# Glossary


Short definitions of the terms used across these pages, each with a link to the page that explains it in full.

## Terms

### Deposit address

The address in the `address_in` field that you show to the payer; it is permanent for a ticker, payout address and callback URL. See [API reference](api-reference.md).

### Payout address

The address in the `address_out` field that receives every forwarded deposit, minus fees. See [Quick start](quickstart.md).

### Callback

The request the gateway sends to your callback URL when a deposit is detected or forwarded. See [Callbacks](callbacks.md).

### Pending callback

The early callback with `pending` set to `1`, sent when a deposit is first detected and only when the order was created with `pending=1`. See [Callbacks](callbacks.md).

### Confirmations

The number of confirmations the inbound deposit had when the callback event was created, in the `confirmations` field. See [Callbacks](callbacks.md).

### Ticker

The path value that names the network and the asset together, such as `trc20/usdt`; tickers are lowercase and case-sensitive. See [Tickers and networks](tickers.md).

### TRC20

The token standard of the TRON network, used by tickers that start with `trc20`. See [Tickers and networks](tickers.md).

### BEP20

The token standard of the BNB Smart Chain, used by tickers that start with `bep20`. See [Tickers and networks](tickers.md).

### USDT

The Tether stablecoin, accepted on each network that lists a `usdt` ticker. See [Tickers and networks](tickers.md).

### Service fee

A percentage of the deposit, never less than the minimum service fee, that is charged on every deposit. See [Fees and minimums](fees.md).

### Network fee

A fixed amount per forwarding transaction, charged in the asset itself. See [Fees and minimums](fees.md).

### value_coin

The callback field with the deposit amount in whole units of the asset. See [Fees and minimums](fees.md).

### fee_coin

The callback field with everything that was charged on the deposit, service fee and network fee together. See [Fees and minimums](fees.md).

### value_forwarded_coin

The callback field with the amount that reached your payout address, which is `value_coin` minus `fee_coin`. See [Fees and minimums](fees.md).

### uuid

The callback field that identifies one callback; it stays the same across retries, so use it to skip repeats. See [Callbacks](callbacks.md).