Ramp sessions
A ramp session moves value between fiat and crypto. In Sumvin, ramp sessions are Meld-backed — the partner creates a session through the Platform API, and the user completes the flow in the Meld widget. The settlement lands on a Sumvin-managed wallet (for buy flows) or on a connected off-ramp destination (for sell / off-ramp flows).The three kinds
| Kind | Direction | Landing |
|---|---|---|
| Buy | Fiat → crypto | A user wallet on the chosen chain |
| Sell | Crypto → fiat | A connected account registered during the flow |
| Off-ramp | Crypto → fiat (generalised) | Roadmap — settlement rails beyond the MVP sell flow |
Session lifecycle
- Created — partner creates a session via the Platform API with the user’s scoped authorisation.
- Client-configured — the partner embeds the Meld widget using session-level credentials, pre-filled with the authorised amount and asset.
- User completes at Meld — the user authorises payment or crypto movement in the widget.
- Settlement — Meld returns the settlement result; Sumvin records the transaction against the user and delivers the settled value to the landing wallet or account.
sr:us:pint:spend:ramp with max, asset, currency parameters). The widget and the settlement are both scoped to those parameters.
See also
- Meld overview — product-level framing
- Meld buy / sell — buy and sell configuration
- Meld off-ramp — the off-ramp flow
- Meld client setup — embedding the widget