SohoPay does not emit merchant webhook events. The statuses you handle are the facilitator poll values: CREATED, SUBMITTED, CONFIRMED, FAILED, TIMED_OUT, DISPUTED. Fulfill only on CONFIRMED. The full table is on Settlements. The reason there is no signature header or retry schedule is on Settlement updates.

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Next steps

Settlements

Poll cadence and payout rules.

Merchant integration

The capture call that mints paymentId.