Non-fungible token marketplace OpenSea is teasing the April addition of Solana (SOL-USD) NFTs. The exact date was note mentioned. "The best kept secret in web3," according to a tweet Tuesday, which contained a vague video hinting at the Solana NFT release. Solana (SOL-USD) would become the third layer 1 and fourth blockchain network whose NFTs can trade on OpenSea, after Ethereum (ETH-USD), Polygon (MATIC-USD) and Klayton, CoinDesk noted. Keep in mind that layer 1 refers to a base network, such as bitcoin (BTC-USD), solely validating transactions. The move could prompt challenges for Magic Eden, a leading exchange for Solana NFTs, according to CoinDesk. Solana NFT sales at Magic Eden account for 90% of market share in the past week. In January, OpenSea bought DeFi wallet platform Dharma Labs.