# FtSigner · FT4 TypeScript client · Chromia Docs (concept)

> The FtSigner interface represents an instance
of a Signer that uses Ft signatures to sign transactions. interface FtSigner { pubKey : Buffer;
} Hierarchy (

Source: https://docs.chromia.com/pages/ft4-ts-client/interfaces/authentication.FtSigner/

Interface

# FtSigner

On this page

* [Properties](#properties)
* [pubKey](#pubkey)

The FtSigner interface represents an instance
of a `Signer` that uses Ft signatures to sign transactions.

```signature
interface FtSigner {
    pubKey: Buffer;
}
```

#### Hierarchy ([View Summary](https://docs.chromia.com/pages/ft4-ts-client/hierarchy/#authentication.FtSigner))

* FtSigner
  + [FtKeyStore](https://docs.chromia.com/pages/ft4-ts-client/interfaces/authentication.FtKeyStore/)

## Properties

### pubKey

```signature
pubKey: Buffer
```

[View this page on docs.chromia.com](https://docs.chromia.com/pages/ft4-ts-client/interfaces/authentication.FtSigner.html)Generated API reference, mirrored from the live docs