Merge pull request #80 from Artemis-xyz/alw_add_base58_related_udfs

adding base58-related udfs

udfs/base58_udfs.sql

@@ -0,0 +1,115 @@
+CREATE OR REPLACE FUNCTION HEX_TO_BASE58("HEX_STRING" VARCHAR(16777216))
+RETURNS VARCHAR(16777216)
+LANGUAGE PYTHON
+RUNTIME_VERSION = '3.8'
+HANDLER = 'hex_to_base58'
+AS '
+def hex_to_base58(hex_string):
+    alphabet = ''123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz''
+
+    num = 0
+
+    if(hex_string != ''''):
+        num = int(hex_string, 16)
+
+    if num == 0:
+        return ''1''
+
+    base58 = ''''
+    while num > 0:
+        num, rem = divmod(num, 58)
+        base58 = alphabet[rem] + base58
+
+    return base58
+';
+
+CREATE OR REPLACE FUNCTION BASE58_TO_DECIMAL("ENCODED_STR" VARCHAR(16777216))
+RETURNS NUMBER(38,0)
+LANGUAGE PYTHON
+RUNTIME_VERSION = '3.8'
+HANDLER = 'base58_to_decimal'
+AS '
+def base58_to_decimal(encoded_str):
+
+    def big_endian_to_little_endian(hex_num):
+        big = bytearray.fromhex(hex_num)
+        big.reverse()
+        little = ''''.join(f"{n:02X}" for n in big)
+        return little
+
+    base58_alphabet = ''123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz''
+
+    # Decode base58 string to integer
+    num = 0
+    for char in encoded_str:
+        num *= 58
+        if char not in base58_alphabet:
+            raise ValueError("Invalid character in base58 string")
+        num += base58_alphabet.index(char)
+
+    # Convert integer to hex
+    hex_str = hex(num)[2:]  # [2:] to strip the ''0x'' prefix
+
+    # Ensure the hex string has even length
+    if len(hex_str) % 2:
+        hex_str = ''0'' + hex_str
+
+    big_endian = hex_str[16:22]
+
+    little_endian = big_endian_to_little_endian(big_endian)
+
+    num = int(little_endian, 16)
+
+    return num
+';
+
+CREATE OR REPLACE FUNCTION BASE58_TO_HEX("ENCODED_STR" VARCHAR(16777216))
+RETURNS VARCHAR(16777216)
+LANGUAGE PYTHON
+RUNTIME_VERSION = '3.8'
+HANDLER = 'base58_to_hex'
+AS '
+def base58_to_hex(encoded_str):
+
+    base58_alphabet = ''123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz''
+    hex_str = ""
+    # Decode base58 string to integer
+    num = 0
+    if(encoded_str is not None):
+        for char in encoded_str:
+                num *= 58
+                if char not in base58_alphabet:
+                    raise ValueError("Invalid character in base58 string")
+                num += base58_alphabet.index(char)
+
+    # Convert integer to hex
+    hex_str = hex(num)[2:]  # [2:] to strip the ''0x'' prefix
+
+    # Ensure the hex string has even length
+    if len(hex_str) % 2:
+        hex_str = ''0'' + hex_str
+
+    return hex_str
+';
+
+CREATE OR REPLACE FUNCTION PC_DBT_DB.PROD.BIG_ENDIAN_HEX_TO_DECIMAL("BIG_ENDIAN" VARCHAR(16777216))
+RETURNS NUMBER(38,0)
+LANGUAGE PYTHON
+RUNTIME_VERSION = '3.8'
+HANDLER = 'big_endian_hex_to_decimal'
+AS '
+def big_endian_hex_to_decimal(big_endian):
+
+    def big_endian_to_little_endian(hex_num):
+        big = bytearray.fromhex(hex_num)
+        big.reverse()
+        little = ''''.join(f"{n:02X}" for n in big)
+        return little
+
+
+    little_endian = big_endian_to_little_endian(big_endian)
+
+    num = int(little_endian, 16)
+
+    return num
+';