IIP-59: Protocol-Native Voter Reward Distribution

[raullenchai]

Summary

Replaces the centralized Hermes reward distribution service with protocol-native, automatic voter reward distribution via hard fork.

Key changes:

• Add CommissionRate field to Candidate registration (basis points, 0–10000)
• Modify GrantEpochReward() to auto-distribute voter rewards proportionally by weighted vote
• Voters claim via existing ClaimFromRewardingFund — zero new infrastructure
• Delegates opt in by calling SetCommissionRate; legacy behavior preserved for rate = 0

Why kill Hermes:

• Single point of failure, centralized key custody, stale codebase (2022)
• All data for distribution already exists on-chain (buckets, vote weights, reward accounts)
• Protocol-native distribution: zero gas, zero external dependencies, fully trustless

Includes:

• Full specification with skeleton Go implementation code
• Protobuf extensions
• Test cases (8 scenarios)
• Security analysis
• Migration plan (gradual delegate opt-in)

Builds on IIP-58 (ioSwarm) which introduced the RewardSettlement pattern.

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