VRF SUVERY TIME

This is a time statistics application that returns a random number of the vrf contract on the blockchain binance smart chain network.

Contract :

• VRFv2DirectFundingConsumer.sol : This is a contract that provides a function to find random numbers based on chainlink

Call transaction and listen event to calculate response time :

scripts folder:

• Request.js : get the contract address and make a call to a large number of transactions and save the requestId in mongoDB
• Listen.js : get the contract address and listen to the event that generates a random number and then update the response time into mongodb. However, terminating the listening must be done manually.

Schema :

• requestId : last requestId of smart contract
• requestTimeStamp : timestamp when calling random number function
• responseTimestamp : timestamp when event was heard

scatterplot analyst

Get data from mongodb for scatterplot analyst

Build With

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Installation

1. Clone the repo

    https://github.com/ngocban284/vrf-survey-time.git

2. Install NPM packages

    npm install

3. You must enter your Environment variables

    VRF_ADDRESS = vrf contract address in bsc testnet
    MONGO_URI = your mongodb uri

4. Request and Listen event

    npx hardhat run ./scripts/Request.js --network bscTestnet

    npx hardhat run ./scripts/Listen.js --network bscTestnet

5. scatterplot analyst

    python3 ./analysis/index.py

Note

You must make sure vrf contract has LINK token and your wallet address must have BNB testnet