44 lines
1.3 KiB
JavaScript
44 lines
1.3 KiB
JavaScript
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import { base58btc } from './bases/base58.js'
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/**
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* @template [C=number] - multicodec code corresponding to codec used to encode the block
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* @template [A=number] - multicodec code corresponding to the hashing algorithm used in CID creation.
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* @template [V=0|1] - CID version
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* @typedef {import('./cid').CID<unknown, C, A, V>} CID
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*/
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/**
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* @template [T=unknown] - Logical type of the data encoded in the block
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* @template [C=number] - multicodec code corresponding to codec used to encode the block
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* @template [A=number] - multicodec code corresponding to the hashing algorithm used in CID creation.
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* @template [V=0|1] - CID version
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* @typedef {import('./block/interface.js').BlockView<T, C, A, V>} BlockView
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*/
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/**
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* @param {object} options
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* @param {CID} options.cid
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* @param {(cid: CID) => Promise<BlockView|null>} options.load
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* @param {Set<string>} [options.seen]
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*/
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const walk = async ({ cid, load, seen }) => {
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seen = seen || new Set()
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const b58Cid = cid.toString(base58btc)
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if (seen.has(b58Cid)) {
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return
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}
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const block = await load(cid)
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seen.add(b58Cid)
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if (block === null) { // the loader signals with `null` that we should skip this block
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return
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}
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for (const [, cid] of block.links()) {
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await walk({ cid, load, seen })
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}
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}
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export { walk }
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