Bank & events (env)

transfer live

transfer(to_ptr, to_len, amount: i64) → i32

Native uNRO payout from this contract’s balance. Host validates snapshot, debits in-memory for sequencing, records (to, amount) for commit only if the whole call succeeds (not dry-run).

Return	Meaning
0	ok
-1	amount≤0, no self addr, insufficient balance, bad UTF-8

Analogs: CosmWasm BankMsg::Send, NEAR transfer / attached deposit.

emit_event live

emit_event(topic_ptr, topic_len, data_ptr, data_len)

Append { topic, data } UTF-8 event. Stored/indexed on successful commit.

set_return live

set_return(ptr, len)

Set call return_data from guest memory (overwrites previous).

log planned

Human log line; may map to emit_event("log", …).