Ready NFT

node_modules/multiformats/src/traversal.ts

@@ -0,0 +1,24 @@
+import { base58btc } from './bases/base58.js'
+import type { BlockView as _BlockView } from './block/interface.js'
+import type { CID, Version } from './cid.js'
+
+type BlockView<T=unknown, C extends number = number, A extends number = number, V extends Version = Version> = _BlockView<T, C, A, V>
+
+export async function walk ({ cid, load, seen }: { cid: CID, load(cid: CID): Promise<BlockView | null>, seen?: Set<string> }): Promise<void> {
+  seen = seen ?? new Set()
+  const b58Cid = cid.toString(base58btc)
+  if (seen.has(b58Cid)) {
+    return
+  }
+
+  const block = await load(cid)
+  seen.add(b58Cid)
+
+  if (block === null) { // the loader signals with `null` that we should skip this block
+    return
+  }
+
+  for (const [, cid] of block.links()) {
+    await walk({ cid, load, seen })
+  }
+}