Staking and Rewards

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Staking Overview

• Validators operate nodes and participate in consensus
• Delegators stake SUI tokens with validators
• Rewards are distributed based on stake and performance
• Epochs define reward distribution periods (24 hours on mainnet)

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Validator Stake

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Stake Components

1. Self-stake: Validator’s own SUI tokens
2. Delegated stake: SUI delegated by token holders
3. Total stake: Self-stake + delegated stake

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Minimum Stake Requirements

# Query minimum stake
sui client call --package 0x3 --module sui_system --function get_min_validator_stake --args 0x5

• Mainnet: ~30 million SUI
• Testnet: ~1 million SUI

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Checking Validator Stake

# Display validator metadata
sui validator display-metadata

# Or check specific validator
sui validator display-metadata <validator-address>

curl -X POST http://localhost:9000 \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "suix_getValidatorsApy",
    "params": []
  }'

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Reward Mechanisms

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Reward Sources

1. Computation fees: Gas fees from transaction execution
2. Storage fees: Fees for on-chain data storage
3. Stake subsidies: Network-issued rewards (decreases over time)

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Reward Calculation

Validator Rewards = (Stake Weight × Base Rewards) + Performance Bonus

Where:
- Stake Weight = Validator Stake / Total Network Stake
- Base Rewards = Epoch rewards from fees and subsidies
- Performance Bonus = Additional rewards for high participation

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Epoch-Based Distribution

• Epoch duration: 24 hours (mainnet), varies on testnet
• Distribution time: Automatic at epoch change
• Claiming: Rewards are automatically compounded

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Commission Structure

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Setting Commission Rate

# Set commission rate (in basis points)
# 200 basis points = 2%
sui validator update-metadata --commission-rate 200

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Commission Calculation

Delegator Gross Rewards = (Delegated Stake / Total Stake) × Epoch Rewards
Validator Commission = Delegator Gross Rewards × Commission Rate
Delegator Net Rewards = Delegator Gross Rewards - Validator Commission

Validator Total Rewards = Self-Stake Rewards + Commission

Epoch rewards: 10,000 SUI
Validator stake: 50M SUI total
- Self-stake: 5M SUI
- Delegated: 45M SUI
Commission: 5%

Self-stake rewards: (5M/50M) × 10,000 = 1,000 SUI
Delegated stake rewards: (45M/50M) × 10,000 = 9,000 SUI
Commission: 9,000 × 5% = 450 SUI

Validator receives: 1,000 + 450 = 1,450 SUI
Delegators receive: 9,000 - 450 = 8,550 SUI (split among delegators)

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Updating Commission

# Request commission rate change
sui client call --package 0x3 --module sui_system \
  --function request_set_commission_rate \
  --args 0x5 <new_rate>

# Set commission rate for candidates
sui client call --package 0x3 --module sui_system \
  --function set_candidate_validator_commission_rate \
  --args 0x5 <new_rate>

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Delegation Management

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Accepting Delegation

• Sui Wallet
• CLI commands
• dApps and exchanges

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Delegation Flow

1. Delegator stakes SUI with your validator
2. Stake activates at next epoch boundary
3. Rewards accrue each epoch
4. Auto-compounding: Rewards are automatically re-staked

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Maximum Delegations

• Higher total stake increases validator rewards
• Very high stake may require more resources
• Voting power is capped to prevent centralization

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Gas Price Oracle

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Setting Gas Price Quote

# Update gas price quote
sui validator update-gas-price <price>

# With operation cap (if delegated)
sui validator update-gas-price \
  --operation-cap-id <cap-object-id> \
  <price>

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Gas Price Considerations

• Too low: May not cover operational costs
• Too high: Reduces network competitiveness
• Market-based: Monitor network conditions and adjust

• Mainnet: 750-1,000 MIST
• Testnet: 1,000 MIST

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Reward Monitoring

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Tracking Validator Rewards

# View validator metadata (includes rewards info)
sui validator display-metadata

# Check epoch information
curl -X POST http://localhost:9000 \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "suix_getLatestSuiSystemState",
    "params": []
  }' | jq '.result.epochRewards'

