Maximum unsigned XDR size: 1,048,460 bytes. Providers must enforce this before
requesting user approval. Reserves 116 bytes within MAX_TRANSACTION_BYTES
for the Ed25519 pubkey envelope: the signature vector count, key ID, scheme,
and 64-byte signature, plus the present pubkey_claim_key option holding the
scheme-tagged 32-byte key.
Maximum unsigned XDR size: 1,048,460 bytes. Providers must enforce this before requesting user approval. Reserves 116 bytes within MAX_TRANSACTION_BYTES for the Ed25519 pubkey envelope: the signature vector count, key ID, scheme, and 64-byte signature, plus the present
pubkey_claim_keyoption holding the scheme-tagged 32-byte key.