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Questions tagged [kovan]

14 questions
2
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2 answers

Public kovan test net

How to get Kovan public test net in metamask as I have tried all the recommended sites but did not get it. These links do not work for me to get it. https://faucet.kovan.network/ https://gitter.im/kovan-testnet/faucet
yamna iftikhar
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1 answer

Chainlink job is not being called by the Solidity Smart Contract using Operator.sol contract

The job spec deployed and running on Chainlink node is being successfully triggered and completed when called using the Solidity smart contract that is using the Oracle.sol contract. But, since the requirement is to return the large response…
SYED ASAD KAZMI
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1 answer

Gas estimation error with Chainlink and Remix

I am working on a project that will need to use ChainLink to make external API calls from the Ethereum blockchain. I was testing out the demo code like so: // SPDX-License-Identifier: MIT pragma solidity ^0.8.7; import…
dhruvm
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Where to find Uniswap v3 ERC20 token and liquidity pool contract addresses on ROPSTEN and other non-mainnet networks?

I am in the process of testing out some Uniswap v3 libraries like https://github.com/uniswap-integration/simple-uniswap-sdk/ and would like to know how to find pool and token addresses for Uniswap v3 on the Ropsten network and eventually for the…
ElHaix
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Chainlink Node - job failed encode_tx and submit_tx error

I followed the official documentation for Chainlink fulfilment using kovan network. I run the below code pragma solidity 0.6.6; import "@chainlink/contracts/src/v0.6/Oracle.sol"; [ get from official document…
Ebin Thomas
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1 answer

Deploying blockchain transaction to Kovan testnet via web3 requires much more funds than in reality using web3

I have recently migrated my smart contract from Ropsten (changing only the Infura Node) to Kovan and the first thing that I encountered was an error: Error by deploying transaction Error: Returned error: Insufficient funds. The account you tried…
Przemysław Winszczyk
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Lesson 10: Defi and aave. Whenever i try to deposit the weth then mainnet-fork throws an error as safemath substraction overflow

Code This code works fine with kovan testnet like i can deposit but when trying on mainnet-fork it give safemath overflow error: Brownie v1.19.0 - Python development framework for Ethereum AaveBrowniePyProject is the active project. Launching…
aman pal
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0
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1 answer

VM execution error at contract simulation UMA LSP contract

I am trying to deploy a smart contract on Kovan testnet with the UMA protocol. More specifically following this tutorial: https://docs.umaproject.org/developers/deploy-an-lsp I am running the deployment script with the following parameters: node…
Dimitri
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How do I get the value of a string back using Chainlink

I have followed this tutorial Make a GET Request. Now I would like to get the value of a string instead of an integer. So I adjusted the path to request.add("path", "RAW,ETH,USD,MARKET") which points to a string. To the best of my knowledge I need…
Connor Lloyd Moore
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Kovan Testnet AAVE Flashloan with Brownie Python

I am quite new to coding with limited experience, after following the Patrick Collins tutorial on flash loans from AAVE, everything works fine and have the environment installed. I receive this error upon deploying: INFO: Could not find files for…
jonnykashhh
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0
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1 answer

How I can get test account to deploy smart contract with truffle?

With help of https://ethdrop.dev, I can get a test account with 0.001 ETH ( kovan test network ), and, I can deploy smart contract with remix ide. I used truffle to make a solidity project, and I am trying to deploy to test network (kovan) instead…
Wang Liang
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1 answer

web3 call got 'ERROR: The returned value is not a convertible string:'

Here is my contract https://kovan.etherscan.io/address/0x9c08fb4e6666a796ef1ade3f58cb0a3e3f469e7c#code I was trying to call the function in the contract by web3 ,for example: //address and abi are copied from url above let contractAddr =…
xianshenglu
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How to get Kovan testnet faucet

How to get kovan faucet i tried some ways but failed so how can get some kovan faucet so is there any way to get these free testnet Or how to test the flash loan for free in testnet
Vishnu S
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1 answer

Chainlink: searching for nodes and jobs in the Marketplace

I'm coding a couple of examples available in the Chainlink's docs, like this one https://docs.chain.link/docs/multi-variable-responses/, and so far is everything is working fine. As you can see, in the Multi-Variable Respone example, they set the…
Fabiano
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