让各个编码转换的方法 (b58_to_hex, hex_to_b32, ...) 在错误情况下返回 '' 而不是 null。不知道会不会导致其它地方的问题。

ticc.js

@@ -976,6 +976,17 @@ class TicCrypto {
     return text
   }
 
+  static randomize_hex ({ length = 64 } = {}) {
+    // 长度为 length 的随机 hex 字符串。注意 randomBytes 在一些环境里可能不存在，例如在 HBuilderX 的内置浏览器里。
+    if (crypto.randomBytes) {
+      return crypto
+        .randomBytes(Math.ceil(length / 2))
+        .toString('hex')
+        .slice(0, length)
+    }
+    return this.randomize_string({ length, alphabet: '0123456789abcdef' })
+  }
+
   /**
    * 生成随机的数字
    *
@@ -1275,7 +1286,7 @@ class TicCrypto {
     try {
       return bs58check.encode(Buffer.from(hex, 'hex'))
     } catch (exception) {
-      return null
+      return ''
     }
   }
 
@@ -1283,7 +1294,7 @@ class TicCrypto {
     try {
       return bs58.encode(Buffer.from(hex, 'hex'))
     } catch (exception) {
-      return null
+      return ''
     }
   }
 
@@ -1299,7 +1310,7 @@ class TicCrypto {
     try {
       return bs58check.decode(box).toString('hex')
     } catch (exception) {
-      return null
+      return ''
     }
   }
 
@@ -1307,7 +1318,7 @@ class TicCrypto {
     try {
       return bs58.decode(box).toString('hex')
     } catch (exception) {
-      return null
+      return ''
     }
   }
 
@@ -1336,10 +1347,10 @@ class TicCrypto {
    * @memberof TicCrypto
    */
   static hex_to_b64t (hex) {
-    if (/^[0-9a-fA-F]+$/.test(hex)) {
+    if (my.REGEXP_ALPHABET.hex.test(hex)) {
       return this.b64_to_b64t(Buffer.from(hex, 'hex').toString('base64'))
     }
-    return null
+    return ''
   }
 
   /**
@@ -1354,33 +1365,33 @@ class TicCrypto {
     if (/^[0-9a-zA-Z\._]+$/.test(b64t)) {
       return Buffer.from(this.b64t_to_b64(b64t), 'base64').toString('hex')
     }
-    return null
+    return ''
   }
 
   // https://en.wikipedia.org/wiki/Base32
   static hex_to_b32 (hex) {
-    if (/^[0-9a-fA-F]+$/.test(hex)) {
+    if (my.REGEXP_ALPHABET.hex.test(hex)) {
       return base32encode(Buffer.from(hex, 'hex'), 'RFC4648')
     }
-    return null
+    return ''
   }
   static b32_to_hex (b32) {
-    if (/^[A-Za-z2-7=]+$/.test(b32)) {
+    if (my.REGEXP_ALPHABET.b32.test(b32)) {
       return Buffer.from(base32decode(b32.toUpperCase(), 'RFC4648')).toString('hex')
     }
-    return null
+    return ''
   }
   static hex_to_b32h (hex) {
-    if (/^[0-9a-fA-F]+$/.test(hex)) {
+    if (my.REGEXP_ALPHABET.hex.test(hex)) {
       return base32encode(Buffer.from(hex, 'hex'), 'RFC4648-HEX')
     }
-    return null
+    return ''
   }
   static b32h_to_hex (b32h) {
-    if (/^[0-9A-Va-v=]+$/.test(b32h)) {
+    if (my.REGEXP_ALPHABET.b32h.test(b32h)) {
       return Buffer.from(base32decode(b32.toUpperCase(), 'RFC4648-HEX')).toString('hex')
     }
-    return null
+    return ''
   }
 
   /**
@@ -1405,7 +1416,7 @@ class TicCrypto {
       }
       return result
     }
-    return null
+    return ''
   }
 
   /**
@@ -1430,7 +1441,7 @@ class TicCrypto {
     if (this.decompress_pubkey(compressed) === uncompressed) {
       return compressed
     }
-    return null // 非压缩公钥有错误。
+    return '' // 非压缩公钥有错误。
   }
 
