Validator Reward Deep Dive Series

Sat, 03 Jan 2026 00:00:00 +0000

Context & Motivation

This series was originally authored during my tenure at Cosmostation, working with the Validator Team. The primary goal of this research was to provide a technical foundation for developing in-house validator monitoring and reward management tools.

To build robust infrastructure, we needed to go beyond the surface and understand the exact mathematical and programmatic flow of rewards across different blockchain architectures. This series documents that journey, covering Cosmos, Sui, Kaia, and Namada.

Series Index

1. Walrus: The Secret of Staking Rewards

Focus: Walrus 프로토콜의 보상 분배 메커니즘, 에포크 변경 및 환율 계산 로직 분석.
Key Insight: initiate_epoch_change와 process_pending_stake를 심층 분석하여 스테이킹 시점과 출금 시점의 환율 차이로 보상이 결정되는 과정을 설명합니다.

2. Sui: How are Epoch Rewards Delivered to Stakers?

Focus: Sui 프로토콜의 네이티브 스테이킹 보상 메커니즘과 sui_system Move 패키지를 통한 에포크 단위 보상 분배.
Key Insight: StakingPool의 환율(Exchange Rate)이 보상을 통해 어떻게 우상향하는지 설명하고, 스테이킹 및 출금 시점의 환율 차이로 보상이 산정되는 원리를 다룹니다.

3. Cosmos: How do Inflation and Fees become Delegator Rewards?

Focus: x/mint, x/auth, FeeCollector, x/distribution, x/staking 모듈 간의 상호작용을 통한 보상 생성 및 분배의 유기적인 과정.
Key Insight: 인플레이션과 수수료가 FeeCollector에 모여 검증인 풀로 이동하고, ‘누적 보상 비율(Cumulative Reward Ratio)‘과 지분(Share)을 기반으로 델리게이터에게 최종 분배되는 F1 모델의 흐름을 설명합니다.

4. Kaia: Staking Rewards in Public Delegation Contract

Focus: PublicDelegation.sol 시스템 컨트랙트와 ERC-20 기반 지분(Share) 토큰을 중심으로 한 스테이킹 보상 메커니즘.
Key Insight: stake() 호출 시 자동 재예치(Auto-compounding)가 발생하여 풀의 총 KAIA가 증가하고, 이로 인해 지분 가치가 상승(Value Accrual)하여 보상이 실현되는 원리를 설명합니다.

5. Namada: PoS Staking and Inflation in Namada

Focus: 나마다(Namada)의 에포크 기반 PoS 인플레이션과 ‘Reward Product’ 방식을 이용한 독창적인 보상 기록 메커니즘.
Key Insight: 매 에포크마다 위임 지분당 보상 비율인 reward_product가 기록되며, 이를 통해 델리게이터의 보상이 위임량 * reward_product의 합으로 산정되는 원리를 설명합니다.

Reflection

Building tools for a top-tier validator team requires a “don’t trust, verify” mindset toward protocol specifications. These articles served as the technical blueprint for our engineering team to ensure reward calculation accuracy and operational excellence.

I hope this archive remains a useful resource for anyone diving deep into the economics of Proof-of-Stake networks.

Validator Reward Deep Dive Series

Sat, 03 Jan 2026 00:00:00 +0000

Context & Motivation

Series Index

1. Walrus: The Secret of Staking Rewards

Focus: The reward distribution mechanism of the Walrus protocol, including epoch changes and exchange rate calculations.
Key Insight: deeply analyzes initiate_epoch_change and process_pending_stake to explain how rewards are determined by the exchange rate difference between staking and withdrawal.

2. Sui: How are Epoch Rewards Delivered to Stakers?

Focus: The native staking reward mechanism of the Sui protocol, driven by epoch changes and the sui_system Move package.
Key Insight: Explains how the StakingPool’s exchange rate tracks the compounding value of SUI rewards, allowing delegator rewards to be calculated based on the rate difference between staking and withdrawal.

3. Cosmos: How do Inflation and Fees become Delegator Rewards?

Focus: The organic interaction of x/mint, x/auth, FeeCollector, x/distribution, and x/staking modules to source, aggregate, and distribute rewards.
Key Insight: Explains the flow from sourcing (inflation/fees) to the FeeCollector, then to validator pools, and finally to delegators via share-based calculation using the ‘cumulative reward ratio’ (F1 Fee Distribution).

4. Kaia: Staking Rewards in Public Delegation Contract

Focus: The staking reward mechanism centered around the PublicDelegation.sol system contract and ERC-20 based share tokens.
Key Insight: Describes how stake() triggers auto-compounding, increasing the pool’s total KAIA while keeping shares constant, thus raising the share value (Value Accrual) which becomes the delegator’s reward.

5. Namada: PoS Staking and Inflation in Namada

Focus: Namada’s epoch-based PoS inflation and the unique ‘Reward Product’ mechanism for tracking rewards.
Key Insight: Explains how the reward_product (reward ratio per stake) is recorded each epoch, allowing delegator rewards to be calculated as the sum of delegated_amount * reward_product over the delegation period.

Reflection

I hope this archive remains a useful resource for anyone diving deep into the economics of Proof-of-Stake networks.

Research on Jeongseup Blog

Validator Reward Deep Dive Series

Context & Motivation

Series Index

1. Walrus: The Secret of Staking Rewards

2. Sui: How are Epoch Rewards Delivered to Stakers?

3. Cosmos: How do Inflation and Fees become Delegator Rewards?

4. Kaia: Staking Rewards in Public Delegation Contract

5. Namada: PoS Staking and Inflation in Namada

Reflection

Validator Reward Deep Dive Series

Context & Motivation

Series Index

1. Walrus: The Secret of Staking Rewards

2. Sui: How are Epoch Rewards Delivered to Stakers?

3. Cosmos: How do Inflation and Fees become Delegator Rewards?

4. Kaia: Staking Rewards in Public Delegation Contract

5. Namada: PoS Staking and Inflation in Namada

Reflection