Ruby Quiz

Ruby Quiz - Challenge #8 - Base32 Alphabet - Convert the Super “Sekretoooo” 256-Bit CryptoKitties Genome to Kai Notation - Annipurrsary!

Annipurrsary! Let’s celebrate one year of CryptoKitties - yes, more than one million cute little cartoon cats on the blockchain.

Let’s convert the super “sekretoooo” kitty genome - that is, a 256-bit integer number where every 5-bit block is a gene - into the base32 (2^5=32) kai notation.

Q: What’s base32 kai notation?

Kai notation (named to honor Kai Turner who deciphered the kitties genome) is a base58 variant / subset for decoding the 256-bit integer into 5-bit blocks. Each 5-bit block is a gene with 32 possible traits. The 256-bit genome breaks down into 12 groups of 4 (x 5-bit) genes (that is, 12 x 4 x 5-bit = 240 bits) with the remaining leading 16 bits “unused” and zeroed-out (e.g. 0x0000). Example:

Kai	Binary	Num	Kai	Binary	Num	Kai	Binary	Num	Kai	Binary	Num
1	00000	0	9	01000	8	h	10000	16	q	11000	24
2	00001	1	a	01001	9	i	10001	17	r	11001	25
3	00010	2	b	01010	10	j	10010	18	s	11010	26
4	00011	3	c	01011	11	k	10011	19	t	11011	27
5	00100	4	d	01100	12	m	10100	20	u	11100	28
6	00101	5	e	01101	13	n	10101	21	v	11101	29
7	00110	6	f	01110	14	o	10110	22	w	11110	30
8	00111	7	g	01111	15	p	10111	23	x	11111	31

Note: The digit-0 and the letter-l are NOT used in kai.

Base58 is a group of binary-to-text encoding schemes used to represent large integers as alphanumeric text. It is similar to Base64 but has been modified to avoid both non-alphanumeric characters and letters which might look ambiguous when printed [e.g. 1 and l, 0 and o]. It is therefore designed for human users who manually enter the data, copying from some visual source, but also allows easy copy and paste because a double-click will usually select the whole string.

– Base58 @ Wikipedia

Let’s get coding, for an example:

# A 256-bit super "sekretoooo" integer genome

# hexadecimal (base 16)
genome = 0x00004a52931ce4085c14bdce014a0318846a0c808c60294a6314a34a1295b9ce
# decimal (base 10)
genome = 512955438081049600613224346938352058409509756310147795204209859701881294
# binary (base 2)
genome = 0b010010100101001010010011000111001110010000001000010111000001010010111101110011100000000101001010000000110001100010000100\
           011010100000110010000000100011000110000000101001010010100110001100010100101000110100101000010010100101011011100111001110

Let’s convert from decimal (base 10) to hexadecimal (base 16 - 2^4) and binary (base 2 that is, 0 and 1):

p genome    # printed as decimal (base 10) by default
# => 512955438081049600613224346938352058409509756310147795204209859701881294

p genome.to_s(16)
# => "4a52931ce4085c14bdce014a0318846a0c808c60294a6314a34a1295b9ce"

p genome.to_s(2)
# => "10010100101001010010011000111001110010000001000010111000001010010111101110011100000000101001010000000110001100010000100\
#     011010100000110010000000100011000110000000101001010010100110001100010100101000110100101000010010100101011011100111001110"

And finally:

kai = kai_encode( genome )   ## number to base32 kai notation
p kai
# => "aaaa788522f2agff16617755e979244166677664a9aacfff"

The challenge: Code a kai_encode method that passes the RubyQuizTest :-).

def kai_encode( num )
  # ...
end

For the starter level 1 turn super “sekretoooo” kitty genome 256-bit integer numbers into base 32 (2^5) kai notation.

For the bonus level 2 pretty print and format the base 32 (2^5) kai notation in groups of four e.g. turn:

"aaaa788522f2agff16617755e979244166677664a9aacfff"

into

"aaaa 7885 22f2 agff 1661 7755 e979 2441 6667 7664 a9aa cfff"

def kai_fmt( kai )
  # ...
end

Start from scratch or, yes, use any library / gem you can find.

