replaced x/text/cases with our own impl.

blockchain/claimtrie.go

@@ -13,6 +13,7 @@ import (
 	"github.com/btcsuite/btcd/claimtrie"
 	"github.com/btcsuite/btcd/claimtrie/change"
 	"github.com/btcsuite/btcd/claimtrie/node"
+	"github.com/btcsuite/btcd/claimtrie/normalization"
 )
 
 func (b *BlockChain) SetClaimtrieHeader(block *btcutil.Block, view *UtxoViewpoint) error {
@@ -94,11 +95,11 @@ func (h *handler) handleTxIns(ct *claimtrie.ClaimTrie) error {
 		switch cs.Opcode() {
 		case txscript.OP_CLAIMNAME: // OP code from previous transaction
 			id = change.NewClaimID(op) // claimID of the previous item now being spent
-			h.spent[id.Key()] = node.NormalizeIfNecessary(name, ct.Height())
+			h.spent[id.Key()] = normalization.NormalizeIfNecessary(name, ct.Height())
 			err = ct.SpendClaim(name, op, id)
 		case txscript.OP_UPDATECLAIM:
 			copy(id[:], cs.ClaimID())
-			h.spent[id.Key()] = node.NormalizeIfNecessary(name, ct.Height())
+			h.spent[id.Key()] = normalization.NormalizeIfNecessary(name, ct.Height())
 			err = ct.SpendClaim(name, op, id)
 		case txscript.OP_SUPPORTCLAIM:
 			copy(id[:], cs.ClaimID())
@@ -138,7 +139,7 @@ func (h *handler) handleTxOuts(ct *claimtrie.ClaimTrie) error {
 			// that was a safety feature, but it should have rejected the transaction instead
 			// TODO: reject transactions with invalid update commands
 			copy(id[:], cs.ClaimID())
-			normName := node.NormalizeIfNecessary(name, ct.Height())
+			normName := normalization.NormalizeIfNecessary(name, ct.Height())
 			if !bytes.Equal(h.spent[id.Key()], normName) {
 				node.LogOnce(fmt.Sprintf("Invalid update operation: name or ID mismatch at %d for: %s, %s",
 					ct.Height(), normName, id.String()))
@@ -164,7 +165,7 @@ func (b *BlockChain) GetNamesChangedInBlock(height int32) ([]string, error) {
 
 func (b *BlockChain) GetClaimsForName(height int32, name string) (string, *node.Node, error) {
 
-	normalizedName := node.NormalizeIfNecessary([]byte(name), height)
+	normalizedName := normalization.NormalizeIfNecessary([]byte(name), height)
 
 	b.chainLock.RLock()
 	defer b.chainLock.RUnlock()

claimtrie/claimtrie.go

@@ -18,6 +18,7 @@ import (
 	"github.com/btcsuite/btcd/claimtrie/merkletrie/merkletrierepo"
 	"github.com/btcsuite/btcd/claimtrie/node"
 	"github.com/btcsuite/btcd/claimtrie/node/noderepo"
+	"github.com/btcsuite/btcd/claimtrie/normalization"
 	"github.com/btcsuite/btcd/claimtrie/param"
 	"github.com/btcsuite/btcd/claimtrie/temporal"
 	"github.com/btcsuite/btcd/claimtrie/temporal/temporalrepo"
@@ -250,7 +251,7 @@ func (ct *ClaimTrie) AppendBlock() error {
 			continue
 		}
 
-		newName := node.NormalizeIfNecessary(nhn.Name, nhn.Next)
+		newName := normalization.NormalizeIfNecessary(nhn.Name, nhn.Next)
 		updateNames = append(updateNames, newName)
 		updateHeights = append(updateHeights, nhn.Next)
 	}

claimtrie/node/normalizing_manager.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 
 	"github.com/btcsuite/btcd/claimtrie/change"
+	"github.com/btcsuite/btcd/claimtrie/normalization"
 	"github.com/btcsuite/btcd/claimtrie/param"
 )
 
@@ -20,7 +21,7 @@ func NewNormalizingManager(baseManager Manager) Manager {
 }
 
 func (nm *NormalizingManager) AppendChange(chg change.Change) {
-	chg.Name = NormalizeIfNecessary(chg.Name, chg.Height)
+	chg.Name = normalization.NormalizeIfNecessary(chg.Name, chg.Height)
 	nm.Manager.AppendChange(chg)
 }
 
