LAX issuance against the 21,000,000 cap. Parallax follows Bitcoin's schedule: 50 LAX per block from block 1 (genesis pays nothing), halving every 210,000 blocks; there is no premine, burn or protocol lock, so circulating supply equals total issued (block rewards count from the block that pays them, although they are spendable only 100 blocks later). Returns the head height, issued supply in wei and LAX from the node (eth_getTotalSupply) and as recomputed here from the schedule (they must agree; "mismatch" is set if not), its share of the cap, what is left to mine, the current reward and era, daily issuance at the 600 second target (144 blocks), and the next halving: height, blocks to go, the reward after it, and the expected date at the target block time and at the last day's observed pace.