Universal Staking: allowing ZETA staker to receive cctx fees as rewards #2793
Description
### Tasks
- [ ] https://github.com/zeta-chain/node/issues/2754
- [ ] https://github.com/zeta-chain/node/issues/2791
- [ ] https://github.com/zeta-chain/node/issues/2792
- [ ] https://github.com/zeta-chain/node/issues/2800
- [ ] https://github.com/zeta-chain/node/issues/2930
- [ ] https://github.com/zeta-chain/node/issues/3005
- [ ] https://github.com/zeta-chain/node/issues/3201
- [ ] https://github.com/zeta-chain/node/issues/3401
What
ZRC-20 transactions to connected chains (withdrawals) incur cross-chain transaction fees. This is a proposal to develop a way for these fees to be split amongst network participants.
Why
This amplifies the utility of ZETA and creates a stronger market incentive to build with and create cross-chain transactions. ZETA stakers receive additional rewards of “hard” assets
Tokens that are whitelisted by the protocol have a built-in incentive for users to transact across chains with these tokens.
Example
Transaction to withdraw costs using contract X.
- Withdraw fee, equals to 0.1 ETH.
- Portion of fee attributed to staking pool for stakers/developers.
- Stakers get a basket of all assets related to ZRC-20.
Technical Consideration
With the dependent precompile listed above, the function could be mostly implemented at the smart contract level.
Right new two way could be considered for the reward directed to the staking pool:
- An additional withdraw fee: the current fee is already used to cover the transaction on the destination, we can't use these fund at the source level, but we can define a parameter of additional fees (eventually relative) that are sent to the stakers
- Remaining funds: for CCTX, as not all the gas is consumed in the outbound, the remaining funds are currently sent to the gas stability pool. We could use a percentage of this funds to be sent to the staker pool. The percentage could depend on the chain depending on gas price stability. For example for BNB chain and many fast chains 100% could be sent to staker pool