IVT Staking Mechanism

This page describes the Investcoin (IVT) staking mechanism as implemented in the staking smart contract. The staking design is intentionally simple, rule-based, and auditable, with a fixed lock period and tier-based APY determined by the participant’s total staked balance.

All staking operations are executed on-chain and can be independently verified.

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Key Design Features

• Single position per wallet: each address maintains one staking position with aggregated balance.

• Tier-based APY: the reward rate depends on the participant’s total staked amount.

• Fixed lock period: each deposit sets the unlock date to a fixed duration from the deposit timestamp.

• No discretionary rewards: rewards are computed deterministically from contract rules.

• Solvency controls: withdrawals require sufficient contract balance; the owner can fund rewards when needed.

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Eligibility and Minimum Stake

To stake IVT, a participant must:

• Approve the staking contract to transfer IVT (approve), then

• Call deposit(amount) with amount > 0.

Minimum stake requirement:

• After a deposit, the wallet’s total staked balance must be at least 1,000 IVT. If the resulting total is below the minimum, the deposit is rejected.

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Lock Period (Fixed)

IVT staking uses a fixed lock duration of 540 days (approximately 18 months).

• On every successful deposit, the staking position’s lockEndsAt is set to:

  lockEndsAt = block.timestamp + 540 days

Important implication: If you add more tokens later, the lock timer is reset to a new 540-day period from that deposit time.

Withdrawals of principal and rewards are only available when:

• block.timestamp >= lockEndsAt

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Tier Structure (Commitment Levels)

A participant’s tier is determined by the total staked balance (after deposit). The contract automatically assigns the tier using fixed thresholds:

Tier	Total Staked Balance (IVT)	APY (BPS)	APY (%)
Tier 1	≥ 1,000 and < 10,000	200	2.00%
Tier 2	≥ 10,000 and < 50,000	250	2.50%
Tier 3	≥ 50,000	300	3.00%

Notes:

• Tiers are calculated automatically on deposit and stored in the staking position.

• If a deposit moves the wallet into a new tier, the contract emits a TierChanged event.

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Reward Accrual (How Rewards Are Calculated)

Rewards accrue over time based on:

• Your staked balance

• Your tier APY

• The elapsed time since the last accrual timestamp

Rewards are computed proportionally per second, using:

• BPS = 10,000 (basis points)

• YEAR = 365 days (annualization constant)

The contract internally tracks:

• accruedRewards (settled rewards already accounted for)

• lastRewardTimestamp (the last time rewards were settled for the wallet)

For transparency, the contract exposes helper views such as:

• stakeInfo(account) — returns stake position details plus pendingRewards, unlocksIn, and the effective apyBps

• previewRewards(account) — returns pending rewards

• timeUntilUnlock(account) — returns seconds remaining until unlock

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Depositing (Adding to Your Stake)

When you call deposit(amount) the contract performs these steps:

1

Update global reward accounting

Global accruals are updated so rewards remain consistent across users.

2

Settle pending rewards into accruedRewards

Your pending rewards are settled into accruedRewards.

3

Increase staked balance

Your staked balance increases by amount.

4

Recalculate tier

Your tier is recalculated based on the new total staked balance.

5

Reset lock

Your lock is reset: lockEndsAt = now + 540 days

6

Transfer tokens

Tokens are transferred from your wallet into the contract.

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Withdrawal After Unlock (Principal + Rewards)

When the lock period expires, you may call withdraw() to receive:

• 100% of principal, plus

• net rewards (after fee)

Rewards Fee:

• 0.5% fee on rewards (FEE_BPS = 50)

Net rewards are computed as:

• fee = rewards * 0.5%

• netRewards = rewards - fee

Your payout is:

• payout = principal + netRewards

The contract requires that its IVT balance is sufficient to cover:

• participant payout, and

• fee retention (kept inside the contract as excess IVT)

When the withdrawal completes, the staking position is cleared (stake becomes zero and tier resets to none).

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Emergency Withdraw (Principal Only)

The contract includes an emergency pathway:

• emergencyWithdraw()

This function is available only when emergency mode is enabled by governance/administration.

Characteristics:

• Returns principal only

• All rewards are forfeited (both accrued and pending)

• The staking position is cleared immediately

This mechanism exists to protect participants in exceptional incidents while preserving system integrity.

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Solvency and Reward Funding

To ensure the staking contract remains solvent:

• The owner can fund rewards via fundRewards(amount), transferring additional IVT into the contract.

• The owner can withdraw excess IVT via withdrawRewards(to, amount) only if the contract remains able to cover principal obligations. The contract enforces:

  contract balance ≥ totalStaked + amount

This prevents withdrawing tokens that are needed to pay stakers’ principal.

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Operational Controls (Pause / Disable)

The contract includes administrative controls typically used for risk management:

• Pause: temporarily blocks deposit/withdraw operations.

• Staking enable/disable: staking can be disabled; when disabled, reward accrual uses a cutoff timestamp to stop further accrual after the disable moment.

These controls exist to support safe operation and incident response.

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Summary for Participants

• Minimum stake: 1,000 IVT

• Fixed lock: 540 days, reset on every deposit

• Tier APY is based on total staked amount (Tier 1–3)

• Rewards accrue deterministically over time

• withdraw() after unlock pays principal + net rewards (0.5% fee on rewards)

• emergencyWithdraw() (if enabled) returns principal only and forfeits rewards

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Conclusion

The IVT Staking Mechanism is a structured, tier-based system designed to reward commitment, reduce volatility, and strengthen the ecosystem.

By clearly differentiating participants according to their level of commitment, IVT ensures that long-term aligned stakeholders are appropriately recognized and incentivized.

All staking rules are transparent, predictable, and enforced by smart contracts.