To qualify for solving the code challenge / puzzle you must pass the test:

require 'minitest/autorun'

class RubyQuizTest < MiniTest::Test

  ################################
  # test data
  def genomes
   [
[0x00005ad2b318e6724ce4b9290146531884721ad18c63298a5308a55ad6b6b58d,
"ccac 7787 fa7f afaa 1646 7755 f9ee 4444 6766 7366 cccc eede"], ## kitty #1
[0x00004ad083188630c264a1280146021884618c818c6331ca728c425ad6b5b18e,
"ac99 7757 7427 a9a9 1641 5755 d779 4444 7868 6433 cccc cddf"], ## kitty #100
[0x00004a52931ce4085c14bdce014a0318846a0c808c60294a6314a34a1295b9ce,
"aaaa 7885 22f2 agff 1661 7755 e979 2441 6667 7664 a9aa cfff"], ## kitty #1001
[0x000042d28390864842e7b9c900c6321086438c6098ca298c728867425cf6b1ac,
"9ca9 8557 a22f gffa 1444 5557 9f77 277b 6778 6348 9afg eded"], ## kitty #1111
[0x00007918c42de87a96b49c8712d687bc6310cc223d6c081ee6a1ac50d8c3184f,
"g5dd 9cg9 gbcc a858 3cc9 gg44 3473 5gcd 21gf e9ed b4dd 773g"], ## kitty #1000001 
   ]
  end

  #############
  # tests
  def test_kai_encode
    genomes.each do |pair|
      num       = pair[0]
      exp_value = pair[1].gsub(' ','')   # note: remove spaces

      assert_equal exp_value, kai_encode( num )
    end
  end # method test_kai_encode

  def test_kai_fmt
    genomes.each do |pair|
      kai       = pair[1].gsub(' ','') # remove spaces
      exp_value = pair[1]

      assert_equal exp_value, kai_fmt( kai )
    end
  end # method test_kai_fmt

end # class RubyQuizTest

Post your code snippets on the “official” Ruby Quiz Channel, that is, the ruby-talk mailing list.

Happy data wrangling and genome genetics bits & bytes slicing with Ruby.

PS: Using a genes / traits chart you can now decipher the genome:

Fur (0-3) • Pattern (4-7) • Eye Color (8-11) • Eye Shape (12-15) • Base Color (16-19) • Highlight Color (20-23) • Accent Color (24-27) • Wild (28-31) • Mouth (32-35) • Environment (36-39) • Secret Y Gene (40-43) • Purrstige (44-47)

Fur (FU) - Genes 0-3

Kai	Code	Cattribute	Kai	Code	Cattribute
1	FU00	savannah	h	FU16	norwegianforest I
2	FU01	selkirk	i	FU17	mekong I
3	FU02	chantilly	j	FU18	highlander I
4	FU03	birman	k	FU19	balinese I
5	FU04	koladiviya	m	FU20	lynx I
6	FU05	bobtail	n	FU21	mainecoon I
7	FU06	manul	o	FU22	laperm I
8	FU07	pixiebob	p	FU23	persian I
9	FU08	siberian	q	FU24	fox II
a	FU09	cymric	r	FU25	kurilian II
b	FU10	chartreux	s	FU26	toyger II
c	FU11	himalayan	t	FU27	manx II
d	FU12	munchkin	u	FU28	lykoi III
e	FU13	sphynx	v	FU29	burmilla III
f	FU14	ragamuffin	w	FU30	liger IIII
g	FU15	ragdoll	x	FU31	?

Pattern (PA) - Genes 4-7

Kai	Code	Cattribute	Kai	Code	Cattribute
1	PA00	vigilante	h	PA16	splat I
2	PA01	tiger	i	PA17	thunderstruck I
3	PA02	rascal	j	PA18	dippedcone I
4	PA03	ganado	k	PA19	highsociety I
5	PA04	leopard	m	PA20	tigerpunk I
6	PA05	camo	n	PA21	henna I
7	PA06	rorschach	o	PA22	arcreactor I
8	PA07	spangled	p	PA23	totesbasic I
9	PA08	calicool	q	PA24	scorpius II
a	PA09	luckystripe	r	PA25	razzledazzle II
b	PA10	amur	s	PA26	hotrod II
c	PA11	jaguar	t	PA27	allyouneed II
d	PA12	spock	u	PA28	avatar III
e	PA13	mittens	v	PA29	gyre III
f	PA14	totesbasic	w	PA30	moonrise IIII
g	PA15	totesbasic	x	PA31	?

