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byte-list for opaque transaction payload

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Danny Ryan 2021-03-26 13:20:23 -06:00
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specs/merge/beacon-chain.md
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@ -39,6 +39,14 @@
This is a patch implementing the executable beacon chain proposal.
It enshrines application-layer execution and validity as a first class citizen at the core of the beacon chain.
## Custom types
We define the following Python custom types for type hinting and readability:
| Name | SSZ equivalent | Description |
| - | - | - |
| `OpaqueTransaction` | `ByteList[MAX_BYTES_PER_OPAQUE_TRANSACTION]` | a byte-list containing a single [typed transaction envelope](https://eips.ethereum.org/EIPS/eip-2718#opaque-byte-array-rather-than-an-rlp-array) structured as `TransactionType \|\| TransactionPayload` |
## Constants
### Transition
@ -51,11 +59,10 @@ It enshrines application-layer execution and validity as a first class citizen a
| Name | Value |
| - | - |
| `MAX_BYTES_PER_TRANSACTION_PAYLOAD` | `uint64(2**20)` (= 1,048,576) |
| `MAX_BYTES_PER_OPAQUE_TRANSACTION` | `uint64(2**20)` (= 1,048,576) |
| `MAX_APPLICATION_TRANSACTIONS` | `uint64(2**14)` (= 16,384) |
| `BYTES_PER_LOGS_BLOOM` | `uint64(2**8)` (= 256) |
## Containers
### Extended containers
@ -85,26 +92,9 @@ class BeaconState(phase0.BeaconState):
### New containers
#### `Transaction`
Application transaction fields structured as an SSZ object for inclusion in an `ApplicationPayload` contained within a `BeaconBlockBody`.
```python
class Transaction(Container):
nonce: uint64
gas_price: uint256
gas_limit: uint64
recipient: Bytes20
value: uint256
data: ByteList[MAX_BYTES_PER_TRANSACTION_PAYLOAD]
v: uint256
r: uint256
s: uint256
```
#### `ApplicationPayload`
The application payload included in a `BeaconBlock`.
The application payload included in a `BeaconBlockBody`.
```python
class ApplicationPayload(Container):
@ -115,7 +105,7 @@ class ApplicationPayload(Container):
gas_used: uint64
receipt_root: Bytes32
logs_bloom: ByteVector[BYTES_PER_LOGS_BLOOM]
transactions: List[Transaction, MAX_APPLICATION_TRANSACTIONS]
transactions: List[OpaqueTransaction, MAX_APPLICATION_TRANSACTIONS]
```
## Helper functions