It's great to see active engagement, but there are some important points to clarify, especially for those who might be newer to the community or the platform.

Firstly, the main focus here is the Core Blockchain and its cryptocurrency, XCB (Core Coin). This thread is dedicated to discussing the technology, updates, and relevant news about the Core Blockchain itself. While Ping Exchange and other platforms that list XCB can be mentioned, they are not the primary topic. It's important to keep the distinction clear: Core Blockchain is an independent blockchain technology, and XCB is its native cryptocurrency. Exchanges like Ping Exchange are simply venues where XCB can be traded, not integral parts of the blockchain's infrastructure.

For those who may be new or less experienced on Bitcointalk, it's essential to understand the norms and expectations. This forum is a space for sharing accurate information, engaging in respectful discussions, and learning from one another. It's crucial to avoid spreading misinformation or making assumptions without sufficient knowledge. If you're uncertain about a topic, it's better to ask questions and seek clarification rather than making potentially misleading statements.

Moreover, maintaining a respectful tone is key. Engaging with others in a considerate and well-mannered way fosters a positive community atmosphere. It’s not uncommon for newcomers to mix up concepts or details, but it's also important to be open to correction and willing to learn. This community thrives on constructive and fact-based discussions, and everyone benefits from a clear and accurate exchange of ideas.

In summary, let's focus on the Core Blockchain and XCB as they pertain to this thread. Let's strive to share knowledge and insights while respecting each other’s perspectives. If you're new, don't hesitate to familiarize yourself with the platform's norms and continue participating in a manner that adds value to the discussion. This approach will help ensure that our conversations remain productive and informative for everyone involved.

This list is oriented to discover what code / system is behind exchanges and probably the frontend also.
You cannot find this information on internet at all.
Other informations is nice there also, but primary for the systems behind. IMHO This is important to know.

Please, send me more info about Nanex.

Good idea, I will link ID with Bitcointalk thread. You are welcome!

I will add next field, if it will be useful for other users. But this is primary for understanding, what is behind exchanges.
Nobody can answer it in many forums, then table will be useful.

Can you send me more information about Binance?

Please, send me full info. After I will add.

Here is the thread, please send me informations. I will update table.

