Cross-chain interoperability protocol LayerZero is asking eligible users to pay for ZRO airdrop claims via a new mechanism called “Proof-of-Donation.”

To claim ZRO, users must donate $0.10 in USDC, USDT, or native ETH per ZRO, according to a post from the LayerZero Foundation. Claims are open from June 20 to Sept. 20.

The funds generated will go directly to Protocol Guild, with the foundation matching all donations up to $10 million to support its goals of equitable distribution, community building, and protocol health.

Protocol Guild is a non-profit funding collective for Ethereum core researchers and developers, with the mechanism resulting in up to $18.5 million in donations overall, according to the LayerZero Foundation. Donations received by Protocol Guild will be vested over four …