# Smart Guardrails

Smart Guardrails ensure that only safe, liquid, and executable assets can be reached through the Universal Access Schema.\
They act as an automated clearing layer — verifying each token before OPN accepts a BuyIntent.

Smart Guardrails run four independent checks:

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### 4.1 Liquidity Verification

Ensures the asset has sufficient on-chain liquidity for deterministic execution.

**Checks include:**

* Minimum liquidity thresholds on local DEXs
* Reliable routing paths (no fragmented liquidity)
* Slippage safety under expected volumes

**Why it matters:**\
Tokens with thin liquidity can cause failed trades, high slippage, or delivery mismatches.

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### 4.2 Contract Integrity Review

Analyzes the token’s smart contract for security and behavioral risks.

**Checks include:**

* Mint / burn authority
* Proxy or upgrade logic
* Fee-on-transfer behavior
* Pausable or blacklist controls
* Known exploit patterns

**Why it matters:**\
Users should never buy a token whose code allows unexpected minting, freezing, or execution traps.

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### 4.3 Admin Key Analysis

Examines whether a token can be manipulated post-launch.

**Checks include:**

* Ownership status (EOA, multisig, timelock)
* Ability to change fees, supply, or trading rules
* Privileged functions that override market reality

**Why it matters:**\
Admin keys can compromise user safety if not properly structured or time-locked.

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### 4.4 Settlement Compatibility (OPN Compatibility)

Ensures the token can be executed natively and non-custodially.

**Checks include:**

* Exists on a supported chain with native liquidity
* No bridging, wrapping, or derivative representations
* Deterministic settlement possible via local USDC liquidity

**Why it matters:**\
Gateway and OPN only execute **native, verifiable** settlement paths — no wrappers, no synthetic assets.

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### 4.5 Outcome of Smart Guardrail Checks

Each token receives one of three results:

| Status         | Meaning                                                                 |
| -------------- | ----------------------------------------------------------------------- |
| **Cleared**    | Token is eligible. Schema links work globally.                          |
| **Restricted** | Token partially passes checks; schema may work in limited contexts.     |
| **Rejected**   | Token fails core safety requirements and is not executable via Gateway. |

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### 4.6 Why Smart Guardrails Exist

Smart Guardrails prevent:

* Unsafe assets from being purchased
* Illiquid assets from causing failed settlement
* Wrapped/bridged assets from creating fragmentation
* Users from encountering opaque or malicious token behavior

They are the foundation of **trust, determinism, and safety** for the Universal Access Schema.

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### 4.7 Summary

Smart Guardrails ensure that:

* Users only interact with safe, verifiable assets
* Chains remain sovereign (local liquidity, no bridges)
* Execution remains deterministic
* Every schema link points to a trustworthy path

They function as the **on-chain clearing layer** of the ONCHAIN® Protocol Network.