Builds every casatookan:// link, comes back here with Casa’s answer and verifies the signature.
Open this page on the phone where Casa Tookan is installed, with the wallet unlocked — otherwise browse and getaddress are ignored.
casatookan://browse/{url}
Casa signs msg then calls x-success back:
an app scheme (myapp → myapp://sendaddress?address=…&msg=…&sig=…)
or an https:// page (→ https://…?address=…&msg=…&sig=…).
Filled in automatically when Casa returns to this page; otherwise paste the callback URL you received. The Ethereum signature is verified (raw keccak256, v = 27+recid — the legacy web3XCP format, not EIP-191).
casatookan://superUser/{true|false}