@@ -54,7 +55,7 @@ func (nm *NormalizingManager) addNormalizationForkChangesIfNecessary(height int3
 	// the original code had an unfortunate bug where many unnecessary takeovers
 	// were triggered at the normalization fork
 	predicate := func(name []byte) bool {
-		norm := Normalize(name)
+		norm := normalization.Normalize(name)
 		eq := bytes.Equal(name, norm)
 		if eq {
 			return true

claimtrie/normalization/case_folder.go

@@ -0,0 +1,52 @@
+package normalization
+
+import (
+	"bytes"
+	_ "embed"
+	"regexp"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+)
+
+//go:embed CaseFolding_v11.txt
+var v11 string
+
+var foldMap map[rune][]rune
+
+func init() {
+	foldMap = map[rune][]rune{}
+	r, _ := regexp.Compile(`([[:xdigit:]]+?); (.); ([[:xdigit:] ]+?);`)
+	matches := r.FindAllStringSubmatch(v11, 1000000000)
+	for i := range matches {
+		if matches[i][2] == "C" || matches[i][2] == "F" {
+			key, _ := strconv.Unquote(`"\u` + matches[i][1] + `"`)
+			splits := strings.Split(matches[i][3], " ")
+			var values []rune
+			for j := range splits {
+				value, _ := strconv.Unquote(`"\u` + splits[j] + `"`)
+				values = append(values, []rune(value)[0])
+			}
+			foldMap[[]rune(key)[0]] = values
+		}
+	}
+}
+
+func CaseFold(name []byte) []byte {
+	var b bytes.Buffer
+	b.Grow(len(name))
+	for _, r := range string(name) {
+		if r == utf8.RuneError {
+			return name
+		}
+		replacements := foldMap[r]
+		if len(replacements) > 0 {
+			for j := range replacements {
+				b.WriteRune(replacements[j])
+			}
+		} else {
+			b.WriteRune(r)
+		}
+	}
+	return b.Bytes()
+}

claimtrie/normalization/normalizer.go

@@ -1,17 +1,10 @@
-package node
+package normalization
 
 import (
 	"github.com/btcsuite/btcd/claimtrie/param"
-	"golang.org/x/text/cases"
 	"golang.org/x/text/unicode/norm"
 )
 
-//func init() {
-//	if cases.UnicodeVersion[:2] != "11" {
-//		panic("Wrong unicode version!")
-//	}
-//}
-
 var Normalize = normalizeGo
 
 func NormalizeIfNecessary(name []byte, height int32) []byte {
@@ -21,10 +14,9 @@ func NormalizeIfNecessary(name []byte, height int32) []byte {
 	return Normalize(name)
 }
 
-var folder = cases.Fold()
-
 func normalizeGo(value []byte) []byte {
 
-	normalized := norm.NFD.Bytes(value)
-	return folder.Bytes(normalized)
+	normalized := norm.NFD.Bytes(value) // may need to hard-code the version on this
+	// not using x/text/cases because it does too good of a job; it seems to use v14 tables even when it claims v13
+	return CaseFold(normalized)
 }

claimtrie/normalization/normalizer_icu.go

@@ -1,6 +1,6 @@
 // +build use_icu_normalization
 
-package node
+package normalization
 
 // #cgo CFLAGS: -O2
 // #cgo LDFLAGS: -licuio -licui18n -licuuc -licudata

claimtrie/normalization/normalizer_icu_test.go

@@ -1,6 +1,6 @@
 // +build use_icu_normalization
 
-package node
+package normalization
 
 import (
 	"github.com/stretchr/testify/assert"

claimtrie/normalization/normalizer_test.go

@@ -1,4 +1,4 @@
-package node
+package normalization
 
 import (
 	"math/rand"

rpcclaimtrie.go

@@ -9,6 +9,7 @@ import (
 	"github.com/btcsuite/btcd/btcjson"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/claimtrie/node"
+	"github.com/btcsuite/btcd/claimtrie/normalization"
 	"github.com/btcsuite/btcd/database"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
@@ -336,7 +337,7 @@ func lookupValue(s *rpcServer, outpoint wire.OutPoint, includeValues *bool) (str
 func handleGetNormalized(_ *rpcServer, cmd interface{}, _ <-chan struct{}) (interface{}, error) {
 	c := cmd.(*btcjson.GetNormalizedCmd)
 	r := btcjson.GetNormalizedResult{
-		NormalizedName: string(node.Normalize([]byte(c.Name))),
+		NormalizedName: string(normalization.Normalize([]byte(c.Name))),
 	}
 	return r, nil
 }