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Questions tagged [eth-call]

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Function Call when Sender Must Be Certain Address

I have a contract on Ropsten, and when I do this is python, I get a result: result = contract.functions.getLastUpdateTime(0).call() So I know the abi is there, the address, etc. There's another ...
4
votes
1answer
28 views

Why does the `DoCall` function use the first account by default?

In this line, // Set sender address or use a default if none specified var addr common.Address if args.From == nil { if wallets := b.AccountManager().Wallets(); len(wallets) > ...
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0answers
88 views

Get Array from a call in Web3j

I have a solidity function that returns an array. I'm trying to read the values inside this array from web3j but it gives me stage results. My solidity function function getAllSubTokenByTokenID(...
0
votes
1answer
32 views

How to understand from web3py if I need a transaction or a call

I have a contract with a function in which only if a certain condition is true, it changes the state of the blockchain otherwise it emits an event and returns: address[] public global_state; function ...
2
votes
1answer
76 views

Call a view function of an Ethereum Smart Contract using a program written in C

my attempt is to call a view function to reatrieve some data from a contract on the Blockchain using a C program. I do have the interface of the contract. I think i need to performe two things in ...
1
vote
2answers
1k views

Can I get the return value of a .call from a contract from the Blockchain?

I know that if I use call from a contract, that I cannot get the return value. I get a true or a false. Is it possible for me to inspect the blockchain afterwords to get the return value? For ...
2
votes
1answer
1k views

Why does this throw a stack underflow error?

Simple contract, one function. function getSha256(uint32 nonce) returns (bytes32 hash) { return sha256(nonce); } > contractInstance.getSha256.call(1); Error: Error: VM Exception while ...
1
vote
1answer
822 views

What happens when you use multiple “call” arguments?

I have a piece of code like so: address x=0x01234..; x.call(data1, data2, data3); Will this do what I expect and call the contract at address x while passing the data in concatenated like data1+...
2
votes
0answers
968 views

eth_call using INFURA

I've developed a very simple smart contract and I'm trying to invoke a function using eth_call. The contract is deployed on the revived Ropsten testnet. If I invoke the function getSTR() sending the ...