Function peel_payment_onion

pub fn peel_payment_onion<NS: Deref, L: Deref, T: Verification>(
    msg: &UpdateAddHTLC,
    node_signer: NS,
    logger: L,
    secp_ctx: &Secp256k1<T>,
    cur_height: u32,
    allow_skimmed_fees: bool,
) -> Result<PendingHTLCInfo, InboundHTLCErr>
where
    NS::Target: NodeSigner,
    L::Target: Logger,

Peel one layer off an incoming onion, returning a PendingHTLCInfo that contains information about the intended next-hop for the HTLC.

This does all the relevant context-free checks that LDK requires for payment relay or acceptance. If the payment is to be received, and the amount matches the expected amount for a given invoice, this indicates the msgs::UpdateAddHTLC, once fully committed in the channel, will generate an Event::PaymentClaimable.