refactor: tighten protocol amount helpers

src/lnurlcash/fees.ts

@@ -22,7 +22,7 @@ import {
   grossUpForMintFee,
   mintAddressUrl,
   resolveMintInput,
-  serverOf
+  serverOf,
 } from 'lnurlcash-kit'
 import type {LnurlcashOptions, MintFee} from 'lnurlcash-kit'
 import {ceilMsatToSat, floorMsatToSat} from './units'
@@ -55,7 +55,7 @@ export const clearMintFeeQuoteCache = (): void => quoteCache.clear()
 // reached right now.
 export const quoteMintFee = async (
   mintInput: string,
-  options: LnurlcashOptions = {}
+  options: LnurlcashOptions = {},
 ): Promise<MintFee | null> => {
   const url = resolveMintInput(mintInput)
   if (!url) return null
@@ -69,8 +69,9 @@ export const quoteMintFee = async (
   if (addressUrl) {
     try {
       payUrl = (await fetchMintAddress(addressUrl, opts)).payLink
-    } catch {
+    } catch (error) {
       // no mint-address support - the plain payRequest guess still works
+      if (!(error instanceof Error)) throw error
     }
   }
   let fee: MintFee | null

src/lnurlcash/units.ts

@@ -5,14 +5,12 @@ export const MSAT_PER_SAT = 1000
 
 export const msatToSats = (msat: number): number => msat / MSAT_PER_SAT
 
-export const satsToMsat = (sats: number): number =>
-  Math.round(sats * MSAT_PER_SAT)
+export const satsToMsat = (sats: number): number => Math.round(sats * MSAT_PER_SAT)
 
 // rounds up to the next whole sat - for an msat amount about to be
 // requested as an invoice, where sub-sat precision (e.g. from a mint fee's
 // percentage cut, see grossUpForMintFee) isn't reliably payable
-export const ceilMsatToSat = (msat: number): number =>
-  Math.ceil(msat / MSAT_PER_SAT) * MSAT_PER_SAT
+export const ceilMsatToSat = (msat: number): number => Math.ceil(msat / MSAT_PER_SAT) * MSAT_PER_SAT
 
 // rounds down to the nearest whole sat - for a fee-adjusted amount shown
 // as an upper bound: rounding up there would advertise a note value that