Deposit

Open collateral, click deposit, pick an asset and an amount, and confirm. The collateral lands in the firm's margin account. A trade draws its initial margin from this balance when it binds. Fund it before trading. Time: ~1 min.

How does adding collateral work?

Open Collateral in the left nav and click Deposit on the asset row to fund. Then:

1. Click Deposit on the row. The popup opens locked to that one token: USDC or EURC. There is no chooser.
2. Enter an amount. Type it, or the deposit mints test collateral and approves it in the Sandbox.
3. Confirm. The wallet asks for a signature on the on-chain deposit. The available balance rises when it lands.

The deposit either mines and the margin account balance rises, or it reverts and nothing moves. Every balance surface re-reads when it lands.

Step 1: each asset row carries its own deposit button. Click it on the token to fund.

Step 2: the deposit popup, locked to that one token. Enter an amount and confirm; the wallet signs each step.

Step 3: the deposit lands: that token's available balance and the total posted both rise.

Where does collateral sit?

A deposit becomes collateral in the firm's margin account. It stays there, withdrawable, until a trade binds; at that moment the trade's initial margin locks, per position, for the life of the position. How each asset is valued and how margin is held: Collateral (~3 min) and The Margin Engine (~3 min).

What protects a deposit?

A deposit grants a standing approval — the permission contracts use to pull funds on the firm's behalf. The approve amount cap bounds it: an admin sets a net USD ceiling, and a leaked approval cannot pull more than that. Set the cap in Settings (~3 min).

Next: Place a trade (~5 min). Turn funded collateral into a hedge.