Blockchain : Block chain couponing & promo code etc, market?
I am wondering what blockchain based companies or there that or effecting the redemption of the following
(and do the have apis available?)
What is the Blockchain?
A block chain is a transaction database shared by all nodes participating in a system based on the Bitcoin protocol. A full copy of a currency’s block chain contains every transaction ever executed in the currency. With this information, one can find out how much value belonged to each address at any point in history.
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