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changes required for EIP-7742 #574

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7e57676
changes required for EIP-7742
ralexstokes Aug 21, 2024
ec49a5f
provide `maximumBlobCount` for payload construction
ralexstokes Aug 22, 2024
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39 changes: 37 additions & 2 deletions src/engine/prague.md
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ This specification is based on and extends [Engine API - Cancun](./cancun.md) sp
- [ConsolidationRequestV1](#consolidationrequestv1)
- [ExecutionPayloadV4](#executionpayloadv4)
- [ExecutionPayloadBodyV2](#executionpayloadbodyv2)
- [PayloadAttributesV4](#payloadattributesv4)
- [Methods](#methods)
- [engine_newPayloadV4](#engine_newpayloadv4)
- [Request](#request)
Expand All @@ -24,14 +25,18 @@ This specification is based on and extends [Engine API - Cancun](./cancun.md) sp
- [Request](#request-1)
- [Response](#response-1)
- [Specification](#specification-1)
- [engine_getPayloadBodiesByHashV2](#engine_getpayloadbodiesbyhashv2)
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- [engine_forkchoiceUpdatedV4](#engine_forkchoiceupdatedv4)
- [Request](#request-2)
- [Response](#response-2)
- [Specification](#specification-2)
- [engine_getPayloadBodiesByRangeV2](#engine_getpayloadbodiesbyrangev2)
- [engine_getPayloadBodiesByHashV2](#engine_getpayloadbodiesbyhashv2)
- [Request](#request-3)
- [Response](#response-3)
- [Specification](#specification-3)
- [engine_getPayloadBodiesByRangeV2](#engine_getpayloadbodiesbyrangev2)
- [Request](#request-4)
- [Response](#response-4)
- [Specification](#specification-4)
- [Update the methods of previous forks](#update-the-methods-of-previous-forks)

<!-- END doctoc generated TOC please keep comment here to allow auto update -->
Expand Down Expand Up @@ -103,6 +108,17 @@ This structure has the syntax of [`ExecutionPayloadBodyV1`](./shanghai.md#execut
- `withdrawalRequests`: `Array of WithdrawalRequestV1` - Array of withdrawal requests, each object is an `OBJECT` containing the fields of a `WithdrawalRequestV1` structure.
- `consolidationRequests`: `Array of ConsolidationRequestV1` - Array of consolidation requests, each object is an `OBJECT` containing the fields of a `ConsolidationRequestV1` structure.

### PayloadAttributesV4

This structure has the syntax of `PayloadAttributesV3` and appends a single field: `targetBlobCount`.

- `timestamp`: `QUANTITY`, 64 Bits - value for the `timestamp` field of the new payload
- `prevRandao`: `DATA`, 32 Bytes - value for the `prevRandao` field of the new payload
- `suggestedFeeRecipient`: `DATA`, 20 Bytes - suggested value for the `feeRecipient` field of the new payload
- `withdrawals`: `Array of WithdrawalV1` - Array of withdrawals, each object is an `OBJECT` containing the fields of a `WithdrawalV1` structure.
- `parentBeaconBlockRoot`: `DATA`, 32 Bytes - Root of the parent beacon block.
- `targetBlobCount`: `QUANTITY`, 64 Bits - Average number of blobs to include per payload.

## Methods

### engine_newPayloadV4
Expand All @@ -116,6 +132,7 @@ The request of this method is updated with [`ExecutionPayloadV4`](#ExecutionPayl
1. `executionPayload`: [`ExecutionPayloadV4`](#ExecutionPayloadV4).
2. `expectedBlobVersionedHashes`: `Array of DATA`, 32 Bytes - Array of expected blob versioned hashes to validate.
3. `parentBeaconBlockRoot`: `DATA`, 32 Bytes - Root of the parent beacon block.
4. `targetBlobCount`: `QUANTITY`, 64 Bits - Average number of blobs to include per payload.

#### Response

Expand Down Expand Up @@ -153,6 +170,24 @@ This method follows the same specification as [`engine_getPayloadV3`](./cancun.m

1. Client software **MUST** return `-38005: Unsupported fork` error if the `timestamp` of the built payload does not fall within the time frame of the Prague fork.

### engine_forkchoiceUpdatedV4

#### Request

* method: `engine_forkchoiceUpdatedV4`
* params:
1. `forkchoiceState`: [`ForkchoiceStateV1`](./paris.md#ForkchoiceStateV1).
2. `payloadAttributes`: `Object|null` - Instance of [`PayloadAttributesV4`](#payloadattributesv4) or `null`.
* timeout: 8s

#### Response

Refer to the response for [`engine_forkchoiceUpdatedV3`](./shanghai.md#engine_forkchoiceupdatedv3).

#### Specification

This method follows the same specification as [`engine_forkchoiceUpdatedV3`](./shanghai.md#engine_forkchoiceupdatedv3).

### engine_getPayloadBodiesByHashV2

The response of this method is updated with [`ExecutionPayloadBodyV2`](#executionpayloadbodyv2).
Expand Down
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