3 posts.
Tempo is a payments chain with no native token: fees are paid in USD stablecoins. Measured: 550 ms blocks, instant finality, an eth_getBalance that returns the same huge number for every address, the 0x76 transaction type, and a 20,000-result eth_getLogs cap.
Read →Plasma is a stablecoin-focused EVM L1 (chain ID 9745) with a protocol paymaster that makes basic USDT transfers zero-fee — users don't even need the native token. It's standard EVM (viem/ethers work), with sub-second PlasmaBFT finality and Bitcoin anchoring. Here's the developer map, including how the gasless-stablecoin model changes payment flows.
Read →Celo became an OP Stack L2 in March 2025 (with EigenDA), keeping chain ID 42220. It's standard EVM, so viem/ethers work — but it has a feature almost no other chain does: pay transaction fees in stablecoins like cUSD, not just the native token. Here's the developer map, including fee currencies and the L1→L2 shift.
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