The DER and Base64 encoding of the certificate in the <i> position of the ECS CA certificate chain. For example, the certificate specified with the ca.certchain.0 parameter is the certificate of the CA that issued the certificate specified with the ca.cert parameter.

CA Gateway returns the selected certificate when querying the following resource with $field set to ca.chain.

GET /v1/certificate-authorities

You must statically configure this setting because the ECS public API does not yet allow querying certificates from the CA.

Mandatory: Yes.