> ## Documentation Index
> Fetch the complete documentation index at: https://docs.resq.software/llms.txt
> Use this file to discover all available pages before exploring further.

# ResQ.Blockchain.INeoClient.RecordLocationAttestationAsync(ResQ.Blockchain.LocationAttestation,System.Threading.CancellationToken)

### [ResQ.Blockchain](./ResQ.Blockchain.md "ResQ.Blockchain").[INeoClient](./ResQ.Blockchain.INeoClient.md "ResQ.Blockchain.INeoClient")

## INeoClient.RecordLocationAttestationAsync(LocationAttestation, CancellationToken) Method

Records a drone location attestation on the blockchain.

```csharp theme={null}
System.Threading.Tasks.Task<ResQ.Blockchain.TransactionResult> RecordLocationAttestationAsync(ResQ.Blockchain.LocationAttestation attestation, System.Threading.CancellationToken cancellationToken=default(System.Threading.CancellationToken));
```

#### Parameters

<a name="ResQ.Blockchain.INeoClient.RecordLocationAttestationAsync(ResQ.Blockchain.LocationAttestation,System.Threading.CancellationToken).attestation" />

`attestation` [LocationAttestation](./ResQ.Blockchain.LocationAttestation.md "ResQ.Blockchain.LocationAttestation")

The location attestation containing drone position and signature.

<a name="ResQ.Blockchain.INeoClient.RecordLocationAttestationAsync(ResQ.Blockchain.LocationAttestation,System.Threading.CancellationToken).cancellationToken" />

`cancellationToken` [System.Threading.CancellationToken](https://learn.microsoft.com/en-us/dotnet/api/system.threading.cancellationtoken "System.Threading.CancellationToken")

Cancellation token for the operation.

#### Returns

[System.Threading.Tasks.Task\<](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 "System.Threading.Tasks.Task`1")[TransactionResult](./ResQ.Blockchain.TransactionResult.md "ResQ.Blockchain.TransactionResult")[>](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 "System.Threading.Tasks.Task`1")\
A [TransactionResult](./ResQ.Blockchain.TransactionResult.md "ResQ.Blockchain.TransactionResult") containing the transaction hash and confirmation status.

#### Exceptions

[System.InvalidOperationException](https://learn.microsoft.com/en-us/dotnet/api/system.invalidoperationexception "System.InvalidOperationException")\
Thrown when the blockchain operation fails.

[System.OperationCanceledException](https://learn.microsoft.com/en-us/dotnet/api/system.operationcanceledexception "System.OperationCanceledException")\
Thrown when the operation is cancelled.

### Example

```csharp theme={null}
var attestation = new LocationAttestation(
    DroneId: "drn-001",
    Latitude: 37.7749,
    Longitude: -122.4194,
    Altitude: 100.0,
    Timestamp: DateTimeOffset.UtcNow,
    Signature: "0x..."
);

var result = await neoClient.RecordLocationAttestationAsync(attestation);
```

### Remarks

Location attestations provide cryptographic proof of a drone's position at a specific time.
This is useful for compliance, incident reconstruction, and verification of mission execution.