At Spire, we're building the Based Stack — letting apps spin up their own based rollup L2s / appchains. As rollup ecosystems evolve, a new frontier is emerging — L3s built on top of existing L2s. This post explores how Spire’s approach, which combines shared settlement and coordinated sequencing, can extend beyond L2s, enabling rollups to function as synchronous execution environments. This architecture extends beyond traditional rollup sequencing models, offering faster, customizable intra-b...

IntroductionAs appchain adoption grows, there will be an increasing need for chains to opt-into having their blobs aggregated and compressed with blobs from other appchains. Aggregation carries the following benefits:appchains can submit transactions to their chosen DA layer more frequently. They no longer need to wait to have enough transaction data to fill a blob before submitting, or pay the cost of submitting partially filled blobs.appchains can use blobspace more efficiently, particularl...