diff --git a/specs/experimental/l2_blob_tx.md b/specs/experimental/l2_blob_tx.md index 4bc9088f0..5bf6c2f34 100644 --- a/specs/experimental/l2_blob_tx.md +++ b/specs/experimental/l2_blob_tx.md @@ -13,29 +13,29 @@ ## Motivation -To make it seamless for dapps that's depending on blob transaction to migrate from L1 to L2, it's important that L2 also supports blob transaction. This will also make L3 more uniform since they can also use blob transaction for batch submitting, just like L2. +The proposal aims to integrate BLOB transaction support into the OP Stack. BLOB transactions are gaining popularity on Layer 1 (L1), with applications including BLOB inscriptions, Rollups (as an optional feature), and EthStorage. However, given the high costs associated with L1, it is crucial to implement BLOB transaction support in the OP Stack. This implementation would significantly reduce migration costs for projects and users looking to leverage BLOB transactions in a more cost-effective environment. ## How It Works -The changes include two parts: optimism and op-geth. +The changes include two parts: one part in `optimism` repo and the other part in `op-geth` repo. -The optimism part mainly includes: -1. Add `L2BlobConfig` field to `rollup.Config` so that if configured, L2 blob tx will be supported and optionally the blob can be stored to a [DA provider](https://github.com/ethstorage/da-server) by sequencer. - 1. There're a bunch of workarounds to make L2 blob tx work for op stack: +The `optimism` part mainly includes: +1. Add `L2BlobConfig` field to `rollup.Config` so that if configured, L2 BLOB tx will be supported and optionally the BLOB can be stored to a [DA provider](https://github.com/ethstorage/da-server) by the sequencer. + 1. There're a bunch of changes to make L2 BLOB tx work for OP Stack: 1. [`BuildBlocksValidator`](https://github.com/blockchaindevsh/optimism/blob/106fbfd5d45efa45d6580cf169a5e053e406b933/op-node/p2p/gossip.go#L250) is modified to support non-zero `BlobGasUsed` and `ExcessBlobGas`. - 2. [`spanBatchBlobTxData`](https://github.com/blockchaindevsh/optimism/blob/106fbfd5d45efa45d6580cf169a5e053e406b933/op-node/rollup/derive/span_batch_tx.go#L49) is added to support blob tx for span batch. - 3. [`CheckBlockHash`](https://github.com/blockchaindevsh/optimism/blob/106fbfd5d45efa45d6580cf169a5e053e406b933/op-service/eth/types.go#L218) is modified to support broadcasting blocks with blob tx. - 4. [`SimpleTxManager.craftTx`](https://github.com/blockchaindevsh/optimism/blob/106fbfd5d45efa45d6580cf169a5e053e406b933/op-service/txmgr/txmgr.go#L252) is modified to support blob tx. + 2. [`spanBatchBlobTxData`](https://github.com/blockchaindevsh/optimism/blob/106fbfd5d45efa45d6580cf169a5e053e406b933/op-node/rollup/derive/span_batch_tx.go#L49) is added to support BLOB tx for span batch. + 3. [`CheckBlockHash`](https://github.com/blockchaindevsh/optimism/blob/106fbfd5d45efa45d6580cf169a5e053e406b933/op-service/eth/types.go#L218) is modified to support broadcasting blocks with BLOB tx. + 4. [`SimpleTxManager.craftTx`](https://github.com/blockchaindevsh/optimism/blob/106fbfd5d45efa45d6580cf169a5e053e406b933/op-service/txmgr/txmgr.go#L252) is modified to support BLOB tx. 5. A `p2p.sync.onlyreqtostatic` flag is [added](https://github.com/ethereum-optimism/optimism/pull/11011) to support fetching blocks from static peers only. -2. For L2 blob tx, only blob hash is submitted to L1 by op-batcher, so a challenge mechanism for blob is planned. +2. For L2 BLOB tx, only BLOB hash is submitted to L1 by op-batcher, so a challenge mechanism for BLOB is planned. The op-geth part mainly includes: -1. Add `EnableL2Blob` field to `OptimismConfig` so that if configured, L2 blob tx will be supported. -2. Add `blobs` field to `RollupCostData` and update [`newL1CostFuncEcotone`](https://github.com/blockchaindevsh/op-geth/blob/19971ab7ffd0b6879796daf8c05b3206e279f15d/core/types/rollup_cost.go#L191) so that a blob tx will have two extra fees: da fee and da proof fee. +1. Add `EnableL2Blob` field to `OptimismConfig` so that if configured, L2 BLOB tx will be supported. +2. Add `blobs` field to `RollupCostData` and update [`newL1CostFuncEcotone`](https://github.com/blockchaindevsh/op-geth/blob/19971ab7ffd0b6879796daf8c05b3206e279f15d/core/types/rollup_cost.go#L191) so that a BLOB tx will have two extra fees: da fee and da proof fee. 3. Fix [`Transaction.RollupCostData`](https://github.com/blockchaindevsh/op-geth/blob/19971ab7ffd0b6879796daf8c05b3206e279f15d/core/types/transaction.go#L374) so that the result is consistent when called from worker and state processor. -4. [`commitBlobTransaction`](https://github.com/blockchaindevsh/op-geth/blob/19971ab7ffd0b6879796daf8c05b3206e279f15d/miner/worker.go#L806) is modified to support blob tx without blobs when deriving. -5. Port changes from upstream geth to support estimate gas for blob tx. +4. [`commitBlobTransaction`](https://github.com/blockchaindevsh/op-geth/blob/19971ab7ffd0b6879796daf8c05b3206e279f15d/miner/worker.go#L806) is modified to support BLOB tx without blobs when deriving. +5. Port changes from upstream geth to support estimate gas for BLOB tx. ## Reference Implementation