Hello friends of steemit, on this occasion I want to introduce you to a community-based organization, which includes an innovative decentralized platform for processing and payment services in real time in the global market called Graft Blockchain.

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GraftBlockchain covers a wide variety of use cases of credit and debit card payments. It allows merchants to accept small payments and avoid centralization with the usual banking and government institutions, with the intention of avoiding resorting to corrupt societies; in addition to preventing consumers from falling into the banking monopoly that includes large usurious interest rates in the balance of credit cards. Opening a door beyond the border political boundaries. It facilitates free transaction trading all over the world.

This technology would be of great impact around the world since Graft frees us from centralized payment systems, opening a new universe of possibilities at low prices, we speak of blockchain-based payments that will lead to a system in the same way as centralized ones in the sense of credit / debit payment, fundamentally improved by means of the combination of lower transaction fees, with extremely strict privacy domains, offering low rates on credit balances and additional connected services.

By belonging to Graft Blockchain we obtain additional services such as:

• Merchants who join GRAFT acquire lower tariff payments, and therefore generate lower preserves that benefit consumers.

• Allows merchants to offer more services.

• Consumers and suppliers will benefit from administrative costs and transaction processing notoriously and representatively lower

• Provides a higher security index, since we avoid the use of cash and transactions with bank cards, by using cryptocurrencies we avoid physical crime.

Functioning.

GRAFT NETWORK ECO-SYSTEM

GRAFT Network requires and invites participation from many parties in order to be fully functional on a global level. These network participants are represented both functionally and geographically, as a whole creating a network capable of executing any type of a cashless transaction anywhere, at a minimum cost to the merchant!

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REAL-TIME AUTHORIZATION PROVIDERS:

Type of SuperNode required: Complete SuperNode

Hardware / systems requirement:

It contains minimum hardware requirements; Dual-core CPU with 8 GB of RAM. The supernode must be accessible directly from the Internet (public IP), preferably with low latency, with a high-speed network connection.

Functionality: real-time authorizations

Setting out requirement: it has four levels of supernodes based on the set-up amounts, with a fair rate distribution between the 4 levels.

Incentive: Supernode owners charge fees for instant authorizations (approximately ⅛ 0.5% of the transaction amount).

Steps: Authorization providers only have to install the SuperNode and connect it to the stakeout wallet.

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SUPPLIERS OF COMMERCIAL PAYMENT PROCESSING SERVICES:

If you want to be a provider of commercial payment processing services you should consider the following:

These providers could be associated with the SuperNode Proxy host or with the Proxy or Full SuperNode servers, these are the types of nodes required to be used as a "cppsp" (commercial payment processing service provider).

The hardware requirements, you need a high availability architecture for your supernodes of which there are different types, you can choose the one of your prediction.

The function of commercial service providers is to provide a "gateway" service support for merchants, managing configuration, maintenance and ensuring network uptime.

Stake Requirement: It must be taken into account that technically, a Commercial Services Provider does not have to bet or compete, but if the service provider chooses to host the complete SuperNodes that also grant authorizations, they will have associated staking requirements, everything varies according to to the needs of the Commercial Services Provider.

Incentive and benefit of being a provider: commercial service providers can generate their particular transaction fees together with network fees and / or have separate financial agreements with the merchant. They can also distribute or rent payment terminals.

Steps: Configure the complete Proxy or SuperNode infrastructure (or reach an agreement with the partner that will handle the technical operations part), define the business model (transaction fees, service rates, hardware distribution, etc.), select the endpoint strategy (payment terminals vs. POS mobile solution / wallet), configure the endpoint for your SuperNode (s) as a gateway.

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If you are a merchant and you want to explore with GRAFT BLOCKCHAIN ​​you must comply with this profile.

MERCHANTS

Type of SuperNode required: NONE

Hardware / Systems Requirement: Merchants have several options when it comes to enabling GRAFT Network payments at their location: First enable the existing payment terminal that they are using (assuming it is a compatible model) with GRAFT as the payment method alternative. To do this, they must download the GRAFT application from the market of the corresponding payment terminal (the graft support staff is actively working in support for Verifone and Ingenico). In this way, a merchant could use the same terminal to accept traditional and encrypted payments. Then configure a separate terminal specifically to handle cryptocurrency payments. Use GRAFT POS if you do not yet have a POS terminal / payment configuration or would like to initiate or switch exclusively to payments through the GRAFT network.

Functionality A merchant can undertake to accept cryptocurrencies in their businesses without the need to change processes, software or train their staff. The merchant may also keep the funds in cryptocurrencies or obtain an instant or intermittent fiduciary payment.

Setting out requirement: no stakeout is required for the merchant, however, there are situations such as accepting offline payments that may need to run a SuperNode with a stakeout wallet in the point of sale system.

Incentive: the merchant can diversify his customer base, appealing to the demographics of the crypto-owner. The merchant acquires the ability to have a single payment processor for multiple locations, both online and offline. Finally, the merchant can consolidate his reports, accounting and facilitate the distribution of funds.

Steps: The merchant should contact the commercial service provider to configure it, or they can be installed on the GRAFT network by downloading and running the GRAFT POS application or installing and configuring the GRAFT payment terminal application (in case they also need later) either to host your own proxy supernode or find a SuperNode proxy provider)

A whole universe of possibilities for the merchant.

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GRAFT CARDS ARE SAFE

Most exchanges recently disconnected all CryptoNote portfolios (including Monero) due to a double counting error, This is why GRAFT, developed an exploit of the double counting error with GRAFT master (current version of GRAFT), to demonstrate that GRAFT is not affected.

To run said exploit, they prepared a special test branch with the exploit: https://github.com/graft-project/GraftNetwork/tree/double-accounting-exploit.

Test data

The call "add_tx_pub_key_to_extra" is duplicated inside "construct_tx_and_get_tx_key (...)" method in cryptonote_core / cryptonote_tx_utils.cpp. The intention was that the destination purse with the error showed the incorrect balance (duplicate) after the transfer of the purse of origin exploited.

The destination wallet (GRAFT master, private testnet) before the test transfer shows a balance of 20 GRFT:

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Now, 10 GRFTs are transferred from the exploited source wallet (private testnet), trying to "cheat" the destination wallet:

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The destination purse after the transfer shows the correct amount (30 GRFT):

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This results in the registration of the destination wallet:

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So this case is already handled in the current version of Graft (1.2.1), which is based on Monero v11, and the error seems to be introduced in Monero v12, where they implemented the sub-address functionality.

this is why the current GRAFT purses are safe for all users, including exchanges.

GRAFT IS A BLOCKCHAIN / CRYPTOCURRENCY DESIGNED SPECIFICALLY FOR POINT OF SALE OF HIGH PERFORMANCE AND SECURITY.