Blockchain
Base Sepolia
Also known as: Base testnet
Base's test network — where LearnCoin's Developer-tier credentials anchor, free and unlimited, before graduating to Base mainnet.
Base Sepolia is the Base test network — a Base-family L2 rolled up to Ethereum's Sepolia testnet rather than mainnet. It uses test ETH (no monetary value) and is the standard dev-and-staging environment for projects building on Base.
LearnCoin's Developer tier anchors exclusively on Base Sepolia. Test-mode API keys (lrn_test_) issue credentials that anchor on Sepolia via the lds-merkle-proof-2019 Base Sepolia chain code (blink:base:sepolia:<tx>). Sepolia transactions are visible on sepolia.basescan.org; verification pages for test credentials link there instead of the mainnet Basescan.
Once a tenant upgrades to a paid tier and enables live mode, issuance moves to Base mainnet — same signing key (the KMS key is chain-agnostic), different anchor-transaction target. The transition is a configuration flip, not an architecture change.
Related terms