Questions tagged [chainlink]

Chainlink is a decentralized oracle network that enables blockchain smart contracts to securely access off-chain data feeds.

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Advantage of Chainlink's VRF over commitment scheme chain

News Chainlink announced a randomness oracle via VRF: https://blog.chain.link/verifiable-random-functions-vrf-random-number-generation-rng-feature/. Question What is the advantage of an VRF over a ...
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Chainlink node error: BumpGasUntilSafe FindTxBy Attempt: record not found

I am currently testing sending requests to my Chainlink node on Ropsten. I am following the documentation for running a Chainlink node and all went well until. 40 BumpGasUntilSafe FindTxByAttempt: ...
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19 views

API Call in solidity: gas required exceeds allowance (8000029) or always failing transaction

I'm trying to make an API call in solidity. pragma solidity ^0.6.0; import "github.com/smartcontractkit/chainlink/evm-contracts/src/v0.6/ChainlinkClient.sol"; contract GetData is ChainlinkClient { ...
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How to make an API call in solidity using Chainlink?

I am following the documentation from the Chainlink site, and I am attempting to make an API call. The main issue is I'm not sure what "address" is referring too. I am using remix in solidity v0.6 ...
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Chainlink services are not supporting the privateFor transactions in Quorum/Kaleido

We are exploring Kaleido and Chainlink for one of our use cases. What we have done: We have created a network of Quorum/Raft nodes. We had setup the chainlink service for the network. We have setup ...
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How does specifying job parameters on Chainlink work?

I am trying to understand Chainlink, and I am running into a wall. I found this tutorial, which explains how I can create a job spec using JSON. The tutorial explains that you can specify the url, ...
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185 views

Chainlink Kaleido Contract compilation

I am trying to re-compile the ChainlinkEthPrice contract found in the Kaleido Sample Gallery here: https://kaleido-io.github.io/kaleido-samples-gallery/#/kaleido-samples-gallery/chainlink. Codes as ...
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341 views

Chainlink vs Oraclize [closed]

I am trying to choose between Chainlink vs Oraclize. Can anyone advise the difference between both solution? Nathan Aw