Quarkchain: Root chain support POSW stake DecayByHeightAndTime

[ping-ke]

related issue: QuarkChain/pm#12

Added function and unit test for root chain to support PoSW stake decay to 50% after ENABLE_ROOT_POSW_STAKING_DECAY_TIMESTAMP.
The enable time (ENABLE_ROOT_POSW_STAKING_DECAY_TIMESTAMP in config) currenlty set to 1746060000 which is 2025-05-01 08:40:00. And this can be changed if we finalize.

How to test:

1. Add related Unit test
2. Deploy pyquarkchain and goquarkchain with devnet config, run related test
   • integrate with UI (devnet.quarkchain.io);
   • integrate eth_api (Ethereum compatible RPC)
   • check posw has enable as expected, and decay as expected
   • use metamask to transfer token
   • use remix to deploy contract and call contract
   • use quarkchain public rpc (38391) to get chain/block/transaction info
   • check posw has enable as expected, and decay as expected

[qzhodl]

related issue: QuarkChain/pm#12

Added function and unit test for root chain to support PoSW stake decay by epoch. The enable time (ENABLE_ROOT_POSW_STAKING_DECAY_TIMESTAMP in config) currenlty set to 1746060000 which is 2025-05-01 08:40:00. And this can be changed if we finalize.

Do we plan to test this on the testnet? If so, what is the test plan?

[qzhodl]

related issue: QuarkChain/pm#12
Added function and unit test for root chain to support PoSW stake decay by epoch. The enable time (ENABLE_ROOT_POSW_STAKING_DECAY_TIMESTAMP in config) currenlty set to 1746060000 which is 2025-05-01 08:40:00. And this can be changed if we finalize.

Do we plan to test this on the testnet? If so, what is the test plan?

How did you test it? Could you share the test steps and results?

[ping-ke]

related issue: QuarkChain/pm#12
Added function and unit test for root chain to support PoSW stake decay by epoch. The enable time (ENABLE_ROOT_POSW_STAKING_DECAY_TIMESTAMP in config) currenlty set to 1746060000 which is 2025-05-01 08:40:00. And this can be changed if we finalize.

Do we plan to test this on the testnet? If so, what is the test plan?

How did you test it? Could you share the test steps and results?

1. Add related Unit test
2. Deploy pyquarkchain and goquarkchain with devnet config, run related test
   • integrate with UI (devnet.quarkchain.io);
   • integrate eth_api (Ethereum compatible RPC)
   • check posw has enable as expected, and decay as expected
   • use metamask to transfer token
   • use remix to deploy contract and call contract
   • use quarkchain public rpc (38391) to get chain/block/transaction info
   • check posw has enable as expected, and decay as expected