> For the complete documentation index, see [llms.txt](https://docs.kiiglobal.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kiiglobal.io/docs/learn/readme.md).

# What is KiiChain?

### What is Kii?

Kii is an onchain FX layer powering global payments, trading and finance solutions in an easy-to-use platform designed for everyone. Users, businesses or builders can use Kii by signing up for an account or connecting to APIs. Kii differs from other traditional platforms by its hybrid approach of sourcing liquidity and maintaining balances onchain exposed to local currencies. Kii supports fiat swaps and payins/payouts via the pricing of local, non-dollar stablecoins and other tokenized real-world assets.

### Hybrid Matching Engine

At the core of Kii is a hybrid matching engine that is able to source onchain liquidity across any blockchain ecosystem while using centralized pricing to hedge and rebalance onchain positions. The result is an ultra-liquid layer that can operate 24/7 on certain pairs that only have liquidity during traditional business hours.

### Ramps

Kii has a full suite of on and off ramps enabling instant payins and payouts from its system. These ramps are both UI and API enabled with the ability to disperse directly or to third-party accounts. On and Off ramp functionality is available only where permitted by applicable law and, where required, is delivered through licensed issuers and distributors. Availability differs by jurisdiction, and certain jurisdictions — absent local licensing — are excluded.

### Sign up for an account

Use KiiChain by logging in or signing up [here](https://pay.kiichain.io/).&#x20;

### Connect to APIs

Kii has developed a suite of APIs that embed all centralized and decentralized functionalities into a single set of APIs that any application can use. For more information on the APIs, visit:

* [Kii APIs](https://docs.kiiglobal.io/docs/kiichain-pay/introduction)

### KYC / AML

Kii operates only where permitted by applicable law and, where required, through locally licensed partners; availability differs by jurisdiction. Users must complete applicable KYC/AML requirements.

### Cosmos SDK

The Cosmos SDK is an open-source framework for building multi-asset public Proof-of-Stake (PoS) blockchains, like the Cosmos Hub. The goal of the Cosmos SDK is to allow developers to easily create custom blockchains from scratch that can natively interoperate with other blockchains. SDK-based blockchains are built out of composable modules, most of which are open-source and readily available for any developers to use. The Cosmos SDK is a capabilities-based system that allows developers to better reason about the security of interactions between modules. Learn more about Cosmos [here](https://docs.cosmos.network/).

### Comet BFT

Comet BFT (Byzantine Fault Tolerant) is the upgraded version of Tendermint Core, the Interchain's consensus mechanism that powers Cosmos SDK blockchain systems. Comet BFT has a modular architecture that separates the consensus engine from the application layer, allowing developers to build custom blockchain applications easily. It offers fast transaction finality and high throughput, making it ideal for applications that require quick and reliable performance. Learn more about Comet BFT [here](https://cometbft.com/).

### Proof-of-Stake

KiiChain is a Proof-of-Stake blockchain. PoS selects validators based on the number of tokens they hold and are willing to "stake" as collateral for servicing and securing the network. Delegators, or individual "stakers", can delegate their tokens to any specific validator that meets the requirements.

### EVM Module

The EVM module allows for mirrored EVM compatibility and for smart contracts to be deployed in Solidity to the network. This means it can run all existing Ethereum dApps and smart contracts without needing any changes. It achieves this with a high-performance Ethereum Virtual Machine (EVM) that is optimized for speed and reliability. Thanks to its modular, plugin-based design, it allows any host blockchain to execute Ethereum transactions and smart contracts.

### IBC

Inter-Blockchain Communication is a protocol that allows for cross chain communication and data transfers. It connects different blockchain networks to promote high levels of interoperability, scalability and communication. IBC can be implemented to any blockchain network as long as it conforms to its protocol guidelines. Currently, there are over 100 networks integrated into IBC. Read more about IBC [here](https://www.ibcprotocol.dev/).

### Kii RWA Protocol

The Kii RWA Protocol sets standardization of Real World Asset (RWA) tokenization through the T-REX (Token for Regulated EXchanges) protocol using CosmWasm smart contracts on KiiChain that are simultaneously mirrored to ERC tokens. The T-REX protocol is designed for compliant issuance and management of tokens on blockchain networks. Apart from token standards, the protocol defines onchain KYC, KYB and asset verification. The Kii RWA protocol on KiiChain is creating an interoperable unified liquidity layer for RWA tokens.


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