Crate polkadot_runtime_common

Common runtime code for Polkadot and Kusama.

Re-exports

pub use elections::OffchainSolutionLengthLimit;

pub use elections::OffchainSolutionWeightLimit;

pub use impls::ToAuthor;

Modules

auctions

Auctioning system to determine the set of Parachains in operation. This includes logic for the auctioning mechanism and for reserving balance as part of the “payment”. Unreserving the balance happens elsewhere.

claims

Pallet to process claims from Ethereum addresses.

crowdloan

Parachain Crowdloaning pallet

elections

Code for elections.

impls

Auxiliary struct/enums for polkadot runtime.

paras_registrar

Pallet to handle parathread/parachain registration and related fund management. In essence this is a simple wrapper around paras.

paras_sudo_wrapper

A simple wrapper allowing Sudo to call into paras routines.

purchase

Pallet to process purchase of DOTs.

slot_range

The SlotRange struct which succinctly handles the 36 values that represent all sub ranges between 0 and 7 inclusive.

slots

Parathread and parachains leasing system. Allows para IDs to be claimed, the code and data to be initialized and parachain slots (i.e. continuous scheduling) to be leased. Also allows for parachains and parathreads to be swapped.

traits

Traits used across pallets for Polkadot.

xcm_sender

XCM sender for relay chain.

Structs

AdjustmentVariable

The adjustment variable of the runtime. Higher values will cause TargetBlockFullness to change the fees more rapidly.

AssignmentSessionKeyPlaceholder

A placeholder since there is currently no provided session key handler for parachain validator keys.

BlockExecutionWeight

Importing a block with 0 txs takes ~5 ms

BlockHashCount

BlockLength

Maximum length of block. Up to 5MB.

BlockWeights

Block weights base values and limits.

ExtrinsicBaseWeight

Executing 10,000 System remarks (no-op) txs takes ~1.26 seconds -> ~125 µs per tx

MinimumMultiplier

Minimum amount of the multiplier. This value cannot be too low. A test case should ensure that combined with AdjustmentVariable, we can recover from the minimum. See multiplier_can_grow_from_zero.

ParachainSessionKeyPlaceholder

A placeholder since there is currently no provided session key handler for parachain validator keys.

RocksDbWeight

By default, Substrate uses RocksDB, so this will be the weight used throughout the runtime.

TargetBlockFullness

The portion of the NORMAL_DISPATCH_RATIO that we adjust the fees with. Blocks filled less than this will decrease the weight and more will increase.

Enums

BalancesCall

Contains one variant per dispatchable that can be called by an extrinsic.

StakerStatus

Indicates the initial status of the staker.

TimestampCall

Contains one variant per dispatchable that can be called by an extrinsic.

Constants

AVERAGE_ON_INITIALIZE_RATIO

We assume that an on-initialize consumes 1% of the weight on average, hence a single extrinsic will not be allowed to consume more than AvailableBlockRatio - 1%.

MAXIMUM_BLOCK_WEIGHT

We allow for 2 seconds of compute with a 6 second average block time.

Traits

BuildStorage

Complex storage builder stuff.

Type Definitions

CurrencyToVote

The type used for currency conversion.

NegativeImbalance

SlowAdjustingFeeUpdate

Parameterized slow adjusting fee updated based on https://w3f-research.readthedocs.io/en/latest/polkadot/Token%20Economics.html#-2.-slow-adjusting-mechanism