01
Check
Validate the original card and confirm its available balance.
Talk to us Make every gift card
feel native.
Diesel connects external gift card programmes to Shopify checkout—so customers can exchange, spend, and refund value without friction.
LIVE EXCHANGE
DIESEL
•••• •••• •••• 1234
Original cardVerified
Value reserved£50.00
Shopify checkoutApplied
Ready to settleComplete
EXCHANGE ✦ APPLY ✦ COMPLETE ✦ REFUND ✦ RECOVER ✦ OBSERVE ✦EXCHANGE ✦ APPLY ✦ COMPLETE ✦ REFUND ✦ RECOVER ✦ OBSERVE ✦EXCHANGE ✦ APPLY ✦ COMPLETE ✦ REFUND ✦ RECOVER ✦ OBSERVE ✦
01 / The product
One clean checkout.
A lot happening underneath.
Diesel coordinates the difficult parts of moving value between two systems, while keeping the customer journey simple.
02
Exchange
Reserve the value and apply a native Shopify gift card at checkout.
03
Settle
Complete, retire, refund, or safely release funds as the order changes.
02 / Built for the edge cases
Calm at checkout.
Resilient everywhere else.
Networks time out. Customers leave. Webhooks arrive late. Diesel is designed around the reality of payment-adjacent workflows—not the happy-path diagram.
01
Checkout
A native-feeling exchange
Customers enter their card details directly in checkout. Diesel handles validation, exchange, and application without sending them elsewhere.
02
Operations
Every event, visible
Follow completed, failed, refunded, retired, and aborted jobs from the Shopify admin—with the full payload when you need it.
03
Recovery
Built for unfinished checkouts
Delayed releases protect value when a checkout is abandoned, while completion-aware safeguards stop settled cards being cleared by a late job.
1shared queue
3×timeout retries
100%tenant isolated
24/7event visibility
03 / Architecture
One control plane.
Your systems stay yours.
Each store keeps its own tenant configuration and API boundary. A shared worker coordinates durable jobs without mixing credentials, events, or customer data between clients.
SHOPIFYYour storeCheckout + Admin
TENANTDiesel instanceStore-specific logic
CONTROL PLANEQueue + workerDispatch + recovery
04 / Documentation
Know exactly
what happens next.
Plain-English guides for implementation, operations, and every stage of the exchange lifecycle.
01
Checkout lifecycle
Understand exchange, completion, retirement, and abort behaviour.
02Webhooks
Connect order and refund events to your tenant instance.
03Queue operations
Learn how jobs are dispatched, retried, and observed.
04Admin tools
Use events, tagged orders, and manual balance actions safely.
Implementation details are tailored during onboarding.
SVS Partners
Tell us about your Shopify store.
We’ll help map Diesel to your existing systems.