# Settlement (zero-priced launch policy)

Unstable

Zero-priced launch settlement The transaction mechanism is live. Every active price resolves to 0 EXO with an explicit ZeroFeeReason. Future governance amendments may enable nonzero pricing.

## Quotes

A quote is generated against a trust receipt. Under the current launch policy every quote returns `amount = 0` with a `ZeroFeeReason`. The quote includes an `expires_at`; expired quotes must be regenerated.

## ZeroFeeReason

- `launch_policy_zero` — the default during alpha.
- `governance_subsidy` — issued under specific governance amendments.
- `humanitarian_carve_out` — declared scopes (see governance).

## Settlement receipts

Committing a quote yields a settlement receipt. The receipt references the quote, the trust receipt, and the fee reason, and is signed and chained to its predecessor.

## Future pricing

Future governance amendments may enable nonzero pricing for declared scopes. The economy crate ships the full mechanism today; it is suppressed by policy. Pricing changes route through the constitutional governance kernel.