I Built the First DEX on BlockDAG Blockchain — Here's What I Learned

I Built the First DEX on BlockDAG Blockchain 999DEX is live at https://999dex.com — the first native DEX on BlockDAG blockchain (Chain ID: 1404). 15 smart contracts deployed in 6 days. Critical Gotcha: EVM Target BlockDAG does not support the PUSH0 opcode (added in Ethereum Shanghai). Compiling with default settings silently breaks at deploy time. Fix: // hardhat.config.js solidity : { version : " 0.8.20 " , settings : { optimizer : { enabled : true , runs : 200 }, evmVersion : " berlin " // ← critical for BlockDAG } } Bonding Curve Math Cost to buy N tokens from position S — exact, no rounding: cost = N × BASE_PRICE + SLOPE × (S × N + N²/2) 36/36 unit tests passing. Architecture BondingCurve — fair launch phase, price discovery until 300k BDAG raised. PoolFactory — post-graduation AMM, creates liquidity pool with raised BDAG. FeeDistributor — automated fee split: 50% stakers / 30% treasury / 20% buyback-burn. What We Built Meme token launcher (bonding curve, fair launch) AMM DEX with