   /**
@@ -1562,29 +1573,62 @@ class TicCrypto {
       ripemd160: '1053',
       md5: 'd5',
     }
-    if (cidVersion === 0) {
-      return this.hex_to_b58(`${multialgo[cidAlgo]}${Number(cosh.length / 2).toString(16)}${cosh}`)
-    } else if (cidVersion === 1) {
-      const fullHex = `01${multicodec[cidCodec]}${multialgo[cidAlgo]}${Number(cosh.length / 2).toString(16)}${cosh}`
-      let converted = ''
-      if (cidBase === 'b16') {
-        converted = fullHex.toLowerCase()
-      } else if (cidBase === 'B16') {
-        converted = fullHex.toUpperCase()
-      } else if (cidBase === 'b32') {
-        converted = this.hex_to_b32(fullHex).toLowerCase().replace(/=/g, '')
-      } else if (cidBase === 'B32') {
-        converted = this.hex_to_b32(fullHex).toUpperCase().replace(/=/g, '')
-      } else if (cidBase === 'b58') {
-        converted = this.hex_to_b58(fullHex)
-      } else if (cidBase === 'b64p') {
-        converted = Buffer.from(fullHex, 'hex').toString('base64')
-      } else if (cidBase === 'b64') {
-        converted = Buffer.from(fullHex, 'hex').toString('base64').replace(/=/g, '')
-      } else if (cidBase === 'b10') {
-        converted = BigInt('0x' + fullHex).toString()
+    try {
+      if (cidVersion === 0) {
+        return this.hex_to_b58(`${multialgo[cidAlgo]}${Number(cosh.length / 2).toString(16)}${cosh}`)
+      } else if (cidVersion === 1) {
+        const fullHex = `01${multicodec[cidCodec]}${multialgo[cidAlgo]}${Number(cosh.length / 2).toString(16)}${cosh}`
+        let converted = ''
+        if (cidBase === 'b16') {
+          converted = fullHex.toLowerCase()
+        } else if (cidBase === 'B16') {
+          converted = fullHex.toUpperCase()
+        } else if (cidBase === 'b32') {
+          converted = this.hex_to_b32(fullHex)?.toLowerCase?.()?.replace?.(/=/g, '')
+        } else if (cidBase === 'B32') {
+          converted = this.hex_to_b32(fullHex)?.toUpperCase?.()?.replace?.(/=/g, '')
+        } else if (cidBase === 'b58') {
+          converted = this.hex_to_b58(fullHex)
+        } else if (cidBase === 'b64p') {
+          converted = Buffer.from(fullHex, 'hex').toString('base64')
+        } else if (cidBase === 'b64') {
+          converted = Buffer.from(fullHex, 'hex').toString('base64').replace(/=/g, '')
+        } else if (cidBase === 'b10') {
+          converted = BigInt('0x' + fullHex).toString()
+        }
+        if (converted) {
+          return multibase[cidBase] + converted
+        } else {
+          return ''
+        }
       }
-      return multibase[cidBase] + converted
+    } catch {
+      return ''
+    }
+  }
+
+  static convert_pexid (key) {
+    key = key.toLowerCase()
+    let pextokenCid, pextokenCosh, nftToid
+    if (key.length < 64 && /^bafkrei/.test(key)) {
+      pextokenCid = key
+      pextokenCosh = this.cid_to_cosh({ cid: pextokenCid })
+      nftToid = BigInt('0x' + pextokenCosh).toString()
+    } else if (key.length > 64 && /^\d+$/.test(key)) {
+      nftToid = key
+      pextokenCosh = BigInt(nftToid).toString(16)
+      pextokenCid = this.cosh_to_cid({ cosh: pextokenCosh })
+    } else if (/^[0-9a-f]{64}$/.test(key)) {
+      pextokenCosh = key
+      pextokenCid = this.cosh_to_cid({ cosh: pextokenCosh })
+      nftToid = BigInt('0x' + pextokenCosh).toString()
+    }
+    const tokenURI = 'https://ipfs.tic.cc/ipfs/f01551220' + pextokenCosh
+    return {
+      pextokenCid,
+      pextokenCosh,
+      nftToid,
+      tokenURI,
     }
   }
 }