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Usage

Signature
The method emits ONRAMP_LAUNCHED with the purchase. It is safe to retry: a checkout is debited at most once, and a retry returns the purchase that the first call launched.
The bank transfer takes 1 to 3 business days to clear. ONRAMP_TRANSACTION_COMPLETE_V2 doesn’t fire for a bank transfer. Subscribe to the onramp.completed webhook to know when the USDC arrives.