in fastpay/src/network.rs [303:315]
fn handle_confirmation_order(
&mut self,
order: ConfirmationOrder,
) -> AsyncResult<AccountInfoResponse, FastPayError> {
Box::pin(async move {
let shard = AuthorityState::get_shard(
self.num_shards,
&order.transfer_certificate.value.transfer.sender,
);
self.send_recv_bytes(shard, serialize_cert(&order.transfer_certificate))
.await
})
}