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OP Rewards Campaign

Overview

The OP rewards campaign allowed users to earn OP tokens by supplying USDC to sUSDC on Spark Savings across both Optimism Mainnet and Unichain. The campaign ran from June 3rd, 2025 at 01:00 UTC until the end of 2025.

Reward Distribution

Rewards were distributed based on these key factors:

  • Weekly distributions of approximately 76,525.69 OP tokens (subject to weekly adjustments based on market APY)
  • Total campaign allocation: 2,000,000 OP tokens over 7 months
  • Rewards accrued every second based on the user's share of total sUSDC across both chains
  • Distributions occurred once per week (Every Monday), starting June 10th, 2025

Campaign Details

  • Campaign Duration: June 3rd, 2025 – End of 2025 (Approx 7 months)
  • Distribution Networks:
    • Rewards were distributed on Optimism Mainnet only
    • Rewards were calculated based on sUSDC holdings on both Optimism Mainnet and Unichain
    • Single claim process for rewards from both chains on OP Mainnet

Claim Process

  • During the claim windows, users could claim their rewards at https://app.spark.fi/rewards. The final claim window has since closed, and rewards can no longer be claimed.
  • You can find more information on how rewards claiming works here.
  • Claims were processed through the SparkRewards contract on Optimism Mainnet
  • The Merkle root contains combined rewards for both chains

Token Information

Reward Token

Involved Tokens

Claim Deadlines

  • Users had to claim their rewards within 3 months from the end of each epoch. Rewards not claimed within the 3-month window expired and cannot be claimed.
  • Epochs ran quarterly, with the first epoch starting June 3rd, 2025. The final claim window has closed.

Restricted Geographies

No country restrictions applied. However the Spark Terms of Use still apply, meaning that e.g. sanctioned users are not able to claim rewards.