Generate number contract easily

Aug 6th, 2022
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How to generate number contract

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hello guys in this video we will discuss how to generate random number in smart contract using chain link [Music] so this is the chain links documentation page lets see the code to get the random number as you can see the code is given here we will directly copy this code and paste it in our remix id i have already created one file and pasted this code also you can get the complete smart book on dappworld.com the link is given in the description below so lets understand the code first we have imported the vrf consumer base solidity file and then we have declared a contract called random number which is extended with vrf consumer base so here are some internal variables dont need to worry about that and we are storing our final result in random result variable which is already made as a public now in the constructor of vrf consumer base we have two arguments like vrf coordinator and link token address also on line number 19 we have a key hash so this is the most concerning part of t

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In order to generate a truly random number in Solidity, a seed must be sent to an off-chain resource, such as an oracle, which must then return the generated random number and verifiable proof to the smart contract.
The idea is you can get blockhash and clock from Solana network as random input seeds to create the next random number. another code snippet which will be good point to start creating randoms: //convert blockhash to random seed string let recentblockhashdata = recentblockhashes. data.
However, the execution of smart contracts is deterministic, and smart contract developers do not have access to native random number generation functions natively in Solidity. The randomness must come from outside of the blockchain.
You cannot create truly random numbers but you can pseudo-random numbers. Blockchain is a deterministic system so we have to make sure that each node must give the same random number. Keep in mind that generating a random number this way has a fee (paid in LINK). You will cost 10 LINK per request on Ethereum.
There are two main methods that a computer generates a random number: true random number generators (TRNGs) and pseudo-random number generators (PRNGs). The former uses some phenomenon outside the computer for its number generation, whereas the latter relies on pre-set algorithms to emulate randomness.
Random number generation in Solidity must be done by sending a seed to an off-chain resource like an oracle, which must then return the generated random number and verifiable proof back to the smart contract.
Chainlink VRF follows the Request Receive Data cycle, which works like this: we send a request for a random number to an oracle in one transaction. Then Chainlink generates one or more random values and cryptographic proof of how these values were determined.
Random numbers are numbers that occur in a sequence with the following two mandatory conditions: The values are uniformly distributed over a set interval. One cannot predict future values based on past outputs.

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