From 4fc493e6d8cc20137f920f8647e39fc5051bb245 Mon Sep 17 00:00:00 2001
From: bndw <ben@bdw.to>
Date: Sat, 14 Feb 2026 12:03:21 -0800
Subject: refactor: remove frivolous comments from auth validation/credentials

Also removed internal/nostr package - now using northwest.io/nostr library.
---
 internal/nostr/bech32.go | 162 -----------------------------------------------
 1 file changed, 162 deletions(-)
 delete mode 100644 internal/nostr/bech32.go

(limited to 'internal/nostr/bech32.go')

diff --git a/internal/nostr/bech32.go b/internal/nostr/bech32.go
deleted file mode 100644
index c8b1293..0000000
--- a/internal/nostr/bech32.go
+++ /dev/null
@@ -1,162 +0,0 @@
-package nostr
-
-import (
-	"fmt"
-	"strings"
-)
-
-// Bech32 encoding/decoding for NIP-19 (npub, nsec, note, etc.)
-// Implements BIP-173 bech32 encoding.
-
-const bech32Alphabet = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
-
-var bech32AlphabetMap [256]int8
-
-func init() {
-	for i := range bech32AlphabetMap {
-		bech32AlphabetMap[i] = -1
-	}
-	for i, c := range bech32Alphabet {
-		bech32AlphabetMap[c] = int8(i)
-	}
-}
-
-// bech32Polymod computes the BCH checksum.
-func bech32Polymod(values []int) int {
-	gen := []int{0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3}
-	chk := 1
-	for _, v := range values {
-		top := chk >> 25
-		chk = (chk&0x1ffffff)<<5 ^ v
-		for i := 0; i < 5; i++ {
-			if (top>>i)&1 == 1 {
-				chk ^= gen[i]
-			}
-		}
-	}
-	return chk
-}
-
-// bech32HRPExpand expands the human-readable part for checksum computation.
-func bech32HRPExpand(hrp string) []int {
-	result := make([]int, len(hrp)*2+1)
-	for i, c := range hrp {
-		result[i] = int(c) >> 5
-		result[i+len(hrp)+1] = int(c) & 31
-	}
-	return result
-}
-
-// bech32CreateChecksum creates the 6-character checksum.
-func bech32CreateChecksum(hrp string, data []int) []int {
-	values := append(bech32HRPExpand(hrp), data...)
-	values = append(values, []int{0, 0, 0, 0, 0, 0}...)
-	polymod := bech32Polymod(values) ^ 1
-	checksum := make([]int, 6)
-	for i := 0; i < 6; i++ {
-		checksum[i] = (polymod >> (5 * (5 - i))) & 31
-	}
-	return checksum
-}
-
-// bech32VerifyChecksum verifies the checksum of bech32 data.
-func bech32VerifyChecksum(hrp string, data []int) bool {
-	return bech32Polymod(append(bech32HRPExpand(hrp), data...)) == 1
-}
-
-// convertBits converts between bit groups.
-func convertBits(data []byte, fromBits, toBits int, pad bool) ([]int, error) {
-	acc := 0
-	bits := 0
-	result := make([]int, 0, len(data)*fromBits/toBits+1)
-	maxv := (1 << toBits) - 1
-
-	for _, value := range data {
-		acc = (acc << fromBits) | int(value)
-		bits += fromBits
-		for bits >= toBits {
-			bits -= toBits
-			result = append(result, (acc>>bits)&maxv)
-		}
-	}
-
-	if pad {
-		if bits > 0 {
-			result = append(result, (acc<<(toBits-bits))&maxv)
-		}
-	} else if bits >= fromBits || ((acc<<(toBits-bits))&maxv) != 0 {
-		return nil, fmt.Errorf("invalid padding")
-	}
-
-	return result, nil
-}
-
-// Bech32Encode encodes data with the given human-readable prefix.
-func Bech32Encode(hrp string, data []byte) (string, error) {
-	values, err := convertBits(data, 8, 5, true)
-	if err != nil {
-		return "", err
-	}
-
-	checksum := bech32CreateChecksum(hrp, values)
-	combined := append(values, checksum...)
-
-	var result strings.Builder
-	result.WriteString(hrp)
-	result.WriteByte('1')
-	for _, v := range combined {
-		result.WriteByte(bech32Alphabet[v])
-	}
-
-	return result.String(), nil
-}
-
-// Bech32Decode decodes a bech32 string, returning the HRP and data.
-func Bech32Decode(s string) (string, []byte, error) {
-	s = strings.ToLower(s)
-
-	pos := strings.LastIndexByte(s, '1')
-	if pos < 1 || pos+7 > len(s) {
-		return "", nil, fmt.Errorf("invalid bech32 string")
-	}
-
-	hrp := s[:pos]
-	dataStr := s[pos+1:]
-
-	data := make([]int, len(dataStr))
-	for i, c := range dataStr {
-		val := bech32AlphabetMap[c]
-		if val == -1 {
-			return "", nil, fmt.Errorf("invalid character: %c", c)
-		}
-		data[i] = int(val)
-	}
-
-	if !bech32VerifyChecksum(hrp, data) {
-		return "", nil, fmt.Errorf("invalid checksum")
-	}
-
-	// Remove checksum
-	data = data[:len(data)-6]
-
-	// Convert from 5-bit to 8-bit
-	result, err := convertBits(intSliceToBytes(data), 5, 8, false)
-	if err != nil {
-		return "", nil, err
-	}
-
-	bytes := make([]byte, len(result))
-	for i, v := range result {
-		bytes[i] = byte(v)
-	}
-
-	return hrp, bytes, nil
-}
-
-func intSliceToBytes(data []int) []byte {
-	result := make([]byte, len(data))
-	for i, v := range data {
-		result[i] = byte(v)
-	}
-	return result
-}
-- 
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