Eye Color (EC) - Genes 8-11

Kai	Code	Cattribute	Kai	Code	Cattribute
1	EC00	thundergrey	h	EC16	pumpkin I
2	EC01	gold	i	EC17	limegreen I
3	EC02	topaz	j	EC18	bridesmaid I
4	EC03	mintgreen	k	EC19	bubblegum I
5	EC04	isotope	m	EC20	twilightsparkle I
6	EC05	sizzurp	n	EC21	palejade I
7	EC06	chestnut	o	EC22	pinefresh I
8	EC07	strawberry	p	EC23	eclipse I
9	EC08	sapphire	q	EC24	babypuke II
a	EC09	forgetmenot	r	EC25	downbythebay II
b	EC10	dahlia	s	EC26	autumnmoon II
c	EC11	coralsunrise	t	EC27	oasis II
d	EC12	olive	u	EC28	gemini III
e	EC13	doridnudibranch	v	EC29	dioscuri III
f	EC14	parakeet	w	EC30	kaleidoscope IIII
g	EC15	cyan	x	EC31	?

Eye Shape (ES) - Genes 12-15

Kai	Code	Cattribute	Kai	Code	Cattribute
1	ES00	swarley	h	ES16	chameleon I
2	ES01	wonky	i	ES17	alien I
3	ES02	serpent	j	ES18	fabulous I
4	ES03	googly	k	ES19	raisedbrow I
5	ES04	otaku	m	ES20	tendertears I
6	ES05	simple	n	ES21	hacker I
7	ES06	crazy	o	ES22	sass I
8	ES07	thicccbrowz	p	ES23	sweetmeloncakes I
9	ES08	caffeine	q	ES24	oceanid II
a	ES09	wowza	r	ES25	wingtips II
b	ES10	baddate	s	ES26	firedup II
c	ES11	asif	t	ES27	buzzed II
d	ES12	chronic	u	ES28	bornwithit III
e	ES13	slyboots	v	ES29	candyshoppe III
f	ES14	wiley	w	ES30	drama IIII
g	ES15	stunned	x	ES31	?

Base Color (BC) - Genes 16-19

Kai	Code	Cattribute	Kai	Code	Cattribute
1	BC00	shadowgrey	h	BC16	cloudwhite I
2	BC01	salmon	i	BC17	cornflower I
3	BC02	meowgarine	j	BC18	oldlace I
4	BC03	orangesoda	k	BC19	koala I
5	BC04	cottoncandy	m	BC20	lavender I
6	BC05	mauveover	n	BC21	glacier I
7	BC06	aquamarine	o	BC22	redvelvet I
8	BC07	nachocheez	p	BC23	verdigris I
9	BC08	harbourfog	q	BC24	icicle II
a	BC09	cinderella	r	BC25	onyx II
b	BC10	greymatter	s	BC26	hyacinth II
c	BC11	tundra	t	BC27	martian II
d	BC12	brownies	u	BC28	hotcocoa III
e	BC13	dragonfruit	v	BC29	shamrock III
f	BC14	hintomint	w	BC30	firstblush IIII
g	BC15	bananacream	x	BC31	?

Highlight Color (HC) - Genes 20-23

Kai	Code	Cattribute	Kai	Code	Cattribute
1	HC00	cyborg	h	HC16	ooze I
2	HC01	springcrocus	i	HC17	safetyvest I
3	HC02	egyptiankohl	j	HC18	turtleback I
4	HC03	poisonberry	k	HC19	rosequartz I
5	HC04	lilac	m	HC20	wolfgrey I
6	HC05	apricot	n	HC21	cerulian I
7	HC06	royalpurple	o	HC22	skyblue I
8	HC07	padparadscha	p	HC23	garnet I
9	HC08	swampgreen	q	HC24	peppermint II
a	HC09	violet	r	HC25	universe II
b	HC10	scarlet	s	HC26	royalblue II
c	HC11	barkbrown	t	HC27	mertail II
d	HC12	coffee	u	HC28	inflatablepool III
e	HC13	lemonade	v	HC29	pearl III
f	HC14	chocolate	w	HC30	prairierose IIII
g	HC15	butterscotch	x	HC31	?

Accent Color (AC) - Genes 24-27

Kai	Code	Cattribute	Kai	Code	Cattribute
1	AC00	belleblue	h	AC16	daffodil I
2	AC01	sandalwood	i	AC17	flamingo I
3	AC02	peach	j	AC18	buttercup I
4	AC03	icy	k	AC19	bloodred I
5	AC04	granitegrey	m	AC20	atlantis I
6	AC05	cashewmilk	n	AC21	summerbonnet I
7	AC06	kittencream	o	AC22	periwinkle I
8	AC07	emeraldgreen	p	AC23	patrickstarfish I
9	AC08	kalahari	q	AC24	seafoam II
a	AC09	shale	r	AC25	cobalt II
b	AC10	purplehaze	s	AC26	mallowflower II
c	AC11	hanauma	t	AC27	mintmacaron II
d	AC12	azaleablush	u	AC28	sully III
e	AC13	missmuffett	v	AC29	fallspice III
f	AC14	morningglory	w	AC30	dreamboat IIII
g	AC15	frosting	x	AC31	?

