrong Account From exchange Coinbase

We transferred funds from Coinbase to another coinbase account but the account name was mistyped due to autocorrect and funds went to an account called 'counbasebase' instead of the exchange '...
0
votes
1answer
14 views

eos-sharp api call gets failed

I am a beginner with EOSIO. I may make a mistake in code. I installed eos-sharp in the visual studio using the NuGet package. My code is as below: using EosSharp; using EosSharp.Core; using EosSharp....
0
votes
0answers
6 views

make inline transfer contract and using it on jungle testnet

hello everyone i am faceing a problem on jungle testnet i am trying to make a inline transfer but i got this error after i work with the api_endpoint the code is #include <eosio/eosio.hpp> #...
0
votes
0answers
10 views

It is possible to get transaction without the block number?

I would like to know if is possible to get transaction without the block number, or how to get the block number corresponds to the transaction ID. Error 3040011: The transaction can not be found ...
0
votes
1answer
13 views

How to integrate Restfull API with smart contract using c#?

I am new to EOSIO. I referred eos.io for learning. Now I need to learn how to integrate API with a smart contract. I am willing to do this in c#. I got answers mostly for eosjs which is used in nodejs,...
0
votes
0answers
6 views

How to use eosjs V20 to create and sign a offline actions?

when I create actions like this,and prapare to use JsSignatureProvider to sign (async()=>{ let actions = [{ account: 'tommy', name: 'hi', authorization: [{ actor: 'tommy', ...
0
votes
0answers
5 views

How to achieve Inter Blockchain Communication (ICB)

I've been reading a couple of articles about IBC using EOS like this one. The problem is I don't know how to achieve this since most articles don't provide specific information. I wanna know if I can ...
1
vote
1answer
29 views

Where is the smart contract is stored

I would like to know where the smart contract is stored after the copilation and deployment. Thanks
0
votes
0answers
8 views

EOSIO calculate transaction_mroot

As a general task i am trying to reverse engineer the production of a Block. With the help of EOSJS i was able to make a transaction from scratch and i can de/serialize it and sign it and so on. Now i ...
0
votes
2answers
9 views

No member name in namespace 'block-signing_authority' in eosio

I am having issues compling the eosio.system contract with the new eosio 2.0 upgrades I keep generating the same error below. What could be the cause of this error ? include/eosio.system/eosio....
0
votes
0answers
9 views

EOS on Lambda - We want to install EOS command in a single directory, without using any OS shared Libraries

On deploying the code - we were getting the following errors 2020-03-06T09:37:08.219Z 8f80dd6a-daf9-4930-869e-44936141ad45 ERROR Error: Command failed: cleos -u https://jungle2.cryptolions.io:...
0
votes
0answers
8 views

How to set the root certification path for supporting https function in http_plugin?

I can find these options (the below) about https in http_plugin, but I can not find the root certification information. --https-server-address arg The local IP and port to listen for ...
0
votes
0answers
10 views

FC Exception encountered while processing chain.get_block

I am trying to get the blocktime for the block, but it is working few times and then started throwing the error.FC Exception encountered while processing chain.get_block. error 2020-03-06T07:33:38.777 ...
0
votes
1answer
13 views

How does the Drive resource in EOS work? Can we store alot of text data and use it like a mysql database?

Ram is expensive for storing user data. EOS has the drive resources for storing data. How much does it cost compared to ram? And is it intended to be used like a mysql database for storing user data? ...
1
vote
0answers
17 views

serialization limit and executed transactions are lost

I get a lot of "serialization time limit 15000us exceeded" when sending transactions to the EOS mainnet with eosjs. Also, a lot of the transactions return status = executed, but are not found on the ...
2
votes
0answers
34 views

Trying to execute a smartcontract action using a multisig account, but it shows executed even when the transc fails due to smartcontract constraints

I'm proposing a transaction to execute an action of some smartcontract, the transaction is showing executed irrespective of failure or success of the smartcontract action(say transferFunds), this is ...
0
votes
0answers
11 views

Does EOS's P2P transmission mechanism support encrypted transmission of information?

