diff --git a/vendor/go.opentelemetry.io/otel/trace/tracestate.go b/vendor/go.opentelemetry.io/otel/trace/tracestate.go
new file mode 100644
index 0000000..dc5e34c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace/tracestate.go
@@ -0,0 +1,330 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/trace"
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+const (
+	maxListMembers = 32
+
+	listDelimiters  = ","
+	memberDelimiter = "="
+
+	errInvalidKey    errorConst = "invalid tracestate key"
+	errInvalidValue  errorConst = "invalid tracestate value"
+	errInvalidMember errorConst = "invalid tracestate list-member"
+	errMemberNumber  errorConst = "too many list-members in tracestate"
+	errDuplicate     errorConst = "duplicate list-member in tracestate"
+)
+
+type member struct {
+	Key   string
+	Value string
+}
+
+// according to (chr = %x20 / (nblk-char = %x21-2B / %x2D-3C / %x3E-7E) )
+// means (chr = %x20-2B / %x2D-3C / %x3E-7E) .
+func checkValueChar(v byte) bool {
+	return v >= '\x20' && v <= '\x7e' && v != '\x2c' && v != '\x3d'
+}
+
+// according to (nblk-chr = %x21-2B / %x2D-3C / %x3E-7E) .
+func checkValueLast(v byte) bool {
+	return v >= '\x21' && v <= '\x7e' && v != '\x2c' && v != '\x3d'
+}
+
+// based on the W3C Trace Context specification
+//
+//	value    = (0*255(chr)) nblk-chr
+//	nblk-chr = %x21-2B / %x2D-3C / %x3E-7E
+//	chr      = %x20 / nblk-chr
+//
+// see https://www.w3.org/TR/trace-context-1/#value
+func checkValue(val string) bool {
+	n := len(val)
+	if n == 0 || n > 256 {
+		return false
+	}
+	for i := 0; i < n-1; i++ {
+		if !checkValueChar(val[i]) {
+			return false
+		}
+	}
+	return checkValueLast(val[n-1])
+}
+
+func checkKeyRemain(key string) bool {
+	// ( lcalpha / DIGIT / "_" / "-"/ "*" / "/" )
+	for _, v := range key {
+		if isAlphaNum(byte(v)) {
+			continue
+		}
+		switch v {
+		case '_', '-', '*', '/':
+			continue
+		}
+		return false
+	}
+	return true
+}
+
+// according to
+//
+//	simple-key = lcalpha (0*255( lcalpha / DIGIT / "_" / "-"/ "*" / "/" ))
+//	system-id = lcalpha (0*13( lcalpha / DIGIT / "_" / "-"/ "*" / "/" ))
+//
+// param n is remain part length, should be 255 in simple-key or 13 in system-id.
+func checkKeyPart(key string, n int) bool {
+	if len(key) == 0 {
+		return false
+	}
+	first := key[0] // key's first char
+	ret := len(key[1:]) <= n
+	ret = ret && first >= 'a' && first <= 'z'
+	return ret && checkKeyRemain(key[1:])
+}
+
+func isAlphaNum(c byte) bool {
+	if c >= 'a' && c <= 'z' {
+		return true
+	}
+	return c >= '0' && c <= '9'
+}
+
+// according to
+//
+//	tenant-id = ( lcalpha / DIGIT ) 0*240( lcalpha / DIGIT / "_" / "-"/ "*" / "/" )
+//
+// param n is remain part length, should be 240 exactly.
+func checkKeyTenant(key string, n int) bool {
+	if len(key) == 0 {
+		return false
+	}
+	return isAlphaNum(key[0]) && len(key[1:]) <= n && checkKeyRemain(key[1:])
+}
+
+// based on the W3C Trace Context specification
+//
+//	key = simple-key / multi-tenant-key
+//	simple-key = lcalpha (0*255( lcalpha / DIGIT / "_" / "-"/ "*" / "/" ))
+//	multi-tenant-key = tenant-id "@" system-id
+//	tenant-id = ( lcalpha / DIGIT ) (0*240( lcalpha / DIGIT / "_" / "-"/ "*" / "/" ))
+//	system-id = lcalpha (0*13( lcalpha / DIGIT / "_" / "-"/ "*" / "/" ))
+//	lcalpha    = %x61-7A ; a-z
+//
+// see https://www.w3.org/TR/trace-context-1/#tracestate-header.
+func checkKey(key string) bool {
+	tenant, system, ok := strings.Cut(key, "@")
+	if !ok {
+		return checkKeyPart(key, 255)
+	}
+	return checkKeyTenant(tenant, 240) && checkKeyPart(system, 13)
+}
+
+func newMember(key, value string) (member, error) {
+	if !checkKey(key) {
+		return member{}, errInvalidKey
+	}
+	if !checkValue(value) {
+		return member{}, errInvalidValue
+	}
+	return member{Key: key, Value: value}, nil
+}
+
+func parseMember(m string) (member, error) {
+	key, val, ok := strings.Cut(m, memberDelimiter)
+	if !ok {
+		return member{}, fmt.Errorf("%w: %s", errInvalidMember, m)
+	}
+	key = strings.TrimLeft(key, " \t")
+	val = strings.TrimRight(val, " \t")
+	result, e := newMember(key, val)
+	if e != nil {
+		return member{}, fmt.Errorf("%w: %s", errInvalidMember, m)
+	}
+	return result, nil
+}
+
+// String encodes member into a string compliant with the W3C Trace Context
+// specification.
+func (m member) String() string {
+	return m.Key + "=" + m.Value
+}
+
+// TraceState provides additional vendor-specific trace identification
+// information across different distributed tracing systems. It represents an
+// immutable list consisting of key/value pairs, each pair is referred to as a
+// list-member.
