Add EIP-4844-B

network-upgrades/dencun.md

@@ -25,18 +25,20 @@ Note: The trusted setup required for [deneb's cryptography](https://github.com/e
 
 ### [EIP-4844](https://eips.ethereum.org/EIPS/eip-4844)
 
-Gnosis chain has slots significantly faster than Ethereum. Bigger blocks _could_ have a higher cost to the network than Ethereum so we may price blobs differently. Ethereum mainnet has chosen a target of 3 blobs from real live experiments on mainnet with big blocks. Consecuently this parameters may not be adecuate.
+Gnosis chain has slots significantly faster than Ethereum. Bigger blocks have a higher cost to the network than Ethereum so we reduce the blob count per block to a safer value. price blobs differently. Ethereum mainnet has chosen a target of 3 blobs from real live experiments on mainnet with big blocks. Consecuently this parameters may not be adecuate. We ran a big blocks experiment that informed the chosen parameters. See this [research doc](../research/dencun/eip-4844.md) for details on the experiment.
 
 Gnosis chain has significantly cheaper fees than mainnet, so blob spam is a concern. Ethereum's `MIN_BLOB_GASPRICE` makes blob space free (1e-18 USD / blob) if usage is under the target for a sustained period of time. The same concern applies to Ethereum, but consensus is that choosing a specific value that may apply to only some market conditions and not others. Given that Gnosis native token is a stable coin, this concerns are mitigated. Given usage under target for regular txs and blob data, setting min blob gas price to 1 GWei reduces the cost per byte by a factor of 16.
 
+Note that the blob gas fee is burned as defined by [EIP-4844](https://eips.ethereum.org/EIPS/eip-4844) spec. Gnosis adaptation of EIP-1559 collects transaction base fees on a predefined address. This behaviour will apply on blob gas fees on the next fork [pectra](../pectra.md).
+
 | Constant | Value |
 | -------- | ----- |
 | MIN_BLOB_GASPRICE | 1000000000 |
 | TARGET_BLOB_GAS_PER_BLOCK | 131072 |
 | MAX_BLOB_GAS_PER_BLOCK | 262144 |
 | BLOB_GASPRICE_UPDATE_FRACTION | 1112826 |
 
-See [rationale](../research/dencun/eip-7514.md) for chosen blob gas parameters.
+See [rationale](../research/dencun/eip-4844.md) for chosen blob gas parameters.
 
 ### [EIP-7514](https://eips.ethereum.org/EIPS/eip-7514)
 

network-upgrades/pectra.md

@@ -14,14 +14,19 @@ Table below list differences if any.
 | [EIP-7002](https://eips.ethereum.org/EIPS/eip-7002): Execution layer triggerable exits         | EL     | Not modified, same addresses as Ethereum
 | [EIP-7251](https://eips.ethereum.org/EIPS/eip-7251): Increase the MAX_EFFECTIVE_BALANCE        | CL     | Not modified
 | [EIP-7549](https://eips.ethereum.org/EIPS/eip-7549): Move committee index outside Attestation  | CL     | Not modified
+| [EIP-4844-B](https://eips.ethereum.org/EIPS/eip-4844): Shard Blob Transactions                 | CL     | Modified
 
 \* See [Differences with Ethereum mainnet](#differences-with-ethereum-mainnet)
 
 Note: The trusted setup required for [deneb's cryptography](https://github.com/ethereum/consensus-specs/blob/dev/specs/deneb/polynomial-commitments.md#trusted-setup) is the same as defined in Ethereum's consensus spec release v1.4.0, which can be found in [consensus/preset/gnosis/trusted_setups](./consensus/preset/gnosis/trusted_setups/trusted_setup_4096.json).
 
 ## Differences with Ethereum mainnet
 
-_TBA_
+### [EIP-4844-B](https://eips.ethereum.org/EIPS/eip-4844)
+
+Extends the modified Gnosis EIP-4844 as defined in the [dencun spec](../dencun.md) document. Starting at the fork timestamp, the blob base fee is collected instead of burned.
+
+The actual `blob_fee` as calculated via `calc_blob_fee` is deducted from the sender balance before transaction execution and credited to a pre-defined address. It is not refunded in case of transaction failure.
 
 ## Upgrade Schedule