If this HTLC is involved in a forwarding operation, this field indicates
the forwarding channel. For an outgoing htlc, it is the incoming channel.
For an incoming htlc, it is the outgoing channel. When the htlc
originates from this node or this node is the final destination,
forwarding_channel will be zero. The forwarding channel will also be zero
for htlcs that need to be forwarded but don't have a forwarding decision
persisted yet.
forwardingHtlcIndex
forwardingHtlcIndex:string | number
Index identifying the htlc on the forwarding channel.
If this HTLC is involved in a forwarding operation, this field indicates the forwarding channel. For an outgoing htlc, it is the incoming channel. For an incoming htlc, it is the outgoing channel. When the htlc originates from this node or this node is the final destination, forwarding_channel will be zero. The forwarding channel will also be zero for htlcs that need to be forwarded but don't have a forwarding decision persisted yet.