PropAMM fills on Ethereum mainnet and PropAMM support for TEMBRI (toolbox): same-block quotes, a small spread, and flow taken from lagging AMMs
In briefPropAMM fills on Ethereum mainnet and TEMBRI toolbox support: same-block quotes and tight spreads
SummaryThe post analyses 92,627 fills across nine Ethereum PropAMMs, on-chain venues priced by a single maker, over 30 days from 10 September to 9 October 2026. Three venues accept quotes only when stamped with the current block's timestamp, so every fill executes against an update in the same block. Takers paid about 0.45 bp at the fill, and prices did not move in their favour afterwards.