# Tokenisation Architecture

### okenisation Architecture

The tokenisation architecture defines how real-world assets are represented, constrained, and managed on-chain. It is designed to be **modular, auditable, and conservative**, ensuring that token logic does not overstep what can be enforced by code while remaining expressive enough for real financial use cases.

At a high level, the architecture separates **representation**, **rules**, and **state transitions** so that changes in one layer do not silently affect the others.

***

#### Architectural Overview

Tokenised RWAs are implemented as a coordinated set of on-chain components rather than a single monolithic contract.

```
Off-Chain Asset
      │
      ▼
Attestations / Proofs
      │
      ▼
Asset Representation Layer
      │
      ▼
Token Logic & Rules Engine
      │
      ▼
Ownership, Transfers, Settlement
```

Each layer has a clearly defined responsibility and trust boundary.

***

#### Asset Representation Layer

The asset representation layer acts as the **on-chain anchor** for an off-chain asset.

It defines:

* the identity of the asset
* the total eligible supply
* immutable metadata (asset type, jurisdiction, structure)
* links to external documentation or attestations

This layer is intentionally **low-frequency** — it changes rarely and only through explicit governance or attested updates.

***

#### Token Logic and Standards

Above the representation layer sits the token logic.

This includes:

* token standard implementation
* ownership tracking
* transfer and approval logic
* hooks for compliance and restrictions

The architecture supports standard token interfaces so that RWAs remain composable with wallets, marketplaces, and other on-chain systems, while still enforcing asset-specific rules.

***

#### Ownership and Entitlement Mapping

Tokens do not represent physical possession. They represent **defined rights or entitlements**.

Examples include:

* claims on cash flows
* fractional ownership interests
* redemption rights
* governance or voting rights

The mapping between tokens and entitlements is:

* explicitly defined
* enforced consistently
* immutable unless updated through governed processes

This prevents ambiguity about what token ownership actually means.

***

#### Supply Control and Issuance Logic

Supply control is a core architectural concern.

Issuance logic enforces that:

Circulating Supply≤Authorized Asset Supply\text{Circulating Supply} \leq \text{Authorized Asset Supply}Circulating Supply≤Authorized Asset Supply

Minting and burning are:

* permissioned by protocol rules
* constrained by onboarding parameters
* auditable through on-chain history

There is no mechanism for discretionary or silent supply changes.

***

#### Rule Enforcement Engine

Transfer and lifecycle rules are enforced at the token level.

These rules may include:

* eligibility restrictions
* jurisdictional constraints
* holding limits
* transfer freezes under defined conditions

Rules are evaluated **on every state transition**, not retroactively. If a transfer violates rules, it simply does not execute.

***

#### Modularity and Upgradability

The architecture is modular by design.

* Asset metadata is isolated from transfer logic
* Compliance rules are configurable within bounds
* Settlement logic can evolve without rewriting ownership history

Upgrades are:

* explicit
* governed
* recorded on-chain

There is no hidden or implicit mutability.

***

#### Handling Asset State Changes

Real-world assets change over time.

The architecture supports:

* updates via attestations
* lifecycle events (e.g. maturity, redemption)
* controlled freezes or restrictions

State changes are **declared and validated**, not inferred. This avoids drift between on-chain and off-chain reality.

***

#### Failure-Aware Design

The architecture assumes that:

* attestations may fail
* data may be delayed
* external actors may misbehave

As a result, it supports defensive actions such as:

* pausing transfers
* restricting issuance
* escalating to governance

These actions are bounded and transparent, not discretionary.

***

#### Why This Architecture Matters

Many RWA systems fail by embedding:

* legal logic inside mutable contracts
* discretionary power inside upgrade keys
* trust assumptions inside opaque abstractions

This architecture avoids those failures by:

* separating concerns
* enforcing constraints at the lowest possible level
* making authority explicit

The result is a system that remains **predictable under stress**, not just under ideal conditions.