  This paper discusses the issues with liquidity that inhibit adoption of
so-called wrapped tokens, i.e. digital assets issued in one blockchain
ecosystem (origin) with representation in other blockchain networks
(destination), and an incentive model and a governance mechanism for solving
these issues are suggested. The proposed liquidity model called Graviton can be
implemented both within the framework of a single destination chain, or as a
blockchain-agnostic solution combining various blockchain platforms together
and providing liquidity to wrapped tokens in each of them. This model does not
depend on how cross-chain transfer gateways are implemented, and can work with
both centralized gates and bridges, or decentralized trustless gateways, as
well as gateways based on oracle networks and threshold signatures.
