Wallet token P&L / FIFO cost basis / realized + unrealized profit / EVM portfolio analytics. For any (wallet, ERC-20, chain) triple, pulls all transfers from Etherscan v2, prices each one at the historical USD spot via CoinGecko, runs FIFO accounting and reports cost basis, realized gain, unrealized gain, current balance, and tx count. Capped at the most recent 500 transfers.