https://bitcointalk.org/index.php?topic=3197653

	id	name	ver	doc	countries	Backend engine	Frontend engine
	_1broker	1Broker	2	API	US
	_1btcxe	1BTCXE	*	API	Panama
	acx	ACX	2	API	Australia
	allcoin	Allcoin	1	API	Canada
	anxpro	ANXPro	2	API	Japan, Singapore, Hong Kong, New Zealand
	bibox	Bibox	1	API	China, US, South Korea
	binance	Binance	*	API	Japan
	bit2c	Bit2C	*	API	Israel
	bitbank	bitbank	1	API	Japan
	bitbay	BitBay	*	API	Poland, EU
	bitcoincoid	Bitcoin.co.id	1.7	API	Indonesia
	bitfinex	Bitfinex	1	API	British Virgin Islands	undefined (Ruby)
	bitfinex2	Bitfinex v2	2	API	British Virgin Islands	undefined (Ruby)
	bitflyer	bitFlyer	1	API	Japan
	bithumb	Bithumb	*	API	South Korea
	bitlish	Bitlish	1	API	UK, EU, Russia
	bitmarket	BitMarket	*	API	Poland, EU
	bitmex	BitMEX	1	API	Seychelles
	bitso	Bitso	3	API	Mexico
	bitstamp	Bitstamp	2	API	UK
	bitstamp1	Bitstamp v1	1	API	UK
	bittrex	Bittrex	1.1	API	US	undefined (C#)
	bitz	Bit-Z	1	API	Hong Kong
	bl3p	BL3P	1	API	Netherlands, EU
	bleutrade	Bleutrade	2	API	Brazil
	braziliex	Braziliex	*	API	Brazil
	btcbox	BtcBox	1	API	Japan
	btcchina	BTCChina	1	API	China
	btcexchange	BTCExchange	*	API	Philippines
	btcmarkets	BTC Markets	*	API	Australia
	btctradeim	BtcTrade.im	*	API	Hong Kong
	btctradeua	BTC Trade UA	*	API	Ukraine
	btcturk	BTCTurk	*	API	Turkey
	btcx	BTCX	1	API	Iceland, US, EU
	bxinth	BX.in.th	*	API	Thailand
	ccex	C-CEX	*	API	Germany, EU
	cex	CEX.IO	*	API	UK, EU, Cyprus, Russia
	chbtc	CHBTC	1	API	China
	chilebit	ChileBit	1	API	Chile
	cobinhood	COBINHOOD	*	API	Taiwan
	coincheck	coincheck	*	API	Japan, Indonesia
	coinegg	CoinEgg	*	API	China, UK
	coinexchange	CoinExchange	*	API	India, Japan, South Korea, Vietnam, US
	coinfloor	coinfloor	*	API	UK
	coingi	Coingi	*	API	Panama, Bulgaria, China, US
	coinmarketcap	CoinMarketCap	1	API	US
	coinmate	CoinMate	*	API	UK, Czech Republic, EU
	coinsecure	Coinsecure	1	API	India
	coinspot	CoinSpot	*	API	Australia
	coolcoin	CoolCoin	*	API	Hong Kong
	cryptopia	Cryptopia	*	API	New Zealand
	dsx	DSX	3	API	UK
	ethfinex	Ethfinex	1	API	British Virgin Islands
	exmo	EXMO	1	API	Spain, Russia
	exx	EXX	*	API	China
	flowbtc	flowBTC	1	API	Brazil
	foxbit	FoxBit	1	API	Brazil
	fybse	FYB-SE	*	API	Sweden
	fybsg	FYB-SG	*	API	Singapore
	gatecoin	Gatecoin	*	API	Hong Kong
	gateio	Gate.io	2	API	China
	gdax	GDAX	*	API	US
	gemini	Gemini	1	API	US
	getbtc	GetBTC	*	API	St. Vincent & Grenadines, Russia
	hitbtc	HitBTC	1	API	UK
	hitbtc2	HitBTC v2	2	API	UK
	huobi	Huobi	3	API	China
	huobicny	Huobi CNY	1	API	China
	huobipro	Huobi Pro	1	API	China
	independentreserve	Independent Reserve	*	API	Australia, New Zealand
	itbit	itBit	1	API	US
	jubi	jubi.com	1	API	China
	kraken	Kraken	0	API	US
	kucoin	Kucoin	1	API	Hong Kong
	kuna	Kuna	2	API	Ukraine
	lakebtc	LakeBTC	2	API	US
	liqui	Liqui	3	API	Ukraine
	livecoin	LiveCoin	*	API	US, UK, Russia
	luno	luno	1	API	UK, Singapore, South Africa
	lykke	Lykke	1	API	Switzerland
	mercado	Mercado Bitcoin	3	API	Brazil
	mixcoins	MixCoins	1	API	UK, Hong Kong
	nova	Novaexchange	2	API	Tanzania
	okcoincny	OKCoin CNY	1	API	China
	okcoinusd	OKCoin USD	1	API	China, US
	okex	OKEX	1	API	China, US
	paymium	Paymium	1	API	France, EU
	poloniex	Poloniex	*	API	US
	qryptos	QRYPTOS	2	API	China, Taiwan
	quadrigacx	QuadrigaCX	2	API	Canada
	quoinex	QUOINEX	2	API	Japan, Singapore, Vietnam
	southxchange	SouthXchange	*	API	Argentina
	surbitcoin	SurBitcoin	1	API	Venezuela
	therock	TheRockTrading	1	API	Malta
	tidex	Tidex	3	API	UK
	urdubit	UrduBit	1	API	Pakistan
	vaultoro	Vaultoro	1	API	Switzerland
	vbtc	VBTC	1	API	Vietnam	Blinktrade	Blinktrade
	virwox	VirWoX	*	API	Austria, EU
	wex	WEX	3	API	New Zealand
	xbtce	xBTCe	1	API	Russia
	yobit	YoBit	3	API	Russia
	yunbi	YUNBI	2	API	China	Peatio	Peatio - Angular.js 1.x
	zaif	Zaif	1	API	Japan
	zb	ZB	1	API	China

Send me informations, I will update table.

You are quite true, there is system for frontend and backend.
I am interested in backend.
Should be some same engine, probably frontend and backend will be in one package.
Also true with the time, but the information about backend will be nice for community.
I will never start it without penetration testing.

Anyway I will just publish here for community.
Many people want to know what is engine behind.
Hope community will help me.

If I am honest, the time is problem.
Development from scratch is not good idea for my situation.
Seems nobody can answer my question.
Peatio is near the answer.

