Kizuna Crypto-Fast Lane: Collateral-Backed Speed

What is the Crypto-Fast Lane

The Crypto-Fast Lane is Kizuna's second settlement path, designed for crypto-native agents that can post collateral for low-friction access. Rather than requiring prefunding for every dollar of spend, the crypto-fast lane lets agents borrow against collateral — providing speed and flexibility while maintaining financial safety through LTV caps and health factor enforcement.

The model is similar to DeFi lending: agents post collateral (SOL, supported SPL tokens), borrow against it up to defined limits, and repay to free up capacity. The critical difference is that every loan originates from a verified Kizuna settlement, not an arbitrary borrowing action.

Collateral and Pool Isolation

Each crypto-fast agent operates within its own isolated collateral pool. This isolation means:

• One agent's risk cannot affect another's collateral
• Liquidation of one pool does not cascade to others
• Each pool has its own LTV ratio, health factor, and debt ceiling
• Collateral and debt accounting are per-pool, providing clean audit trails

Pool isolation is enforced at the protocol level. The facilitator and kernel both validate pool boundaries during verify, preventing cross-pool contamination.

LTV and Health Factor

Two metrics govern crypto-fast lane safety:

These metrics work together to ensure that every crypto-fast settlement is overcollateralized. The system provides early warnings and gradual restrictions as risk increases, rather than sudden failures.

Settlement and Debt

When a crypto-fast agent settles a payment, the settlement amount becomes debt within the agent's isolated pool. Unlike enterprise lane where settlements consume prefund, crypto-fast settlements create obligations that the agent must repay.

• Settlement creates debt against the isolated pool
• Debt accrues interest at rates set by governance
• Repayment frees up borrowing capacity for future settlements
• The companion API tracks debt positions and provides repayment endpoints

Repayment and Rebalancing

Crypto-fast agents manage their pools by repaying debt and adjusting collateral. The companion API provides endpoints for:

• Repaying outstanding debt (partial or full)
• Adding collateral to improve health factor
• Withdrawing excess collateral (only when health factor permits)
• Querying current pool state (collateral, debt, LTV, health factor)

Agents that maintain healthy pools with timely repayment build stronger Meishi reputations, which can lead to better terms over time through kernel policy adjustments.

When to Use Crypto-Fast Lane

The crypto-fast lane is ideal for:

• DeFi agents that already hold crypto assets as collateral
• Autonomous trading agents that need fast, flexible settlement
• Agents that prefer capital efficiency over the simplicity of prefunding
• Crypto-native teams comfortable with collateral management
• High-frequency agents where prefund replenishment would create operational friction

If your agents operate in compliance-heavy environments or prefer zero credit risk, consider the Enterprise Lane instead.