# Processing mode

Each wallet's settings include a **Processing mode**: **Fast** or **Secure**. This parameter defines the filtering criteria for incoming on-chain transactions. The selected mode determines how quickly the service processes your transaction, imports it, and matches it to an invoice.

Keep in mind: once a transaction passes the selected mode's filter and enters the database, it is **instantly** matched to the corresponding invoice (if one is found) and moves it to Paid.

## Fast mode

**How it works:** the system counts a transaction as soon as it appears on the network with the minimum number of confirmations (usually 1 block or the Confirmed status).

**When to use:**

* For selling low-cost goods and services (digital content, subscriptions)
* For micropayments
* When instant product delivery is critical for your business

**Specifics:** there is a very small risk of a blockchain reorg, where a transaction included in the first block is reversed by the network a few seconds later. In **Fast** mode, the system may confirm such a payment before the network rejects it.

## Secure mode

**How it works:** the system deliberately ignores an on-chain transaction until it reaches the community-recommended number of confirmations (finality). For Bitcoin, for example, this may be 3 blocks.

**When to use:**

* For selling expensive goods and services
* For topping up large user balances
* For physical goods whose delivery costs money and cannot be recalled
* For any operation where the financial risk of a reversed payment outweighs the inconvenience of waiting

**Specifics:** the customer does not see the payment confirmed on your site right away—it appears a few minutes later (depending on the network), once the transaction is considered safe from the blockchain's perspective.