use base64x everywhere instead of encoding/base64.

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/btcsuite/btcd/btcec/v2 v2.3.4
 	github.com/btcsuite/btcd/btcutil v1.1.5
 	github.com/bytedance/sonic v1.12.10
+	github.com/cloudwego/base64x v0.1.5
 	github.com/coder/websocket v1.8.12
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0
 	github.com/dgraph-io/badger/v4 v4.5.0
@@ -51,7 +52,6 @@ require (
 	github.com/btcsuite/btcd/chaincfg/chainhash v1.1.0 // indirect
 	github.com/bytedance/sonic/loader v0.2.3 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/cloudwego/base64x v0.1.5 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/decred/dcrd/crypto/blake256 v1.1.0 // indirect
 	github.com/dgraph-io/ristretto/v2 v2.1.0 // indirect

nip04/nip04.go

@@ -5,12 +5,12 @@ import (
 	"crypto/aes"
 	"crypto/cipher"
 	"crypto/rand"
-	"encoding/base64"
 	"encoding/hex"
 	"fmt"
 	"strings"
 
 	"github.com/btcsuite/btcd/btcec/v2"
+	"github.com/cloudwego/base64x"
 )
 
 // ComputeSharedSecret returns a shared secret key used to encrypt messages.
@@ -70,7 +70,7 @@ func Encrypt(message string, key []byte) (string, error) {
 	ciphertext := make([]byte, len(paddedMsgBytes))
 	mode.CryptBlocks(ciphertext, paddedMsgBytes)
 
-	return base64.StdEncoding.EncodeToString(ciphertext) + "?iv=" + base64.StdEncoding.EncodeToString(iv), nil
+	return base64x.StdEncoding.EncodeToString(ciphertext) + "?iv=" + base64x.StdEncoding.EncodeToString(iv), nil
 }
 
 // Decrypt decrypts a content string using the shared secret key.
@@ -81,12 +81,12 @@ func Decrypt(content string, key []byte) (string, error) {
 		return "", fmt.Errorf("error parsing encrypted message: no initialization vector")
 	}
 
-	ciphertext, err := base64.StdEncoding.DecodeString(parts[0])
+	ciphertext, err := base64x.StdEncoding.DecodeString(parts[0])
 	if err != nil {
 		return "", fmt.Errorf("error decoding ciphertext from base64: %w", err)
 	}
 
-	iv, err := base64.StdEncoding.DecodeString(parts[1])
+	iv, err := base64x.StdEncoding.DecodeString(parts[1])
 	if err != nil {
 		return "", fmt.Errorf("error decoding iv from base64: %w", err)
 	}

nip44/nip44.go

@@ -5,7 +5,6 @@ import (
 	"crypto/hmac"
 	"crypto/rand"
 	"crypto/sha256"
-	"encoding/base64"
 	"encoding/binary"
 	"encoding/hex"
 	"fmt"
@@ -13,6 +12,7 @@ import (
 	"math"
 
 	"github.com/btcsuite/btcd/btcec/v2"
+	"github.com/cloudwego/base64x"
 	"github.com/decred/dcrd/dcrec/secp256k1/v4"
 	"golang.org/x/crypto/chacha20"
 	"golang.org/x/crypto/hkdf"
@@ -90,7 +90,7 @@ func Encrypt(plaintext string, conversationKey [32]byte, applyOptions ...func(op
 	copy(concat[1+32:], ciphertext)
 	copy(concat[1+32+len(ciphertext):], mac)
 
-	return base64.StdEncoding.EncodeToString(concat), nil
+	return base64x.StdEncoding.EncodeToString(concat), nil
 }
 
 func Decrypt(b64ciphertextWrapped string, conversationKey [32]byte) (string, error) {
@@ -102,7 +102,7 @@ func Decrypt(b64ciphertextWrapped string, conversationKey [32]byte) (string, err
 		return "", fmt.Errorf("unknown version")
 	}
 
-	decoded, err := base64.StdEncoding.DecodeString(b64ciphertextWrapped)
+	decoded, err := base64x.StdEncoding.DecodeString(b64ciphertextWrapped)
 	if err != nil {
 		return "", fmt.Errorf("invalid base64")
 	}

nip96/nip96.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"context"
 	"crypto/sha256"
-	"encoding/base64"
 	"encoding/hex"
 	"fmt"
 	"hash"
@@ -13,6 +12,7 @@ import (
 	"net/http"
 	"strconv"
 
+	"github.com/cloudwego/base64x"
 	jsoniter "github.com/json-iterator/go"
 	"github.com/nbd-wtf/go-nostr"
 )
@@ -131,7 +131,7 @@ func generateAuthHeader(sk, host string, fileHash hash.Hash) (string, error) {
 		return "", fmt.Errorf("json.Marshal: %w", err)
 	}
 
-	payload := base64.StdEncoding.EncodeToString(b)
+	payload := base64x.StdEncoding.EncodeToString(b)
 
 	return fmt.Sprintf("Nostr %s", payload), nil
 }

nipb0/blossom/http.go

@@ -2,12 +2,12 @@ package blossom
 
 import (
 	"context"
-	"encoding/base64"
 	"encoding/json"
 	"fmt"
 	"io"
 	"strconv"
 
+	"github.com/cloudwego/base64x"
 	"github.com/nbd-wtf/go-nostr"
 	"github.com/valyala/fasthttp"
 )
@@ -85,5 +85,5 @@ func (c *Client) authorizationHeader(
 	}
 
 	jevt, _ := json.Marshal(evt)
-	return "Nostr " + base64.StdEncoding.EncodeToString(jevt)
+	return "Nostr " + base64x.StdEncoding.EncodeToString(jevt)
 }