# Some python code
# Create compressed public key from points
def point2compressed(x, y):
    if (y % 2 == 0):
        prefix = "02"
    else:
        prefix = "03"
    hx = hex(x)[2:].zfill(64)
    return prefix + hx

# create uncompressed public key from points
def point2uncompressed(x, y):
    hx = hex(x)[2:].zfill(64)
    hy = hex(y)[2:].zfill(64)
    return "04" + hx

#NOTE: code after this line is untested and probably broken

# public key to HASH160
from hashlib import sha256
import bytearray
def hash160(pubkey):
    #TODO This currently doesn't add the required prefix/suffix at the hash.
    hexkey = bytearray.fromhex(pubkey)
    h = sha256()
    h.update(hexkey)
    hash160 = h.digest()
    return hash160
   
#pip install base58
def legacy_address(hash160):
    #TODO

def nested_segwit_address(hash160):
    #TODO

#pip install bech32
def native_segwit_address(hash160):
    #TODO


#pip install requests
import requests
def has_balance(address):
    r = requests.get("https://api.blockchair.com/bitcoin/addresses?address={}".format(address))
    if r.status != 200:
       throw Exception("Got Status {} from Blockchair".format(r.status))
    return r.json()