chia 0.5.1

Utility functions and types used by the Chia blockchain full node
Documentation 
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#!/usr/bin/env python3

import os
from clvm import KEYWORD_TO_ATOM

def recursive_cons(filename, num):
    with open(filename, 'w+') as f:
        f.write('''
;(mod (N)
;    (defun prepend (V N)
;        (if N (c V (prepend V (- N 1) V)) ())
;    )
;    (prepend 1337 N)
;)

(a (q 2 2 (c 2 (c (q . 1337) (c 5 ())))) (c (q 2 (i 11 (q 4 5 (a 2 (c 2 (c 5 (c (- 11 (q . 1)) (c 5 ())))))) ()) 1) 1))
''')

    with open(filename[:-4] + 'env', 'w+') as f:
        f.write('(%d)' % num)

def many_args(filename, op, num):
    with open(filename + '-precompiled', 'w+') as f:
        f.write('''
;(mod (n)
;    (defun large-atom (n)
;        (if n (lsh (large-atom (- n 1)) 65535) 0x80)
;    )
;    (defun raise (atom)
;        (%s atom ... )
;    )
;    (raise (large-atom n))
;)
''' % op)

        f.write('(a (q 2 6 (c 2 (c (a 4 (c 2 (c 5 (q)))) (q)))) (c (q (a (i 5 (q 23 (a 4 (c 2 (c (- 5 (q . 1)) (q)))) (q . 0x00ffff)) (q 1 . -128)) 1) %s' % op)
        f.write(' 5' * num)
        f.write(') 1))')

    with open(filename[:-4] + 'env', 'w+') as f:
        f.write('(500)')

    if op.startswith('0x'):
        hexop = op[2:]
        if len(hexop) % 2 != 0: hexop = '0' + hexop
        if len(hexop) > 2 or hexop[0] in 'fec8':
            # in this case we need a length prefix for the atom
            hexop = '8%x' % (len(hexop) // 2) + hexop
    else:
        hexop = KEYWORD_TO_ATOM[op].hex()

    with open(filename[:-4] + 'hex', 'w+') as f:
        f.write('ff02ffff01ff02ff06ffff04ff02ffff04ffff02ff04ffff04ff02ffff04ff05ffff'
            '0180808080ffff0180808080ffff04ffff01ffff02ffff03ff05ffff01ff17ffff02'
            'ff04ffff04ff02ffff04ffff11ff05ffff010180ffff0180808080ffff018300ffff'
            '80ffff01ff01818080ff0180ff' + hexop +
            ('ff05' * num) + '80ff018080')

def many_args_point(filename, op, num):
    with open(filename, 'w+') as f:
        f.write(''';(mod (n)
;    (defun raise (atom)
;        (%s atom atom atom atom atom atom atom atom atom atom atom atom atom atom)
;    )
;    (raise (logxor n 0xb3b8ac537f4fd6bde9b26221d49b54b17a506be147347dae5d081c0a6572b611d8484e338f3432971a9823976c6a232b))
;)
''' % op)
        f.write('(a (q 2 2 (c 2 (c (logxor 5 (q . 0xb3b8ac537f4fd6bde9b26221d49b54b17a506be147347dae5d081c0a6572b611d8484e338f3432971a9823976c6a232b)) (q)))) (c (q %s' % op)
        f.write(' 5' * num)
        f.write(') 1)))')

    with open(filename[:-4] + 'env', 'w+') as f:
        f.write('(0)')

def softfork_wrap(filename, val):

    with open(filename, 'w+') as f:
        f.write(''';(mod (n)
;    (defun recurse (count)
;        (if (= 0 count) 42 (recurse (+ (- count 1) (softfork %s))))
;    )
;    (recurse n)
;)

(a (q 2 2 (c 2 (c 5 (q)))) (c (q 2 (i (= (q) 5) (q 1 . 42) (q 2 2 (c 2 (c (+ (- 5 (q . 1)) (softfork (q . %s))) (q))))) 1) 1))
''' % (val, val))

    with open(filename[:-4] + 'env', 'w+') as f:
        f.write('(0xffffffff)')

def binary_recurse(filename, op, val, count):

    with open(filename, 'w+') as f:
        f.write('''; (mod (N)
;   (defun iter (V N)
;     (if (= N 0) V (iter ({op} V V) (- N 1)))
;   )
;   (iter {val} N)
; )
(a (q 2 2 (c 2 (c (q . {val}) (c 5 ())))) (c (q 2 (i (= 11 ()) (q . 5) (q 2 2 (c 2 (c ({op} 5 5) (c (- 11 (q . 1)) ()))))) 1) 1))
'''.format(op=op, val=val))

    with open(filename[:-4] + 'env', 'w+') as f:
        f.write(f'({count})')

def unary_recurse(filename, op, second, count):

    if second != '':
        quoted_second = f' (q . {second})'
    else:
        quoted_second = ''

    with open(filename, 'w+') as f:
        f.write('''; (mod (N)
;   (defun large-atom (n)
;       (if n (lsh (large-atom (- n 1)) 65535) 0x80)
;   )
;   (defun iter (V N)
;     (if (= N 0) V (iter ({op} V {second}) (- N 1)))
;   )
;   (iter (large-atom 6) N)
; )
(a (q 2 4 (c 2 (c (a 6 (c 2 (q 6))) (c 5 ())))) (c (q (a (i (= 11 ()) (q . 5) (q 2 4 (c 2 (c ({op} 5 {quoted_second}) (c (- 11 (q . 1)) ()))))) 1) 2 (i 5 (q 23 (a 6 (c 2 (c (- 5 (q . 1)) ()))) (q . 0x00ffff)) (q 1 . -128)) 1) 1))
'''.format(op=op, second=second, quoted_second=quoted_second))

