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2 votes
1 answer
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Alternative solution for loops in subscription smart contract design

I am a new developer, working on a smart contract mostly for my own learning. I am developing a Smart Contract to handle subscriptions. The contract has the below features. Subscribers can subscribe ...
Colm Seale's user avatar
1 vote
0 answers
204 views

Execution erorr: Invalid opcode on estimateGas | Possible unhandled promise rejection

pragma solidity ^0.5.0; I get invalid opcode error when trying to estimate gas needed for my transaction from react-native using the following line of code: const gasAmount = await contract.methods ...
user63058's user avatar
1 vote
0 answers
404 views

Contract deploy estimateGas undefined

When ti try to estimate gas for my contract to deploy, I always get undefined result. This is my code: const toDeploy = contract.deploy({ data: '0x' + bytecode, arguments: [[web3.utils....
imfabio's user avatar
  • 11
0 votes
1 answer
41 views

Smart contract unpredictable gas for seemingly simple method

I'm having an issue where a method that seems straightforward is showing a huge amount of gas requirements. I tried to run it from the verified polygonscan UI and metamask tells me it can't estimate ...
mcw's user avatar
  • 101
0 votes
1 answer
673 views

Error in Ethereum Wallet:"Couldn't estimate gas, resorting to default parameters. Transaction is likely cheaper than the estimate"

I am using ethereum wallet for deploying contracts in my private blockchain. But whenever I try to send a transaction in my ethereum wallet it shows an error that says, "Couldn't estimate gas, ...
Monica Mohandas's user avatar