I'm not sure if this is already supported. The use case is like this: Using secret-key cryptography, Alice and Bob would have to devise a single cryptographic key that they will both know and use ...
0
votes
1answer
28 views

Setting eosio.code permission for contract account in eosjs

I am trying to set the eosio.code permission for my contract on account kbo2byvpkbiy (private blockchain). The reason I want to do this is calling eosio.token/transfer from within this contract. All ...
0
votes
1answer
25 views

How do I lookup multiple entries by same secondary indices with more than limit entries?

I have a table with a lot of entries. I want to iterate through all the rows by the same secondary index on multiple pages. TABLE post { uint64_t id; name author; string text;...
0
votes
0answers
7 views

Transfer tx with public api testnet unable to find key

i'm try to test transaction but i got an error :"{ Error: assertion failure with message: unable to find key " here my code: and public api testnet: const rpc = new JsonRpc('https://api.testnet.eos....
0
votes
0answers
5 views

system claimrewards not working

I've been trying to do cleos --wallet-url "http://127.0.0.1:8905" system claimrewards bitgirl -p bitgirl@active but its giving me error Error 3050003: arisen_assert_message assertion failure Error ...
0
votes
0answers
15 views

Serliazing and singing transactions offline

I am trying to test the throughput and latencies of 1-2k token transfer transactions. I got my logic working for a low amount of transactions - <100. However, when I tried sending 1000 transactions,...
0
votes
1answer
27 views

Get transaction EOSJS

I used the following function to get transaction with eosjs, but it doesn't display all the content. (async () => { await rpc.history_get_transaction('...
0
votes
0answers
17 views

Make a smart contracts for trade tokens

Hello guys as the title said I want to make a program for trade between different tokens ? P.S: I tried to make a contract that's call token:transfer action for eosio.token contract but I had to add ...
0
votes
0answers
5 views

system claimrewards

i been trying to do cleos --wallet-url "http://127.0.0.1:8905" system claimrewards bitgirl -p bitgirl@active but its giving me error Error 3090003: Provided keys, permissions, and delays do not ...
0
votes
1answer
9 views

eoslime: Provided keys, permissions, and delays do not satisfy declared authorizations

When Trying to run my test with eoslime test and calling eoslime.Contract.deploy(...., ....) I get Error: the string "{\"code\":500,\"message\":\"Internal Service Error\",\"error\":{\"code\":...
0
votes
0answers
10 views

Unable to connect local node with EOS Studio using custom network mode

I have set up EOSIO using windows subsystem for linux (ubuntu 16.04). Nodeos and Keosd are running. I am able to get a response in browser using the chain api http://localhost:8888/v1/chain/get_info ...
0
votes
0answers
11 views

EOS and IOT to check integrity

I would like to check the integrity of the data sent by the IOT device using EOS. It is the hash of the data that is stored in EOS but the data is stored in the database. I used a smart contract to ...
1
vote
1answer
14 views

Is it possible to do a demo with testnet without buying EOS RAM?

I'm a rookie when it comes to developing Dapps. I'm thinking of doing a project using EOSIO. I just need to do a demo to showcase my project so I don't need to deploy it for others to use. I don't ...
0
votes
1answer
17 views

Error: fetching abi for eosio: deadline exceeded by xx us

When launching a transaction like: await eosioApi.transact({ actions: [ { account: "eosio", name: 'newaccount', authorization: [{ actor:...
1
vote
1answer
13 views

Eos-sharp jungle Error 3090003 when trying to call external smart contract

I’m trying to achieve something quite simple. I try to call eosio.token transfer from one of my smartContract (lomtaxjungle dopurchase), but after severals days i still don’t manage to do it. From ...
0
votes
0answers
6 views