Probably if somebody can answer what is behind the exchanges, can be good help for me.
I can create some list, the exchanges I can know and rest we can solve together.

I will update this topic of that.

Thank you for answer.
I understood all risks of running exchange.

But cannot find the source with some links.
Probably links to some projects will be fine, which are not mentioned here.

Which is the best cryptocurrency exchange on the market? It can be one-time paid or open-source, no PHP projects, no outdated, no decentralised like forkdelta.

I found BlinkTrade, which seems work only with BlinkTrade API. https://blinktrade.com/

Peatio seems very hard to integration and outdated. https://github.com/peatio/peatio

Coinffeine, I am not checked this deeply. http://www.coinffeine.com/

ViaBTC have open the server, but not full code. https://github.com/viabtc/viabtc_exchange_server

Seems there is out some system, which are using many exchanges - like Bittrex, etc. Many seems very similiar. Can you maybe mention some exchange source, which you think is preatty good. I can pay for code as well with reasonable price.

Not really sure about 224 bytes...
I check right now some signed transactions and is it about 400 chars.
The best for "safe" reduce hex is base91 I think.
Then maybe is possible some parameters, which can be added after transmission.

Second option is entropy (https://en.wikipedia.org/wiki/Entropy_%28information_theory%29) for some parts of transaction. Not really sure about it.

For example in segwit:

01000000 version
0001 segwit flag (new)
01 number of inputs
fd461a7cf84bc4cae3427f25b547439910cce3fe0a6e86744d53bdc63e41a71900000000 input 1 txo id
00 input 1 dummy
ffffffff input 1 sequence/maturity lock
01 number of outputs
131cd90800000000 output 1 value
19 76a9141a0bde6a36b62dd42bb467e10c1217be277684bc88ac output 1 scriptPubKey
01 input 1 number of witness elements
6b 483045022100c30407ee492bf98c66b832ea22b78f02efc1b7925447d85b185c20f865afd399022 05ddae735daecd897abbb9d4d2c2820bdc45837301972a93fc2496cb07b0d629a012103fa91ab10 65b9730f795ea36fbc61117faf340ec35d663ddbe421236000fbeea8 input 1 witness 1
00000000 lock time

Put out version, lock time, etc...

Example segwit transaction:
0100000000010115e180dc28a2327e687facc33f10f2a20da717e5548406f7ae8b4c811072f8560 40000002322002001d5d92effa6ffba3efa379f9830d0f75618b13393827152d26e4309000e88b1 ffffffff0188b3f505000000001976a9141d7cd6c75c2e86f4cbf98eaed221b30bd9a0b92888ac0 2473044022038421164c6468c63dc7bf724aa9d48d8e5abe3935564d38182addf733ad4cd810220 76362326b22dd7bfaf211d5b17220723659e4fe3359740ced5762d0e497b7dcc012321038262a6c 6cec93c2d3ecd6c6072efea86d02ff8e3328bbd0242b20af3425990acac00000000

Is it 462 chars long

Hello all.

How short can be signed transaction in chars?
I have idea do it as short as possible, but don't know the formula.
Is there any function to make it shorter or delete unnecessary items?
Is Lightning transaction in same format?

Thank you

We plan do some L3+ and GPU mining (thinking about two currencies mine - in this case Claymore). But is there any alternative to mine tw currencies in same time and is it supported by Minera?

Do you offer custom development/support of Minera also?

Does Minera support Claymore's miner ( https://bitcointalk.org/index.php?topic=1433925.0 ) ?
And antminer L3+ ( https://shop.bitmain.com/productDetail.htm?pid=0002017041211583458538J49cKq063A ) ?

Hello Guys, I have one question, which cannot answer myself well.

For example Blackcoin. Or other PoS.
What will happens, when all coins are mined?

1. Who will own 51% technically?
2. What happens with annual interest?
3. What will have miners? Fee? Is possible calculate how much?

Is it possible test it with cloning?

Thanks.

For test purposes.

I want for test purposes premine 100% of Blackcoin clone.
What is the best way to do it?

Should I?
1. Setup easy difficulty / big reward
2. Build coin
3. Premine
4. Setup back the difficulty - for regular Blackcoin code
5. Build coin

Is here any tutorial or help?

Thank you.

Have you more information about this? Seems interesting if is it true.

I am try find the way have some part of money from transaction and rest send to address.
Not sure how it can be done.