+//
+// TraceState conforms to the W3C Trace Context specification
+// (https://www.w3.org/TR/trace-context-1). All operations that create or copy
+// a TraceState do so by validating all input and will only produce TraceState
+// that conform to the specification. Specifically, this means that all
+// list-member's key/value pairs are valid, no duplicate list-members exist,
+// and the maximum number of list-members (32) is not exceeded.
+type TraceState struct { //nolint:revive // revive complains about stutter of `trace.TraceState`
+	// list is the members in order.
+	list []member
+}
+
+var _ json.Marshaler = TraceState{}
+
+// ParseTraceState attempts to decode a TraceState from the passed
+// string. It returns an error if the input is invalid according to the W3C
+// Trace Context specification.
+func ParseTraceState(ts string) (TraceState, error) {
+	if ts == "" {
+		return TraceState{}, nil
+	}
+
+	wrapErr := func(err error) error {
+		return fmt.Errorf("failed to parse tracestate: %w", err)
+	}
+
+	var members []member
+	found := make(map[string]struct{})
+	for ts != "" {
+		var memberStr string
+		memberStr, ts, _ = strings.Cut(ts, listDelimiters)
+		if len(memberStr) == 0 {
+			continue
+		}
+
+		m, err := parseMember(memberStr)
+		if err != nil {
+			return TraceState{}, wrapErr(err)
+		}
+
+		if _, ok := found[m.Key]; ok {
+			return TraceState{}, wrapErr(errDuplicate)
+		}
+		found[m.Key] = struct{}{}
+
+		members = append(members, m)
+		if n := len(members); n > maxListMembers {
+			return TraceState{}, wrapErr(errMemberNumber)
+		}
+	}
+
+	return TraceState{list: members}, nil
+}
+
+// MarshalJSON marshals the TraceState into JSON.
+func (ts TraceState) MarshalJSON() ([]byte, error) {
+	return json.Marshal(ts.String())
+}
+
+// String encodes the TraceState into a string compliant with the W3C
+// Trace Context specification. The returned string will be invalid if the
+// TraceState contains any invalid members.
+func (ts TraceState) String() string {
+	if len(ts.list) == 0 {
+		return ""
+	}
+	var n int
+	n += len(ts.list)     // member delimiters: '='
+	n += len(ts.list) - 1 // list delimiters: ','
+	for _, mem := range ts.list {
+		n += len(mem.Key)
+		n += len(mem.Value)
+	}
+
+	var sb strings.Builder
+	sb.Grow(n)
+	_, _ = sb.WriteString(ts.list[0].Key)
+	_ = sb.WriteByte('=')
+	_, _ = sb.WriteString(ts.list[0].Value)
+	for i := 1; i < len(ts.list); i++ {
+		_ = sb.WriteByte(listDelimiters[0])
+		_, _ = sb.WriteString(ts.list[i].Key)
+		_ = sb.WriteByte('=')
+		_, _ = sb.WriteString(ts.list[i].Value)
+	}
+	return sb.String()
+}
+
+// Get returns the value paired with key from the corresponding TraceState
+// list-member if it exists, otherwise an empty string is returned.
+func (ts TraceState) Get(key string) string {
+	for _, member := range ts.list {
+		if member.Key == key {
+			return member.Value
+		}
+	}
+
+	return ""
+}
+
+// Walk walks all key value pairs in the TraceState by calling f
+// Iteration stops if f returns false.
+func (ts TraceState) Walk(f func(key, value string) bool) {
+	for _, m := range ts.list {
+		if !f(m.Key, m.Value) {
+			break
+		}
+	}
+}
+
+// Insert adds a new list-member defined by the key/value pair to the
+// TraceState. If a list-member already exists for the given key, that
+// list-member's value is updated. The new or updated list-member is always
+// moved to the beginning of the TraceState as specified by the W3C Trace
+// Context specification.
+//
+// If key or value are invalid according to the W3C Trace Context
+// specification an error is returned with the original TraceState.
+//
+// If adding a new list-member means the TraceState would have more members
+// then is allowed, the new list-member will be inserted and the right-most
+// list-member will be dropped in the returned TraceState.
+func (ts TraceState) Insert(key, value string) (TraceState, error) {
+	m, err := newMember(key, value)
+	if err != nil {
+		return ts, err
+	}
+	n := len(ts.list)
+	found := n
+	for i := range ts.list {
+		if ts.list[i].Key == key {
+			found = i
+		}
+	}
+	cTS := TraceState{}
+	if found == n && n < maxListMembers {
+		cTS.list = make([]member, n+1)
+	} else {
+		cTS.list = make([]member, n)
+	}
+	cTS.list[0] = m
+	// When the number of members exceeds capacity, drop the "right-most".
+	copy(cTS.list[1:], ts.list[0:found])
+	if found < n {
+		copy(cTS.list[1+found:], ts.list[found+1:])
+	}
+	return cTS, nil
+}
+
+// Delete returns a copy of the TraceState with the list-member identified by
+// key removed.
+func (ts TraceState) Delete(key string) TraceState {
+	members := make([]member, ts.Len())
+	copy(members, ts.list)
+	for i, member := range ts.list {
+		if member.Key == key {
+			members = append(members[:i], members[i+1:]...)
+			// TraceState should contain no duplicate members.
+			break
+		}
+	}
+	return TraceState{list: members}
+}
+
+// Len returns the number of list-members in the TraceState.
+func (ts TraceState) Len() int {
+	return len(ts.list)
+}