All Questions

I was staking some EOS in Lynx Wallet. How to unstake and withdraw after update? Hi, I had some EOS in Lynx Wallet (Android) since a long time. Recently I updated the Lynx Wallet. Now it says TLOS:...

What can I do to not lose the data ?

I want to set a group vector as a secondary index in the user smart contract. group is the list of groups. Following is the changes I am doing: struct [[eosio::table]] usertable { ...

The RAM is the resource to keep information of a Dapp user in the blockchain memory. Where does this comes from? Who does release it? Who determine its supply and how?

I have three smart contracts (A, B, C) and one account (X). As the requirement is I just need only one authority (administrator) who is going to manage all these smart contracts data. So I deployed ...

I am trying to setup mongodb on private network node on cent OS 7 based server but it throws error unable to find plugin: eosio::mongo_db_plugin. I have uncommented mongo plugin settings in config.ini....

We are looking for contract-execution capabilities similar to Ethereum's eth_call that allows for executing a smart contract via sending an RPC call. From EOS.IO's Chain API, https://developers.eos....

I am trying to add a the "eosio.code" permission to an account on testnet. I am using the following command: cleos -u https://api.testnet.eos.io set account permission lsqkeotnnpyu active '{"...

I am working on two smart contracts Users and Groups. The relation is one user can have many groups. Can I have such a relation in these smart contracts? After smart contract deployment and data ...

In Ethereum RPC, there is an eth_call that allows to execute a smart contract function on the RPC node. Does EOS.IO's ChainAPI supports the similar capability with eth_call?

I setup an eos private network which is creating block at speed of 500ms per block is it possible to reduce it to 2sec per block or more The problem is most of the blocks gets produced with 0 txs in ...

So, I'm just starting and I run a MacOS device. First issue: "Failed to connect to localhost port 8888: Connection refused" after running curl http://localhost:8888/v1/chain/get_info in MacOS I ...

Hi recently when I use the secp256k1 library to generate the test vector, I find that EOS add some more API into the "official secp256k1" lib of bitcoin. For Exp, for signature generating, EOS lib API ...

I want to write an EOS smart contract to manage users data. I need that only some admin account will able to add, update and delete users and the particular user can only update data. Can I check ...

I have a private blockchain based on EOS. I would like to know, know how to secure all access to the EOS blockchain using an account. I'm talking about access to APIs that could give information or ...

I just upgraded my scatter to version 12.1.1 and I'm getting the error: "There was an issue discarding DAPPHDL" When I try to wipe it.

Hello I successfully deployed my contract on the jungle testnet on the account rpstestacc13. However when I want to push an action it says that it is missing authority of rpstestacc13. polo@polo-...

I am trying this to set eosio.system smart-contract using this command: cleos set contract eosio /home/varshakhandre14/contracts/newcontract/eosio.contracts/build/contracts/eosio.system/ I am ...

I am working on EOSIO for a few days. I am following https://developers.eos.io/welcome/latest/tutorials/bios-boot-sequence to build and set eosio.contracts. In this tutorial, I need to install two ...

The imagined application allows users to participate in an auction and make bids in cryptocurrencies. There are several behavioral rules that control the execution of the auction and determine the ...

I went through the tutorial adding inline actions to external contracts. I understood most of it but it didnt work with eosio.token contract. I have my contract. From that contract I want to create an ...

Hi I have a question about the multi Index table. So in my table I have the user name (primary key) and a uint64 choice. I have gone through the documentation on how to emplace, modify and delete ...

I am following the given tutorial of multisig : https://steemit.com/eos/@genereos/eos-multisig-tutorial And I am stuck for the command cleos multisig exec partner11111 payme -p partner11111@active ...

I want to build a local blcokchain explorer. I used the offical eosio-explorer, but it didn't work. The postgreSQL light always red. I can't search the block form number or transactions. I can use the ...

Here: var privateKeys = [...]; var sp = new JsSignatureProvider(privateKeys); var key = 'ASG...'; sp.addKey(key); // (1) I want to add new key to JsSignatureProvider, but I can't find method like (...

I am using eos-sharp to get data from the eos smart contract. I am trying to get actions data by using: var resultaction = await eos.GetActions("dqzmember", 0, 30); I need information from ...

I want to do something like a typing game. Would it be possible to create an Action where the user is represented a string. As soon as he presses this action a timer will start until he submits his ...

I am getting the actions log data using an action constructor in a smart contract. I need to save this data in MongoDB from the smart contract. How can I do this? I didn't get exactly my required ...

1) Snapshot file size is remarkable small relative to blocks.log size. Exactly what data is stored in snapshot file? 2) As I understand contracts states is stored in snapshot file. But history_plugin ...

This operation was not performed by me and I physically kept my account information .... Can I get the details or email of the person in question from kucoin exchange with the transfer information? ...

1) What is purpose of directories named: blocks-2020-04-15T06:55:01.360 blocks-2020-04-15T06:55:13.755 2) What is purpose of file named: portable-reversible-blocks-2020-04-15T06:55:01.407 3) What ...

What is the way to create a map from 256 bit integers to values? Is it std::map<>? or will std::map<> become slow as the data grows? If it is slow, what is faster?

I am writing a smart contract to add, erase data and write logs accordingly. Below is my smart contract: #include <eosio/eosio.hpp> #include <eosio/print.hpp> #include <eosio/system....

My node is syncing very slow. If I try to start the node from the latest snapshot to sync with node and add previous snapshot later, will this work? Will it resolve the histroy issue?

I am trying to write unit tests for functions in a smart contract that require access to tables within the smart contract. I tried to set this up using the hello_test.cpp code as a base and when I get ...

I am writing eosio smart contract. I want to record the logs using a smart contract. How can I do this? I searched but didn't get any satisfying answer. Any help would be appreciated.

I am trying to maintain an Eos node on my server, but the fact, it is very large and syncing is very slow. I am thinking, is it possible if I start the node with the latest snapshot to sync with ...

I am sorry to bother you, I am a little confused about the cost while using a token contract: the contract provider will pay all the utilities if a user using the contract including the CPU, NET and ...

I have written one smart contract for insert, update and delete data. The smart contract is compiled and deployed to the two accounts. I insert data using calling the action upsert, this transaction ...

We are trying to pass additional information about specific actions and data field through to the abi file. Is there a way to include comments/text in the cpp file that can be passed through and ...

I create 3 different account already, but i try to create new account with this: cleos system newaccount eosio --transfer kyc1 <PUBLIC_KEY> --stake-net "100000000.0000 SYS" --stake-cpu "...

" 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 ...

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?

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 '...

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....

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> #...

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 ...

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,...

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

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 ...