You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
3.2 KiB
74 lines
3.2 KiB
package consensus
|
|
|
|
import (
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/params"
|
|
"github.com/harmony-one/harmony/core/state"
|
|
"github.com/harmony-one/harmony/core/types"
|
|
)
|
|
|
|
// ChainReader defines a small collection of methods needed to access the local
|
|
// blockchain during header and/or uncle verification.
|
|
type ChainReader interface {
|
|
// Config retrieves the blockchain's chain configuration.
|
|
Config() *params.ChainConfig
|
|
|
|
// CurrentHeader retrieves the current header from the local chain.
|
|
CurrentHeader() *types.Header
|
|
|
|
// GetHeader retrieves a block header from the database by hash and number.
|
|
GetHeader(hash common.Hash, number uint64) *types.Header
|
|
|
|
// GetHeaderByNumber retrieves a block header from the database by number.
|
|
GetHeaderByNumber(number uint64) *types.Header
|
|
|
|
// GetHeaderByHash retrieves a block header from the database by its hash.
|
|
GetHeaderByHash(hash common.Hash) *types.Header
|
|
|
|
// GetBlock retrieves a block from the database by hash and number.
|
|
GetBlock(hash common.Hash, number uint64) *types.Block
|
|
}
|
|
|
|
// Engine is an algorithm agnostic consensus engine.
|
|
type Engine interface {
|
|
// Author retrieves the Ethereum address of the account that minted the given
|
|
// block, which may be different from the header's coinbase if a consensus
|
|
// engine is based on signatures.
|
|
Author(header *types.Header) (common.Address, error)
|
|
|
|
// VerifyHeader checks whether a header conforms to the consensus rules of a
|
|
// given engine. Verifying the seal may be done optionally here, or explicitly
|
|
// via the VerifySeal method.
|
|
VerifyHeader(chain ChainReader, header *types.Header, seal bool) error
|
|
|
|
// VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers
|
|
// concurrently. The method returns a quit channel to abort the operations and
|
|
// a results channel to retrieve the async verifications (the order is that of
|
|
// the input slice).
|
|
VerifyHeaders(chain ChainReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error)
|
|
|
|
// VerifySeal checks whether the crypto seal on a header is valid according to
|
|
// the consensus rules of the given engine.
|
|
VerifySeal(chain ChainReader, header *types.Header) error
|
|
|
|
// Prepare initializes the consensus fields of a block header according to the
|
|
// rules of a particular engine. The changes are executed inline.
|
|
Prepare(chain ChainReader, header *types.Header) error
|
|
|
|
// Finalize runs any post-transaction state modifications (e.g. block rewards)
|
|
// and assembles the final block.
|
|
// Note: The block header and state database might be updated to reflect any
|
|
// consensus rules that happen at finalization (e.g. block rewards).
|
|
Finalize(chain ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction,
|
|
receipts []*types.Receipt) (*types.Block, error)
|
|
|
|
// Seal generates a new sealing request for the given input block and pushes
|
|
// the result into the given channel.
|
|
//
|
|
// Note, the method returns immediately and will send the result async. More
|
|
// than one result may also be returned depending on the consensus algorithm.
|
|
Seal(chain ChainReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error
|
|
|
|
// SealHash returns the hash of a block prior to it being sealed.
|
|
SealHash(header *types.Header) common.Hash
|
|
}
|
|
|