Error running hello-driver tool in eos-vm library

I cloned the eos repo and changed the CMakeLists file to compile the tools folder in the eos-vm library. The compilation was successful (after I added std:: before nullptr_t in a number of places). ...
1
vote
1answer
18 views

could not insert object, most likely a uniqueness constraint was violated

I started a non producing nodeos using latest snapshot to listen the eosio blockchain but i am getting an error. can any body help me? Error: error 2020-02-24T10:59:50.853 nodeos ...
0
votes
1answer
25 views

Monitoring transactions on a private blockchain

I just started working with EOSIO and I created a private blockchain with 4 producersfollowing the bios boot sequence tutorial (https://developers.eos.io/welcome/latest/tutorials/bios-boot-sequence). ...
0
votes
0answers
17 views

Make a trade contract between two tokens like (EOS) & (SYS)

hello everyone i made a small contract that trade between two tokens using eosio.token but if i wasn't work on local test how can i have access to EOS tokens or SYS in the main net and how can i do ...
1
vote
0answers
15 views

How to detect microfork

I have a node set in read only mode. So I have set up a plugin that listen to the signals block_header and accepted_block So my question is : Will the block I receive in the callback be always head ...
0
votes
1answer
35 views

eosio.contracts and how it works

Hello guys I have a question about eosio.contrcats I am confused about when I want to deploy my contract and my contract use an esoio.contracts should I deploy them too or there is an eosio.contracts ...
0
votes
0answers
9 views

How to run keosd with CORS allowed [duplicate]

I am running keosd as an independent process. But I am getting CORS error. How can I make CORS allowed for a particular URL?
0
votes
1answer
15 views

Declare custom structs

I am trying to create a custom struct called Student in a contract. Where do I declare or define the struct? I tried to define it in the abi file, but the file was over written when I compile the ...
0
votes
1answer
19 views

Check public keys on contract level

Is it meanwhile possible to check the public key of an account name on contract level? (Not with Cleos) Example: The contract contains some public keys (not the account names). If a user performs a ...
0
votes
1answer
28 views

What is the difference between std::string and eosio::string?

Why should I use eosio::string over std::string? What are the use cases where it would make a difference?
1
vote
1answer
25 views

Testnet connections setup

How should we setup connections between nodes in EOS blockchain (via --p2p-peer-address)? 1) all-to-all 1->2 1->3 .. 1->21 2->1 2->3 2->4 ... 2->21 ... 21->20 2) chained (...
1
vote
0answers
31 views

Where to download EOS wallet? Why it is not available on the website? [closed]

I just would like to know why I'm not able to download wallet software (for linux or Windows) for some Crypto Tokens or Cryptocurrencies? For example: EOS. I have searched on the website and I see ...
1
vote
1answer
11 views

Reference block is invalid during Transfer

I Tried the transfer of 1 eos from my account to other, to day just for some test transfer, i am using cleos to transfer but when i did it throwed the exception Error 3040007: Invalid Reference ...
1
vote
1answer
34 views

I have doubts about intercontract communication

I have read that: In order to call an inline action, that is to call an action of contract A from contract B, there is a need to set some special permission. In this case, the Ram payer for the ...
0
votes
2answers
24 views

Does EOS support signing a string?

Ethereum has web3.eth.personal.sign that supports signing any string. Obviously EOS supports signing transactions, but I don't see any support for signing a string. Have I missed this or does EOS ...
0
votes
0answers
13 views

Does anyone used EOSIO-java to connect to EOSIO?

I am trying to connect Java to EOSIO using eosio-java example. tried with gradle and maven in java, with the below example https://github.com/EOSIO/eosio-java#installation Two classes are not found....
2
votes
1answer
19 views

Is EOS Account creation free?

I used scatter to create an account, is it true that account creation is not free? How do I check how much it costs? I can see also via "http://eosflare.io/account/" that I have some EOS stacked in ...

15 30 50 per page
1
2 3 4 5
44