verify (receipt)

Checks receipt integrity, hash validity, optional Ed25519 signature, or remote verification; returns True only on definitive success.

# Source: https://github.com/yvgude/lean-ctx | License: Apache-2.0 | Copyright You must retain, in the Source form of any Derivative Works
# Provided via justclaw.it.com; keep this notice with the code.
    def verify(self) -> bool:
        """Return only affirmative verification; all uncertainty is ``False``."""
        if self.integrity_status != "sealed" or not self._canonical_json:
            return False
        if not isinstance(self.canonical_hash, str) or not _SHA256.fullmatch(self.canonical_hash):
            return False
        digest = "sha256:" + hashlib.sha256(self._canonical_json).hexdigest()
        if digest != self.canonical_hash:
            return False

        public_key = getattr(self, "_public_key", None)
        if self.signature and public_key:
            return

... (truncated -- full source via MCP)