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const base64Url = require("base64-url")
const crypto = require('crypto');
const header = base64Url.encode(JSON.stringify({alg: 'HS256', typ: 'JWT'}))
// eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9
const payload = base64Url.encode(JSON.stringify({message: 'Hello London'}))
// eyJtZXNzYWdlIjoiSGVsbG8gTG9uZG9uIn0
const content = `${header}.${payload}`
// eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJtZXNzYWdlIjoiSGVsbG8gTG9uZG9uIn0
const secret = 'I wanna ride my bicycle';
const rawSignature = crypto
.createHmac('sha256', secret)
.update(content)
.digest('base64')
const signature = base64Url.escape(rawSignature)
// dS1wlkIJH6k4KWuAAr9rRa5FmEBHu0kdjluCNdR2qyE
const jwt = `${content}.${signature}`
console.log(`jwt: ${jwt}`)
//eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJtZXNzYWdlIjoiSGVsbG8gTG9uZG9uIn0.dS1wlkIJH6k4KWuAAr9rRa5FmEBHu0kdjluCNdR2qyE
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