# BridgeLogic

{% hint style="info" %}
This contract tracks events when liquidity is minted without backing, later backed by another user, and when reserves are enabled as collateral.
{% endhint %}

### Events 

* **BackUnbacked(reserve, backer, amount, fee)**\
  Emitted when someone **backs previously unbacked liquidity** (assets minted without immediate backing).
  * `reserve`: The asset being backed.
  * `backer`: The address providing the backing liquidity.
  * `amount`: The amount backed.
  * `fee`: The fee paid for backing.

***

* **MintUnbacked(reserve, user, onBehalfOf, amount, referralCode)**\
  Emitted when **unbacked aTokens are minted** for a user (tokens representing liquidity, but not yet matched by reserve funds).
  * `reserve`: The underlying asset.
  * `user`: The address initiating the mint.
  * `onBehalfOf`: The address receiving the minted aTokens.
  * `amount`: The amount of tokens minted.
  * `referralCode`: Optional referral code used for rewards or tracking.

***

* **ReserveUsedAsCollateralEnabled(reserve, user)**\
  Emitted when a user **enables a reserve asset as collateral**.
  * `reserve`: The asset being marked as collateral.
  * `user`: The address of the user enabling it.

```
[
  {
    "anonymous": false,
    "inputs": [
      { "indexed": true, "internalType": "address", "name": "reserve", "type": "address" },
      { "indexed": true, "internalType": "address", "name": "backer", "type": "address" },
      { "indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256" },
      { "indexed": false, "internalType": "uint256", "name": "fee", "type": "uint256" }
    ],
    "name": "BackUnbacked",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      { "indexed": true, "internalType": "address", "name": "reserve", "type": "address" },
      { "indexed": false, "internalType": "address", "name": "user", "type": "address" },
      { "indexed": true, "internalType": "address", "name": "onBehalfOf", "type": "address" },
      { "indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256" },
      { "indexed": true, "internalType": "uint16", "name": "referralCode", "type": "uint16" }
    ],
    "name": "MintUnbacked",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      { "indexed": true, "internalType": "address", "name": "reserve", "type": "address" },
      { "indexed": true, "internalType": "address", "name": "user", "type": "address" }
    ],
    "name": "ReserveUsedAsCollateralEnabled",
    "type": "event"
  }
]


```


---

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