From 09efbc30857defdc4c3894157b77e738981f044d Mon Sep 17 00:00:00 2001
From: Chris Duncan <chris@codecow.com>
Date: Mon, 18 May 2026 06:50:23 -0700
Subject: [PATCH] Extract cache update function.

---
 src/lib/ledger/cache.ts | 77 +++++++++++++++++++++--------------------
 src/lib/ledger/index.ts |  6 +---
 2 files changed, 40 insertions(+), 43 deletions(-)

diff --git a/src/lib/ledger/cache.ts b/src/lib/ledger/cache.ts
index fb32768..a58aadb 100644
--- a/src/lib/ledger/cache.ts
+++ b/src/lib/ledger/cache.ts
@@ -6,48 +6,49 @@ import { Account } from '../account'
 import { Block } from '../block'
 import { BIP44_COIN_NANO, BIP44_PURPOSE, HARDENED_OFFSET } from '../constants'
 import { bytes, dec, hex } from '../convert'
-import { queue } from './queue'
 
 export async function _cache (transport: LedgerTransport, index: number = 0, block: Block): Promise<LedgerResponse> {
-	return queue<LedgerResponse>(async () => {
-		try {
-			if (typeof index !== 'number' || index < 0 || index >= HARDENED_OFFSET) {
-				throw new TypeError('Invalid account index')
-			}
-			if (!(block instanceof Block)) {
-				throw new TypeError('Invalid block format')
-			}
-			if (!(block.link instanceof Uint8Array)) {
-				throw new TypeError('Invalid block link')
-			}
-			if (!(block.representative instanceof Account)) {
-				throw new TypeError('Invalid block link')
-			}
-			if (!block.signature) {
-				throw new ReferenceError('Cannot cache unsigned block')
-			}
+	try {
+		if (typeof index !== 'number' || index < 0 || index >= HARDENED_OFFSET) {
+			throw new TypeError('Invalid account index')
+		}
+		if (!(block instanceof Block)) {
+			throw new TypeError('Invalid block format')
+		}
+		if (!(block.link instanceof Uint8Array)) {
+			throw new TypeError('Invalid block link')
+		}
+		if (!(block.representative instanceof Account)) {
+			throw new TypeError('Invalid block link')
+		}
+		if (!block.signature) {
+			throw new ReferenceError('Cannot cache unsigned block')
+		}
 
-			const purpose = dec.toBytes(BIP44_PURPOSE + HARDENED_OFFSET, 4)
-			const coin = dec.toBytes(BIP44_COIN_NANO + HARDENED_OFFSET, 4)
-			const account = dec.toBytes(index + HARDENED_OFFSET, 4)
-			const previous = block.previous
-			const link = block.link
-			const representative = hex.toBytes(block.representative.publicKey, 32)
-			const balance = hex.toBytes(block.balance.toString(16), 16)
-			const signature = hex.toBytes(block.signature, 64)
-			const data = new Uint8Array([APDU_CODES.bip32DerivationLevel, ...purpose, ...coin, ...account, ...previous, ...link, ...representative, ...balance, ...signature])
+		const purpose = dec.toBytes(BIP44_PURPOSE + HARDENED_OFFSET, 4)
+		const coin = dec.toBytes(BIP44_COIN_NANO + HARDENED_OFFSET, 4)
+		const account = dec.toBytes(index + HARDENED_OFFSET, 4)
+		const previous = block.previous
+		const link = block.link
+		const representative = hex.toBytes(block.representative.publicKey, 32)
+		const balance = hex.toBytes(block.balance.toString(16), 16)
+		const signature = hex.toBytes(block.signature, 64)
+		const data = new Uint8Array([APDU_CODES.bip32DerivationLevel, ...purpose, ...coin, ...account, ...previous, ...link, ...representative, ...balance, ...signature])
 
-			const t = await transport.create(OPEN_TIMEOUT, LISTEN_TIMEOUT)
-			const response = await t
-				.send(APDU_CODES.class, APDU_CODES.cacheBlock, APDU_CODES.paramUnused, APDU_CODES.paramUnused, data as Buffer)
-				.then((res: Buffer) => bytes.toDec(res))
-				.catch((err: any) => err.statusCode)
-				.finally(async () => await t.close()) as number
+		const t = await transport.create(OPEN_TIMEOUT, LISTEN_TIMEOUT)
+		const response = await t
+			.send(APDU_CODES.class, APDU_CODES.cacheBlock, APDU_CODES.paramUnused, APDU_CODES.paramUnused, data as Buffer)
+			.then((res: Buffer) => bytes.toDec(res))
+			.catch((err: any) => err.statusCode)
+			.finally(async () => await t.close()) as number
 
-			return { status: STATUS_CODES[response] }
-		} catch (err: any) {
-			console.error('Ledger.#cacheBlock()', err)
-			return { status: err.message }
+		const status = STATUS_CODES[response]
+		if (status !== 'OK') {
+			throw new Error('failed to cache frontier block in ledger', { cause: status })
 		}
-	})
+		return { status }
+	} catch (err: any) {
+		console.error('Ledger cache()', err)
+		return { status: err.message }
+	}
 }
diff --git a/src/lib/ledger/index.ts b/src/lib/ledger/index.ts
index 969c75f..238fc18 100644
--- a/src/lib/ledger/index.ts
+++ b/src/lib/ledger/index.ts
@@ -279,11 +279,7 @@ export class Ledger {
 			}
 			input = res.contents
 		}
-		const { status } = await _cache(this.#transport, index, input)
-		if (status !== 'OK') {
-			throw new Error('failed to cache frontier block in ledger', { cause: status })
-		}
-		return { status }
+		return queue<LedgerResponse>(async () => _cache(this.#transport, index, input))
 	}
 
 	/**
-- 
2.47.3