mirror of
https://github.com/stronk-dev/RandomChad.git
synced 2025-07-05 18:35:10 +02:00
144 lines
4.9 KiB
JavaScript
144 lines
4.9 KiB
JavaScript
const app = require( './express' )()
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const name = require( 'random-name' )
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const { db } = require( './firebase' )
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const { getTotalSupply } = require( './contract' )
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// ///////////////////////////////
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// Data sources
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// ///////////////////////////////
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const globalAttributes = [
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{ trait_type: "Age", display_type: "number", values: [
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{ value: 35, probability: .5 },
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{ value: 45, probability: .25 },
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{ value: 25, probability: .25 }
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] }
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]
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const heavenlyBodies = [ "Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune", "Pluto", "the Moon", "the Sun" ]
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const web2domain = 'https://rocketeer.fans'
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// ///////////////////////////////
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// Rocketeer helpers
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// ///////////////////////////////
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// Pick random item from array with equal probability
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const pickRandomArrayEntry = array => array[ Math.floor( Math.random() * array.length ) ]
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// Pick random attributes based on global attribute array
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function pickRandomAttributes( attributes ) {
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// Decimal accuracy, if probabilities have the lowest 0.01 then 100 is enough, for 0.001 1000 is needed
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const probabilityDecimals = 3
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// Remap the trait so it has a 'lottery ticket box' based on probs
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const attributeLottery = attributes.map( ( { values, ...attribute } ) => ( {
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// Attribute meta stays the same
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...attribute,
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// Values are reduced from objects with probabilities to an array with elements
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values: values.reduce( ( acc, val ) => {
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const { probability, value } = val
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// Map probabilities to a flat array of items
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const amountToAdd = 10 * probabilityDecimals * probability
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for ( let i = 0; i < amountToAdd; i++ ) acc.push( value )
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return acc
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}, [] )
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} ) )
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// Pick a random element from the lottery box array items
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return attributeLottery.map( ( { values, ...attribute } ) => ( {
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// Attribute meta stays the same
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...attribute,
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// Select random entry from array
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value: pickRandomArrayEntry( values )
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} ) )
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}
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// ///////////////////////////////
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// Specific Rocketeer instances
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// ///////////////////////////////
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app.get( '/api/rocketeer/:id', async ( req, res ) => {
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// Parse the request
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const { id } = req.params
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if( !id ) return res.json( { error: `No ID specified in URL` } )
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// Chech if this is an illegal ID
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try {
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// Get the last know total supply
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const { cachedTotalSupply } = await db.collection( 'meta' ).doc( 'contract' ).get().then( doc => doc.data() )
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// If the requested ID is larger than that, check if the new total supply is more
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if( cachedTotalSupply < id ) {
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// Get net total supply through infura, if infura fails, return the cached value just in case
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const totalSupply = await getTotalSupply().catch( f => cachedTotalSupply )
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// Write new value to cache
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await db.collection( 'meta' ).doc( 'contract' ).set( { cachedTotalSupply: totalSupply }, { merge: true } )
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// If the requested ID is larger than total supply, exit
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if( totalSupply < id ) return res.json( {
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trace: 'total supply getter',
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error: 'This Rocketeer does not yet exist.'
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} )
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}
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} catch( e ) {
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return res.json( { trace: 'total supply getter', error: e.message || JSON.stringify( e ) } )
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}
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// Get existing rocketeer if it exists
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try {
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const oldRocketeer = await db.collection( 'rocketeers' ).doc( id ).get().then( doc => doc.data() )
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if( oldRocketeer ) return res.json( oldRocketeer )
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} catch( e ) {
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return res.json( { trace: 'firestore rocketeer read',error: e.message || JSON.stringify( e ) } )
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}
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// The base object of a new Rocketeer
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const rocketeer = {
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name: `${ name.first() } ${ name.middle() } ${ name.last() } of ${ pickRandomArrayEntry( heavenlyBodies ) }`,
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description: ``,
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image: ``,
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external_url: `${ web2domain }/api/rocketeer/${ id }`,
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attributes: []
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}
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// Generate randomized attributes
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rocketeer.attributes = pickRandomAttributes( globalAttributes )
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// TODO: Generate, compile and upload image
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rocketeer.image = web2domain
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// Save new Rocketeer
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try {
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await db.collection( 'rocketeers' ).doc( id ).set( rocketeer )
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} catch( e ) {
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return res.json( { trace: 'firestore rocketeer save', error: e.message || JSON.stringify( e ) } )
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}
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// Return the new rocketeer
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return res.json( rocketeer )
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} )
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// ///////////////////////////////
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// Static collection data
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// ///////////////////////////////
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app.get( '/api/collection', ( req, res ) => res.json( {
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description: "A testnet collection",
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external_url: web2domain,
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image: "https://rocketpool.net/images/rocket.png",
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name: `Rocketeer collection`,
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seller_fee_basis_points: 0,
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fee_recipient: "0x0"
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} ) )
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module.exports = app |