code: func (g *gossipServiceImpl) UpdateLedgerHeight(height uint64, chainID common.ChainID) {
  	gc := g.chanState.getGossipChannelByChainID(chainID)
  	if gc == nil {
  		g.logger.Warning("No such channel", chainID)
  		return
  	}
  	gc.UpdateLedgerHeight(height)
  }
docs: // UpdateLedgerHeight updates the ledger height the peer
  // publishes to other peers in the channel