55 lines
1.5 KiB
JavaScript
55 lines
1.5 KiB
JavaScript
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import { CID } from 'multiformats/cid'
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import crypto from 'crypto'
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import * as json from 'multiformats/codecs/json'
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import * as hasher from 'multiformats/hashes/hasher'
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// ** Example 1: sha2-256 hasher **
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const sha256 = hasher.from({
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// As per multiformats table
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// https://github.com/multiformats/multicodec/blob/master/table.csv#L9
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name: 'sha2-256',
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code: 0x12,
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encode: (input) => new Uint8Array(crypto.createHash('sha256').update(input).digest())
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})
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async function run1 () {
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const hash = await sha256.digest(json.encode({ hello: 'world' }))
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const cid = CID.create(1, json.code, hash)
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console.log(cid.multihash.size) // should equal 32 bytes for sha256
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console.log(cid)
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// CID(bagaaierasords4njcts6vs7qvdjfcvgnume4hqohf65zsfguprqphs3icwea)
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}
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run1().catch((err) => {
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console.error(err)
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process.exit(1)
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})
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// ** Example 2: sha3-512 hasher **
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const sha512 = hasher.from({
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// As per multiformats table
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// https://github.com/multiformats/multicodec/blob/master/table.csv#L9
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name: 'sha3-512',
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code: 0x14,
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encode: (input) => new Uint8Array(crypto.createHash('sha512').update(input).digest())
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})
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async function run2 () {
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const hash2 = await sha512.digest(json.encode({ hello: 'world' }))
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const cid2 = CID.create(1, json.code, hash2)
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console.log(cid2.multihash.size) // should equal 64 bytes for sha512
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console.log(cid2)
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// CID(bagaaifca7d5wrebdi6rmqkgtrqyodq3bo6gitrqtemxtliymakwswbazbu7ai763747ljp7ycqfv7aqx4xlgiugcx62quo2te45pcgjbg4qjsvq)
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}
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run2().catch((err) => {
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console.error(err)
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process.exit(1)
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})
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