> ## Documentation Index
> Fetch the complete documentation index at: https://sequence-0fb8d9e6-api_docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Unity Ecosystem Wallet Blockchain Interactions

> Ecosystem Wallet Documentation for Sequence's Unity SDK.

## Sign messages

Sign messages on an external browser.

```csharp theme={null}
Chain chain = Chain.TestnetAbitrumSepolia;
string message = "Your message to sign.";

SignMessageResponse response = await wallet.SignMessage(chain, message);
string signature = response.signature;
```

## Send transactions

Send transactions without paying for gas fees on any testnet or when using Gas Sponsorship.

```csharp theme={null}
Chain chain = Chain.TestnetAbitrumSepolia;
Address to = new Address("0x33985d320809E26274a72E03268c8a29927Bc6dA");

ITransaction[] transactions = new Transaction[]
{
    new Transaction(to, 0, "implicitEmit()"),
    new Transaction(to, 0, "explicitEmit()")
};

string txnHash = await wallet.SendTransaction(chain, transactions);
```

## Send transactions using Fee Options

Get available fee options for the user and choose one to use when sending the transaction.

```csharp theme={null}
Chain chain = Chain.TestnetAbitrumSepolia;
Address to = new Address("0x33985d320809E26274a72E03268c8a29927Bc6dA");

ITransaction[] transactions = new Transaction[]
{
    new Transaction(to, 0, "implicitEmit()"),
    new Transaction(to, 0, "explicitEmit()")
};

FeeOption[] feeOptions = await _wallet.GetFeeOption(chain, transactions);
FeeOption feeOption = feeOptions[0]; // Choose a way to select the appropriate option

string txnHash = await wallet.SendTransaction(chain, transactions, feeOption);
```

### Check if your wallet supports a transaction

You can do the same call for multiple transactions at once if you pass in a `Transactions[]` array.

```csharp theme={null}
Chain chain = Chain.TestnetAbitrumSepolia;
Address to = new Address("0x33985d320809E26274a72E03268c8a29927Bc6dA");
ITransaction transaction = new Transaction(to, 0, "implicitEmit()");

bool supported = await wallet.SupportsTransaction(chain, transaction);
```