All Questions

Context: I'm fairly new to web3, and as we all know it's developing quite regularly. I'm working towards a "sign in with Metamask"-tyfunctionality using [email protected]. Most of the docs/...

I know there are some resolutions about parsing transaction input data, but they don't work with go. I wander if there is any way i can use with abi available. Specifically, When i receive a ...

I wonder why I get the error when I have v0.5.0 everywhere and do the following: In my Action.sol: pragma solidity ^0.5.0; In Migrations.sol: pragma solidity >=0.5.0 <0.6.0; When running truffle ...

ZepplinOS contracts do not use constructors in it's zos implementation, and instead uses an initialization function that it imports from zos-lib/contracts/Initializable.sol package. In order for the ...

i´m learning Solidity now, and i saw this code on web but when i try to use the method "Deposito" i receive a error. Someone knows what's that ? (PS.: I try to put the value but every time i chose ...

If I index a parameter or any number of parameters, some of the return values get swapped and/or corrupted.. I am not sure if any one else has ever seen this behavior before. Non-indexed Event: ...

So I am trying to create a signature of a string, but I cannot do that, as I always get error stating MetaMask - RPC Error: Error: WalletMiddleware - Invalid "from" address. (code: -32603). I am ...

New to Ethereum and smart contracts, so I apologize if this question isn't really hitting the target. Here's my problem: I want person A to create a product and sell it to person B. Person B then ...

I have written a basic hello world! smart contract and deployed using testrpc and truffle. I have a function in the contract that returns a value and i am using this function and the value it returns ...

I want to be able to call a function of a contract every 60-120 seconds, in my JavaScript code I have a set timer that runs for down a timer from 120 seconds down to 0 by subtracting 0.01 every 10 ...

If I use my geth --identity "MyNodeName" --rpc --rpcport "8545" --rpccorsdomain "*" --datadir Users/aydinabadi/TestChain1 --port "30303" --rpcaddr "127.0.0.1" --nodiscover --rpcapi "db,eth,net,...

I'm trying to sign a transaction offline and then send it using sendRawTransaction since I'm connected to an Infura node. My raw transaction looks like this let rawTransaction = { "from":...

I am using solidity version 0.5.4 and its same for solc. After going through solc's github page, i got confused about what to include in content of Example usage without the import callback like we ...

Firstly, this is not an inheritance problem like in this post I have the following two files ( ManagedWallet.sol & ManagedWalletLookup.sol ) pragma solidity ^0.4.24; contract ...

I am running some tests on my smart contracts and I need to gather a bunch of data to process in a spreadsheet. Is it possible to write to a file from the console?