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Blob poster: add more optional parameters and reference to arbos20 docs #2365

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add more optional parameters and refer to arbos docs
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15 changes: 14 additions & 1 deletion ...ain/02-configure-your-chain/common-configurations/14-enable-post-4844-blobs.mdx
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Expand Up @@ -92,7 +92,20 @@ numBlobs=1

Your node may continue using calldata in these scenarios:

1. **Cost optimization**: When blob gas prices are high, calldata posting may be more economical
1. **Cost optimization**: When blob gas prices are high, calldata posting may be more economical, but you can set the `--node.batch-poster.ignore-blob-price` flag to `true` to force the batch poster to use blobs.
2. **Batch Type Switching Protection**: After a non-blob transaction is posted, the next 16 transactions will also use calldata to prevent frequent switching

Check your node logs for blob-related error messages and verify that your parent chain is accessible and fully synced.

## Optional parameters

You can also set the following optional parameters to control blob posting behavior:

| Flag | Description |
| ----------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `--node.batch-poster.ignore-blob-price` | Boolean. Default: `false`. If the parent chain supports EIP4844 blobs and `ignore-blob-price` is set to `true`, the batch poster will use EIP4844 blobs even if using calldata is cheaper. Can be `true` or `false`. |
| `--parent-chain.blob-client.authorization` | String. Default: `""`. Value to send with the HTTP Authorization: header for Beacon REST requests, must include both scheme and scheme parameters |
| `--parent-chain.blob-client.secondary-beacon-url` | String. Default: `""`. Value to send with the HTTP Authorization: header for Beacon REST requests, must include both scheme and scheme parameters |
| `--node.batch-poster.data-poster.blob-tx-replacement-times` | durationSlice. Default: `[5m0s,10m0s,30m0s,1h0m0s,4h0m0s,8h0m0s,16h0m0s,22h0m0s]`. comma-separated list of durations since first posting a blob transaction to attempt a replace-by-fee |
| `--node.batch-poster.data-poster.max-blob-tx-tip-cap-gwei` | float. Default: `1`. the maximum tip cap to post EIP-4844 blob carrying transactions at |
| `--node.batch-poster.data-poster.min-blob-tx-tip-cap-gwei` | float. Default: `1`. the minimum tip cap to post EIP-4844 blob carrying transactions at |
24 changes: 1 addition & 23 deletions arbitrum-docs/run-arbitrum-node/arbos-releases/arbos20.mdx
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Expand Up @@ -49,29 +49,7 @@ This section maps to [Step 4 in the guide on _How to upgrade ArbOS on your Arbit
:::caution
Before proceeding, make sure you have successfully completed Steps 1 through 3 of the guide on [How to upgrade ArbOS on your Arbitrum chain](/launch-arbitrum-chain/02-configure-your-chain/common-configurations/13-arbos-upgrade.mdx).

To enable the posting of transaction data in Blobs to L1 Ethereum, you must set `node.batch-poster.post-4844-blobs=true` on the batch poster.

#### Full list of ArbOS Atlas specific configuration options for Arbitrum chains

| Flag | Description |
| --------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `--node.batch-poster.post-4844-blobs` | Boolean. Default: `false`. Used to enable or disable the posting of transaction data using Blobs to L1 Ethereum. If using calldata is more expensive and if the parent chain supports EIP4844 blobs, the batch poster will use blobs when this flag is set to `true`. Can be `true` or `false`. |
| `--node.batch-poster.ignore-blob-price` | Boolean. Default: `false`. If the parent chain supports EIP4844 blobs and `ignore-blob-price` is set to `true`, the batch poster will use EIP4844 blobs even if using calldata is cheaper. Can be `true` or `false`. |

The above configurations are also available in the [Nitro command line options reference section](/run-arbitrum-node/03-run-full-node.mdx#optional-parameters) and can be set using the command line or using the JSON node configuration below:

```json
"node": {
...
"batch-poster": {
...
"post-4844-blobs": true,
"ignore-blob-price": false,
...
},
}

```
To enable the posting of transaction data in Blobs to L1 Ethereum, please refer to the [Enable post-4844 blobs](/launch-arbitrum-chain/02-configure-your-chain/common-configurations/14-enable-post-4844-blobs.mdx) section of the Arbitrum chain configuration guide.

### Reference links for ArbOS 20 Atlas

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