Wild (WE) - Genes 28-31

Kai	Code	Cattribute	Kai	Code	Cattribute
1	WE00	?	h	WE16	littlefoot I
2	WE01	?	i	WE17	elk I
3	WE02	?	j	WE18	ducky I
4	WE03	?	k	WE19	trioculus I
5	WE04	?	m	WE20	daemonwings I
6	WE05	?	n	WE21	featherbrain I
7	WE06	?	o	WE22	flapflap I
8	WE07	?	p	WE23	daemonhorns I
9	WE08	?	q	WE24	dragontail II
a	WE09	?	r	WE25	aflutter II
b	WE10	?	s	WE26	foghornpawhorn II
c	WE11	?	t	WE27	unicorn II
d	WE12	?	u	WE28	dragonwings III
e	WE13	?	v	WE29	alicorn III
f	WE14	?	w	WE30	wyrm IIII
g	WE15	?	x	WE31	?

Mouth (MO) - Genes 32-35

Kai	Code	Cattribute	Kai	Code	Cattribute
1	MO00	whixtensions	h	MO16	cheeky I
2	MO01	wasntme	i	MO17	starstruck I
3	MO02	wuvme	j	MO18	samwise I
4	MO03	gerbil	k	MO19	ruhroh I
5	MO04	confuzzled	m	MO20	dali I
6	MO05	impish	n	MO21	grimace I
7	MO06	belch	o	MO22	majestic I
8	MO07	rollercoaster	p	MO23	tongue I
9	MO08	beard	q	MO24	yokel II
a	MO09	pouty	r	MO25	topoftheworld II
b	MO10	saycheese	s	MO26	neckbeard II
c	MO11	grim	t	MO27	satiated II
d	MO12	fangtastic	u	MO28	walrus III
e	MO13	moue	v	MO29	struck III
f	MO14	happygokitty	w	MO30	delite IIII
g	MO15	soserious	x	MO31	?

Environment (EN) - Genes 36-39

Kai	Code	Cattribute	Kai	Code	Cattribute
1	EN00	?	h	EN16	salty I
2	EN01	?	i	EN17	dune I
3	EN02	?	j	EN18	juju I
4	EN03	?	k	EN19	tinybox I
5	EN04	?	m	EN20	myparade I
6	EN05	?	n	EN21	finalfrontier I
7	EN06	?	o	EN22	metime I
8	EN07	?	p	EN23	drift I
9	EN08	?	q	EN24	secretgarden II
a	EN09	?	r	EN25	frozen II
b	EN10	?	s	EN26	roadtogold II
c	EN11	?	t	EN27	jacked II
d	EN12	?	u	EN28	floorislava III
e	EN13	?	v	EN29	prism III
f	EN14	?	w	EN30	junglebook IIII
g	EN15	?	x	EN31	?

Secret Y Gene (SE) - Genes 40-43

Kai	Code	Cattribute	Kai	Code	Cattribute
1	SE00	?	h	SE16	?
2	SE01	?	i	SE17	?
3	SE02	?	j	SE18	?
4	SE03	?	k	SE19	?
5	SE04	?	m	SE20	?
6	SE05	?	n	SE21	?
7	SE06	?	o	SE22	?
8	SE07	?	p	SE23	?
9	SE08	?	q	SE24	?
a	SE09	?	r	SE25	?
b	SE10	?	s	SE26	?
c	SE11	?	t	SE27	?
d	SE12	?	u	SE28	?
e	SE13	?	v	SE29	?
f	SE14	?	w	SE30	?
g	SE15	?	x	SE31	?

Purrstige (PU) - Genes 44-47

Kai	Code	Cattribute	Kai	Code	Cattribute
1	PU00	?	h	PU16	?
2	PU01	?	i	PU17	?
3	PU02	?	j	PU18	?
4	PU03	?	k	PU19	?
5	PU04	?	m	PU20	?
6	PU05	?	n	PU21	?
7	PU06	?	o	PU22	?
8	PU07	?	p	PU23	?
9	PU08	?	q	PU24	?
a	PU09	?	r	PU25	?
b	PU10	?	s	PU26	?
c	PU11	?	t	PU27	?
d	PU12	?	u	PU28	?
e	PU13	?	v	PU29	?
f	PU14	?	w	PU30	?
g	PU15	?	x	PU31	?

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