    with open(filename[:-4] + 'env', 'w+') as f:
        f.write(f'({count})')

def serialized_atom_overflow(filename, size):
    with open(filename, 'w+') as f:
        if size == 0:
            size_blob = b"\x80"
        elif size < 0x40:
            size_blob = bytes([0x80 | size])
        elif size < 0x2000:
            size_blob = bytes([0xc0 | (size >> 8), (size >> 0) & 0xff])
        elif size < 0x100000:
            size_blob = bytes([0xe0 | (size >> 16), (size >> 8) & 0xff, (size >> 0) & 0xFF])
        elif size < 0x8000000:
            size_blob = bytes(
            [
                0xF0 | (size >> 24),
                (size >> 16) & 0xff,
                (size >> 8) & 0xff,
                (size >> 0) & 0xff,
            ]
        )
        elif size < 0x400000000:
            size_blob = bytes(
                [
                    0xF8 | (size >> 32),
                    (size >> 24) & 0xff,
                    (size >> 16) & 0xff,
                    (size >> 8) & 0xff,
                    (size >> 0) & 0xff,
                ]
            )
        else:
            size_blob = bytes(
                [
                    0xfc | ((size >> 40) & 0xff),
                    (size >> 32) & 0xff,
                    (size >> 24) & 0xff,
                    (size >> 16) & 0xff,
                    (size >> 8) & 0xff,
                    (size >> 0) & 0xff,
                ]
            )
        f.write(size_blob.hex())
        f.write("01" * 1000)

try:
    os.mkdir('programs')
except:
    pass

binary_recurse('programs/recursive-cat.clvm', 'concat', '"ABCDEF"', 29)
binary_recurse('programs/recursive-mul.clvm', '*', '0x7ffffffffffffffffffffffffffffffffffffffffffff', 100)
binary_recurse('programs/recursive-add.clvm', '+', '0x7ffffffffffffffffffffffffffffffffffffffffffffffff', 5000000)
binary_recurse('programs/recursive-sub.clvm', '-', '0x7ffffffffffffffffffffffffffffffffffffffffffffffff', 5000000)
unary_recurse('programs/recursive-div.clvm', '/', 13, 1000000)
unary_recurse('programs/recursive-lsh.clvm', 'lsh', 65535, 10000)
unary_recurse('programs/recursive-ash.clvm', 'ash', 65535, 10000)
unary_recurse('programs/recursive-pubkey.clvm', 'pubkey_for_exp', '', 10000)
unary_recurse('programs/recursive-not.clvm', 'lognot', '', 10000000)
many_args('programs/args-mul.clvm', '*', 10000)
many_args('programs/args-add.clvm', '+', 10000)
many_args('programs/args-sub.clvm', '-', 10000)
many_args('programs/args-sha.clvm', 'sha256', 10000)
many_args('programs/args-cat.clvm', 'concat', 10000)
many_args('programs/args-any.clvm', 'any', 300000)
many_args('programs/args-all.clvm', 'all', 300000)
many_args('programs/args-and.clvm', 'logand', 10000)
many_args('programs/args-or.clvm', 'logior', 10000)
many_args('programs/args-xor.clvm', 'logxor', 10000)
many_args_point('programs/args-point_add.clvm', 'point_add', 12000)
many_args('programs/args-unknown-1.clvm', '0x7fffffff00', 5000)
many_args('programs/args-unknown-2.clvm', '0x7ff40', 3000)
many_args('programs/args-unknown-3.clvm', '0x7ff80', 3000)
many_args('programs/args-unknown-4.clvm', '0x7ffc0', 3000)
unary_recurse('programs/args-unknown-5.clvm', '0x7ff00', '0xffffffffffffff', 3000000)
unary_recurse('programs/args-unknown-6.clvm', '0x001', '0xfffffffffffff', 30000000)
unary_recurse('programs/args-unknown-7.clvm', '0x041', '0xfffffffffffff', 30000000)
unary_recurse('programs/args-unknown-8.clvm', '0x081', '0xfffffffffffff', 30000000)
unary_recurse('programs/args-unknown-9.clvm', '0x0c1', '0xfffffffffffff', 30000000)
recursive_cons('programs/recursive-cons.clvm', 10000000)

# this program attempts to wrap around a 64 bit cost counter
softfork_wrap('programs/softfork-1.clvm', '0x00ffffffffffffff45')
# this program attempts to wrap around a 32 bit cost counter
softfork_wrap('programs/softfork-2.clvm', '0x00ffffff45')

# tests that try to trick a parser into allocating too much memory
serialized_atom_overflow('programs/large-atom-1.hex.invalid', 0xffffffff)
serialized_atom_overflow('programs/large-atom-2.hex.invalid', 0x3ffffffff)
serialized_atom_overflow('programs/large-atom-3.hex.invalid', 0xffffffffff)
serialized_atom_overflow('programs/large-atom-4.hex.invalid', 0x1ffffffffff)