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...

One of the core promises of rollups is scalability without compromising Ethereum's neutrality and decentralisation. But many rollups today still rely on centralised sequencers—entities with privileged access to ordering transactions. While efficient, this undermines the trust-minimised ethos that makes rollups attractive in the first place. At Spire Labs, we've been exploring a new approach to this problem with Based Rollups. As part of this journey, we're releasing our Based Stack. It's a fo...

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...

We’re sharing a live public demo of the first based L3 appchain — now running on testnet. You can try it here: https://frontend.l3testnet.spire.dev/ This post breaks down what it is, why it matters, and where we’re headed next.Synchronously composability is unlockedA “based L3” is an appchain that is sequenced by underlying L2 — no centralized sequencer, no additional trust assumptions. This enables something powerful: synchronous composability with L2, just like a smart contract on L2. In th...

We’re sharing a live public demo of the first based L3 appchain — now running on testnet. You can try it here: https://frontend.l3testnet.spire.dev/ This post breaks down what it is, why it matters, and where we’re headed next.Synchronously composability is unlockedA “based L3” is an appchain that is sequenced by underlying L2 — no centralized sequencer, no additional trust assumptions. This enables something powerful: synchronous composability with L2, just like a smart contract on L2. In th...

One of the core promises of rollups is scalability without compromising Ethereum's neutrality and decentralisation. But many rollups today still rely on centralised sequencers—entities with privileged access to ordering transactions. While efficient, this undermines the trust-minimised ethos that makes rollups attractive in the first place. At Spire Labs, we've been exploring a new approach to this problem with Based Rollups. As part of this journey, we're releasing our Based Stack. It's a fo...

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...

The first synchronously composable appchain on Celo, the Ethereum Layer 2 built for the real world and designed for fast, low-cost transactions, is now live. Through a new collaboration between Spire, cLabs, and Self Protocol, this appchain is powered by Self’s zero-knowledge Proof of Humanity and built using Pylon, Spire’s platform for synchronous composability. The launch demonstrates how appchains can now natively verify onchain human identity without sacrificing user privacy. Together, we...

The first synchronously composable appchain on Celo, the Ethereum Layer 2 built for the real world and designed for fast, low-cost transactions, is now live. Through a new collaboration between Spire, cLabs, and Self Protocol, this appchain is powered by Self’s zero-knowledge Proof of Humanity and built using Pylon, Spire’s platform for synchronous composability. The launch demonstrates how appchains can now natively verify onchain human identity without sacrificing user privacy. Together, we...