32 lines
1.1 KiB
JavaScript
32 lines
1.1 KiB
JavaScript
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import * as Block from 'multiformats/block'
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import * as codec from '@ipld/dag-cbor'
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import { sha256 as hasher } from 'multiformats/hashes/sha2'
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async function run () {
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const value = { hello: 'world' }
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// encode a block
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const block = await Block.encode({ value, codec, hasher })
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// block.value --> { hello: 'world' }
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// block.bytes --> Uint8Array
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// block.cid --> CID() w/ sha2-256 hash address and dag-cbor codec
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console.log('Example block CID: ' + block.cid.toString())
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// you can also decode blocks from their binary state
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const block2 = await Block.decode({ bytes: block.bytes, codec, hasher })
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// check for equivalency using cid interface
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console.log('Example block CID equal to decoded binary block: ' + block.cid.equals(block2.cid))
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// if you have the cid you can also verify the hash on decode
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const block3 = await Block.create({ bytes: block.bytes, cid: block.cid, codec, hasher })
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console.log('Example block CID equal to block created from CID + bytes: ' + block.cid.equals(block3.cid))
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}
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run().catch((err) => {
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console.error(err)
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process.exit(1)
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})
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