v6.4.0 - 2026-07-20
1 min
release notes for voltage payments api release v6 4 0 , published 2026 07 20 automatic webhook retries now use a durable delay queue, honor the scheduled backoff and retry after timing, and avoid sending a new attempt after a delivery has already succeeded or been abandoned prepared on chain payments now reserve selected wallet inputs atomically so concurrent payment artifacts do not select the same outpoints reservations are retained across ambiguous or retryable failures and released when preparation is discarded, improving on chain and bip21 send reliability swap execution can route new swaps among configured nodes for the payment network while pinning in flight execution and reconciliation to the assigned node the generated openapi contract is now aligned more closely with verified runtime behavior across payments, quotes, wallets, webhooks, policies, assets, amounts, billing, and lines of credit the hosted payments guide now documents request variants, asynchronous lifecycle, units, pagination and filters, response interpretation, stable error fields, and complete quote to payment workflows payment documentation now distinguishes receive receipts from send outflows and documents all send outflow discriminator values, including tagged swap outflows, their steps, rails, and rail specific receipts these api documentation changes do not alter payment runtime behavior source github release https //github com/voltagecloud/backend/releases/tag/v6 4 0 | pr #2019 https //github com/voltagecloud/backend/pull/2019 | pr #2025 https //github com/voltagecloud/backend/pull/2025 | pr #2029 https //github com/voltagecloud/backend/pull/2029 | pr #2038 https //github com/voltagecloud/backend/pull/2038 | pr #2039 https //github com/voltagecloud/backend/pull/2039 | pr #2040 https //github com/voltagecloud/backend/pull/2040 | full changelog https //github com/voltagecloud/backend/compare/v6 3 0 v6 4 0
