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Unanswered Questions

376 questions with no upvoted or accepted answers
7
votes
1answer
105 views

Using “native” wat/wasm function in smart-contract

I have to do some heavy computation in my smart-contract, like say a+b. Fortunately, I have written some very efficient implementation in "native" (web)assembly, like: File add.wast: (module (func ...
5
votes
1answer
293 views

Is it secure to use keosd in an aws to let dapp/app server sign transaction?

I would like to know if it is secure to run keosd on an aws locally as a hot-wallet, to let the server of a dapp send a transaction which should be signed to the aws. The server of the dapp would get ...
5
votes
1answer
70 views

BUG when two accounts send action at the same time to modify multiindex table

It took me several days to find the bug. I got a table like this TABLE t {uint64_t key, name player1, name player2, uint64_t status}; When the contract received the specific action, it will go ...
4
votes
1answer
130 views

How do I create a Multi-Index DB secondary index from a String?

I'm developing a Smart Contract for EOSIO. I have a Multi-Index table with a uint64_t primary key. I'd like to add a secondary index to the table. Ideally the data I'd be indexing on would be a std::...
4
votes
1answer
55 views

How can you make sure you know what the contract does when you send an action?

Say you want to send an action to a smart contract, and you know the WASM of the contract. You somehow obtained the original source code which was in C++, you compiled it to WASM, and you got the same ...
4
votes
1answer
183 views

eosio.contract cannot compile with error code 1 of eosio.wasmsdk by Clion

We are compile the eosio.contract v1.2.0 using Clion by following that: Dependencies: eosio v1.1.2 eosio.wasmsdk v1.1.0 Cannot get compiler information: Compiler exited with error code 1: /usr/...
4
votes
0answers
35 views

Creating a base contract with (virtual?) base methods that can be overriden

is there a possibility to create a base contract with methods that can be overridden in contracts that inherits from it? Cheers
4
votes
1answer
464 views

How to set up chain of permission levels for a user?

This is a great answer that describes the ways you can handle user permission levels for inline actions. According to that answer: This can be done a few ways (ordered from most risky for the user ...
3
votes
1answer
39 views

Require authorization with conditions require_auth(name1 OR name2)

Is there any possibility to implement conditional require_auth(<condition>) or what is a good practice to make contract accept invocations from a set of predetermined accounts? Is there any ...
3
votes
1answer
40 views

Different actions count returned in every request

I launched private EOS network with bios boot tutorial. Then I pushed some transactions to the network. Now I want to retrieve all actions for an account useraaaaaaah. But every time I make a request ...
3
votes
1answer
64 views

How to verify signature from $ cleos get block BLOCKNUM

How to verify the signature of data returned from $ cleos get block BLOCKNUM to insure that the data returned came from the blockchain and not 'spoofed' by a man-in-the-middle? cleos get block 132 {"...
3
votes
2answers
98 views

Is LevelDB used in EOS?

I know Ethereum uses leveldb. When I checked into EOS I could not find that much out. I thought when I tested I did see leveldb. Can someone confirm how the immutable data is stored? EDIT I think ...
3
votes
1answer
67 views

Is is possible to defer a non abi action using a abi action?

I know we can defer a action in EOS, I invoke a non-abi action from an abi action like this: eosio::transaction txn{}; txn.actions.emplace_back( eosio::permission_level(owner, N(active)), N(...
3
votes
1answer
77 views

I can only find 10 block producers with valid SSL. Is that correct?

I want users to have option to select block producers from a list in my DAPP. But I can only find 10 block producers that has SSLendpoint. I first get block producers from EOS https://api.eosuk.io:...
3
votes
1answer
95 views

EOSJS how to query the top voters

I can get some unsorted voters by using await eos.getTableRows({ json: true, code: 'eosio', scope: 'eosio', table: 'voters', // tableKey, // lowerBound, // upperBound, ...

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