Notes

• Keep userId and userName stable across sessions per currency.

• Use UTC timestamps for digest; agree on 12‑hour formatting exactly as TS expects.

• Maintain a session cache keyed by token for quick wallet lookups.

• Record all wallet calls with full request/response for reconciliation.

• Expose an internal admin tool to search by externalTradeId.

• For production, rotate the digest secret periodically and monitor for mismatches.

Tap-specific additions:

• High-frequency closes. A 2s cell that wins fires closetrade within ~80 ms of the touch tick. Expect bursts when many cells expire on the same 2-second boundary; partner endpoint must handle short spikes well above steady-state RPS.

• Idempotency key. (externalTradeId, externalTradeType="tap") — each externalTradeId arrives at opentrade once and closetrade once.

• Don't re-validate cell coordinates. TS is authoritative on pMin/pMax/tStart/tEnd.

• closetrade.data.touchPrice is informational — surface in reconciliation reports / trade-history UIs; do not use it for wallet logic.

• Cancelled settlements with no prior partner signal are normal — they correspond to trading-window boundaries.

Support

Coordinate with Tradesmarter integration contacts for IP allowlists, currency enablement, and production cutover.