Waves is a decentralized platform, in the same sense as Bitcoin, blockchain where different kinds of transactions can occur. When mentioning “brokers” I meant different blockchains where you can issue asset. Imagine you have a token on ETH platform and would like to move this token to BTC colored coins. It would be great to have a protocol for this. So we will try also to create a protocol for token/asset transfer between blockchains. Assets issued on NXT or ETH can be transferred to ETH.

In a PoS system each node that holds a balance in the main network token has a chance (proportional to its balance) to produce a block. In the two-tier architecture it is logical to move payment processing onto the full nodes alone. At the same time, all nodes with non-zero balances still have to be eligible for staking rewards.

The theoretical issue of reduced security caused by fewer nodes staking can be addressed through explicit balance leasing from lightweight nodes to full nodes. By leasing their balance to a trusted full node a lightweight node actually increases its chance of collecting transaction fees, since it does not have to stay online, and the full node has an increased chance of producing a block due to its increased balance.