use crate::ln::channel::{ANCHOR_OUTPUT_VALUE_SATOSHI, MIN_CHAN_DUST_LIMIT_SATOSHIS};
use crate::ln::chan_utils::{HTLCOutputInCommitment, ChannelPublicKeys, HolderCommitmentTransaction, CommitmentTransaction, ChannelTransactionParameters, TrustedCommitmentTransaction, ClosingTransaction};
use crate::ln::{chan_utils, msgs, PaymentPreimage};
use crate::ln::channel::{ANCHOR_OUTPUT_VALUE_SATOSHI, MIN_CHAN_DUST_LIMIT_SATOSHIS};
use crate::ln::chan_utils::{HTLCOutputInCommitment, ChannelPublicKeys, HolderCommitmentTransaction, CommitmentTransaction, ChannelTransactionParameters, TrustedCommitmentTransaction, ClosingTransaction};
use crate::ln::{chan_utils, msgs, PaymentPreimage};
-use crate::chain::keysinterface::{Sign, InMemorySigner, ChannelSigner, EcdsaChannelSigner};
+use crate::chain::keysinterface::{WriteableEcdsaChannelSigner, InMemorySigner, ChannelSigner, EcdsaChannelSigner};
use bitcoin::secp256k1::{SecretKey, PublicKey};
use bitcoin::secp256k1::{Secp256k1, ecdsa::Signature};
#[cfg(anchors)]
use bitcoin::secp256k1::{SecretKey, PublicKey};
use bitcoin::secp256k1::{Secp256k1, ecdsa::Signature};
#[cfg(anchors)]
impl Writeable for EnforcingSigner {
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), Error> {
impl Writeable for EnforcingSigner {
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), Error> {