Function create_bridge_jwt 

pub fn create_bridge_jwt(
    claims: &BridgeJwtClaims,
    signing_key: &SigningKey,
) -> Result<String, String>

Creates a DID-signed JWT for bridge authentication.

This is a convenience function for bridge operators to create authentication tokens. The JWT is signed with the operator’s Ed25519 signing key.

Arguments

• claims — The JWT claims payload.
• signing_key — The operator’s Ed25519 signing key (32 bytes).

Errors

Returns an error string if signing fails.