Update Chain Specs in Parity Signer

In most cases, chain specs need to be scanned only when adding a new chain. However, you need to update them if the chain updates its address format, native token, or genesis hash.

Your Parity Signer Device is always offline and is air-gapped, so specs are updated via scanning a QR code. You can use the Parity Technologies Metadata Portal or the Nova Wallet Metadata Portal to find QR codes which will provide your Parity Signer Device with the information required to update the chain specs.

Chain Description	Parity Technologies Metadata Portal	Nova Wallet Metadata Portal
Polkadot / Kusama / Westend Relay Chains specs	Supported	Supported
Parachains, Solochains specs	Not Supported	Supported

The following steps need to be carried out on your Parity Signer Device.

1. Navigate to the appropriate metadata portal. Note: This should be done on a device which is not your Parity Signer Device.

2. Select the appropriate blockchain that you need to update the specs for.

3. Select the Chain Specs tab at the top of the metadata portal screen.

4. Using your Parity Signer Device, Select Scan.

5. Scan the Chain Specs QR code with your Parity Signer Device.

6. Review the verifier certificate and Select Approve.

7. If there was a metadata update as well, follow these steps next: Update Chain Metadata in Parity Signer.