Function FlashNode.closeChannel

See FlashAPI.closeChannel

override Result!(agora.crypto.ECC.Point) closeChannel (
  PublicKey sender_pk,
  PublicKey recv_pk,
  geod24.bitblob.BitBlob!(64L) chan_id,
  uint seq_id,
  agora.crypto.ECC.Point peer_nonce,
  Amount fee
) @trusted;