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Validator APY

curl -X POST http://localhost:9000 \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "suix_getValidatorsApy",
    "params": []
  }'

• Suiscan Validators
• SuiVision Validators

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Reward History

# Query events for validator
sui client events --query '{"MoveEventType":"0x3::validator::StakingRewardsEvent"}'

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Performance Impact on Rewards

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Participation Requirements

• Maintain uptime: >99% availability
• Participate in consensus: Vote on blocks
• Process transactions: Execute transactions correctly
• Stay synced: Keep up with network checkpoints

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Performance Penalties

1. Reduced rewards: Missing consensus rounds reduces epoch rewards
2. Tallying score impact: Low participation affects validator score
3. Risk of slashing: Byzantine behavior may result in stake slashing
4. Reputation damage: Delegators may withdraw stake

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Slashing Conditions

• Equivocation: Signing conflicting messages
• Byzantine behavior: Malicious actions reported by 2f+1 validators
• Protocol violations: Breaking consensus rules

# Validators report misbehavior
sui validator report-validator <offender-address>

# If 2f+1 validators report, slashing occurs automatically

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Operation Cap

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What is Operation Cap?

• Update gas price: Without using validator account key
• Report validators: Submit peer reports
• Operational flexibility: Separate hot/cold key management

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Managing Operation Cap

sui client objects --owner <validator-address>
# Look for UnverifiedValidatorOperationCap object

sui client transfer \
  --object-id <operation-cap-id> \
  --to <operator-address>

sui client call --package 0x3 --module sui_system \
  --function rotate_operation_cap \
  --args 0x5

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Withdrawal and Unstaking

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Delegator Unstaking

• Unstake request submitted
• Stake remains active until next epoch
• Funds available after epoch boundary

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Validator Leaving

# Request removal from validator set
sui validator leave-committee

1. Submit leave request
2. Remain active until next epoch
3. Removed from active set at epoch boundary
4. Staking pool becomes inactive
5. Delegators can withdraw stake

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Reactivating Validator

# Must have minimum stake
sui validator join-committee

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Best Practices

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For Validators

1. Competitive commission: Research market rates (typically 2-10%)
2. Transparent communication: Announce changes in advance
3. High uptime: Maintain >99.5% availability
4. Regular updates: Keep node software current
5. Performance monitoring: Track participation metrics
6. Delegator relations: Build trust through reliability

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For Delegators

1. Performance history: Check uptime and participation
2. Commission rate: Balance cost with validator quality
3. Total stake: Ensure validator meets minimum
4. Reputation: Research validator’s track record
5. Communication: Active, transparent operators

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Reward Optimization

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Maximizing Validator Rewards

1. Maintain high uptime: Participate in all consensus rounds
2. Optimize commission: Attract delegation without reducing profitability
3. Build reputation: Transparent communication and reliable operation
4. Marketing: Promote validator to attract delegators
5. Performance: Ensure infrastructure meets demands

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Cost-Benefit Analysis

Infrastructure: $3,000
Personnel: $5,000
Other: $500
Total: $8,500/month = $102,000/year

Stake: 50M SUI
APY: 3%
Self-stake (10%): 5M × 3% = 150,000 SUI
Commission (5%): 45M × 3% × 5% = 67,500 SUI
Total: 217,500 SUI/year

At $1/SUI: $217,500 revenue
Profit: $217,500 - $102,000 = $115,500

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Governance Participation

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Voting Power

Voting Power = Validator Stake / Total Network Stake

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Governance Rewards

• Additional rewards for voting
• Influence over protocol parameters
• Say in network upgrades

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Tax and Accounting

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Record Keeping

• Epoch rewards received
• Commission earned
• Operating expenses
• Stake changes
• Commission rate changes

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Tax Considerations

• Rewards may be taxable when received
• Commission is typically ordinary income
• Operating costs may be deductible
• Jurisdiction-specific regulations apply

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Resources

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Tools and Dashboards

• Suiscan Validators
• SuiVision Validators
• Sui Metrics Dashboard

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Documentation

• Validator Operations
• Committee Management
• System Requirements