Abstract

A decentralized payment platform

A decentralized payment platform allows users to send and receive payments without the need for a trusted third-party. However, research has shown that there needs to be an intermediary to manage transactions and prevent double-spending.

Blockchain and its use of digital signatures (Encryption) is only part of the solution. The decentralization of network nodes is crucial to ensure long term safety of the network. In both Proof-of-Work (PoW) and Proof-of-Stake (PoS) blockchains, the longest chain provides a validation point. In a Proof-of-Work environment, this system is flawed because it relies on computational power.

This dependency means that if enough miners and equipment colluded, they could overpower a network. Initially,we proposed Proof-of-Stake as a better alternative because it does not decide the longest chain based on hash power. Instead, wallet balance and coin maturity are the methods of determination. However a 51% attack is still possible.

Fast forward to the future and Credit Smartchain relies on a system of PoA Proof-of-Authority consensus that can support short block time and lower fees. The most bonded validator candidates of staking will become validators and produce blocks. The double-sign detection and other slashing logic guarantee security, stability, and chain finality.