> For the complete documentation index, see [llms.txt](https://docs.fly.trade/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fly.trade/developers/deprecated-magpie-contracts/magpieaggregator-diamond-proxy/bridge/libtransaction.md).

# LibTransaction

The `LibTransaction` library provides functions for encoding and decoding a `Transaction` struct into a byte array. 

```solidity
struct Transaction {
    DataTransferType dataTransferType;
    BridgeType bridgeType;
    uint16 recipientNetworkId;
    bytes32 fromAssetAddress;
    bytes32 toAssetAddress;
    bytes32 toAddress;
    bytes32 recipientAggregatorAddress;
    uint256 amountOutMin;
    uint256 swapOutGasFee;
    uint64 tokenSequence;
}
```

<table><thead><tr><th width="311.3333333333333">Field</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td><pre><code>dataTransferType
</code></pre></td><td><pre><code>DataTransferType
</code></pre></td><td><p><code>DataTransferType</code> has two named values: <code>Wormhole</code> and <code>LayerZero</code>.</p><p>Each named value is assigned an implicit integer value, starting at 0 for the first value and incrementing by 1 for each subsequent value. In this case, <code>Wormhole</code> is assigned the value 0, and <code>LayerZero</code> is assigned the value 1.</p></td></tr><tr><td><pre><code>bridgeType
</code></pre></td><td><pre><code>BridgeType
</code></pre></td><td><p><code>BridgeType</code> has two named values: <code>Wormhole</code> and <code>Stargate</code>.</p><p>Each named value is assigned an implicit integer value, starting at 0 for the first value and incrementing by 1 for each subsequent value. In this case, <code>Wormhole</code> is assigned the value 0, and <code>Stargate</code> is assigned the value 1.</p></td></tr><tr><td><p></p><pre class="language-solidity"><code class="lang-solidity">recipientNetworkId
</code></pre></td><td><p></p><pre class="language-solidity"><code class="lang-solidity">uint16
</code></pre></td><td>the network id of the recipient chain.</td></tr><tr><td><pre><code>fromAssetAddress
</code></pre></td><td><pre><code>bytes32
</code></pre></td><td>the address of the source asset address that will get swapped. Example: <code>0x0000000000000000000000007b155e039f60ad89b3b3761a513238dfeebd8ab1</code></td></tr><tr><td><pre><code>toAssetAddress
</code></pre></td><td><pre><code>bytes32
</code></pre></td><td>the address of the destination asset address that will be received after swapping.<br>Example: <br><code>0x0000000000000000000000003b981e413aedcd075d96a8f28d2aaff9b15f4f01</code></td></tr><tr><td><pre><code>toAddress
</code></pre></td><td><pre><code>bytes32
</code></pre></td><td>the address of the recipient. <br>Example: <code>0x000000000000000000000000EE2249f8E5c4E84882eBA16DC991F3Fd4404C955</code></td></tr><tr><td><pre><code>recipientAggregatorAddress
</code></pre></td><td><pre><code>bytes32
</code></pre></td><td>the address of the aggregator at the destionation address. </td></tr><tr><td><pre><code>amountOutMin
</code></pre></td><td><pre><code>uint256
</code></pre></td><td>the minimum swapped amount that is acceptable by the user. Example: <code>100000000000000000</code></td></tr><tr><td><pre><code>swapOutGasFee
</code></pre></td><td><pre><code>uint256
</code></pre></td><td>the gas fee that the user can pay for the swapping. <br>Example: <code>100000</code></td></tr><tr><td><pre><code>tokenSequence
</code></pre></td><td><pre><code>uint64
</code></pre></td><td>the sequence we receive while transferring the tokens over the bridge. </td></tr></tbody></table>

<pre class="language-solidity"><code class="lang-solidity"><strong>struct TransactionValidation {
</strong>    bytes32 fromAssetAddress;
    bytes32 toAssetAddress;
    bytes32 toAddress;
    uint256 amountOutMin;
    uint256 swapOutGasFee;
}
</code></pre>

<table><thead><tr><th>Field</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td><pre><code>fromAssetAddress
</code></pre></td><td><pre><code>bytes32
</code></pre></td><td>This field is of type <code>bytes32</code> and represents the address of the asset being transferred from. The address is typically encoded as a 32-byte value.</td></tr><tr><td><pre><code>toAssetAddress
</code></pre></td><td><pre><code>bytes32
</code></pre></td><td>This field is of type <code>bytes32</code> and represents the address of the asset being transferred to. Similar to <code>fromAssetAddress</code>, it is encoded as a 32-byte value.</td></tr><tr><td><pre><code>toAddress
</code></pre></td><td><pre><code>bytes32
</code></pre></td><td>This field is of type <code>bytes32</code> and represents the destination address of the transfer. It is also encoded as a 32-byte value.</td></tr><tr><td><pre><code>amountOutMin
</code></pre></td><td><pre><code>uint256
</code></pre></td><td>This field is of type <code>uint256</code> and represents the minimum amount of the transferred asset that should be received. It defines a threshold for the expected output amount.</td></tr><tr><td><pre><code>swapOutGasFee
</code></pre></td><td><pre><code>uint256
</code></pre></td><td>This field is of type <code>uint256</code> and represents the gas fee associated with the swap or transfer operation. It specifies the amount of gas required for completing the transaction.</td></tr></tbody></table>

### encode()&#x20;

The `encode` function takes a `Transaction` struct and converts it into a byte array.&#x20;

**Input**&#x20;

<table><thead><tr><th>Field</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td><pre class="language-solidity"><code class="lang-solidity">transaction
</code></pre></td><td><pre class="language-solidity"><code class="lang-solidity">Transaction
</code></pre></td><td>the transaction struct to perform the encoding.</td></tr></tbody></table>

**Output**

<table><thead><tr><th>Field </th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td><pre class="language-solidity"><code class="lang-solidity">transactionPayload
</code></pre></td><td><pre class="language-solidity"><code class="lang-solidity">bytes
</code></pre></td><td>returns the encoded data in the form of bytes.</td></tr></tbody></table>

### decode()

The `decode` function takes a byte array and converts it back into a `Transaction` struct.

**Input**

<table><thead><tr><th>Field</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td><pre class="language-solidity"><code class="lang-solidity">transactionPayload
</code></pre></td><td><pre class="language-solidity"><code class="lang-solidity">bytes
</code></pre></td><td>the payload in bytes that needs to be decoded</td></tr></tbody></table>

**Output**

<table><thead><tr><th>Field</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td><pre class="language-solidity"><code class="lang-solidity">transaction
</code></pre></td><td><pre class="language-solidity"><code class="lang-solidity">Transaction
</code></pre></td><td>returns the Transaction struct after the decoding is completed.</td></tr></tbody></table>