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les, les/lespay: implement new server pool (#20758)

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This PR reimplements the light client server pool. It is also a first step
to move certain logic into a new lespay package. This package will contain
the implementation of the lespay token sale functions, the token buying and
selling logic and other components related to peer selection/prioritization
and service quality evaluation. Over the long term this package will be
reusable for incentivizing future protocols.

Since the LES peer logic is now based on enode.Iterator, it can now use
DNS-based fallback discovery to find servers.

This document describes the function of the new components:
https://gist.github.com/zsfelfoldi/3c7ace895234b7b345ab4f71dab102d4
This commit is contained in:
Felföldi Zsolt
2020-05-22 13:46:34 +02:00
committed by GitHub
parent 65ce550b37
commit b4a2681120
30 changed files with 2904 additions and 1028 deletions
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18
core/forkid/forkid.go
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@ -27,7 +27,7 @@ import (
"strings"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
)
@ -44,6 +44,18 @@ var (
ErrLocalIncompatibleOrStale = errors.New("local incompatible or needs update")
)
// Blockchain defines all necessary method to build a forkID.
type Blockchain interface {
// Config retrieves the chain's fork configuration.
Config() *params.ChainConfig
// Genesis retrieves the chain's genesis block.
Genesis() *types.Block
// CurrentHeader retrieves the current head header of the canonical chain.
CurrentHeader() *types.Header
}
// ID is a fork identifier as defined by EIP-2124.
type ID struct {
Hash [4]byte // CRC32 checksum of the genesis block and passed fork block numbers
@ -54,7 +66,7 @@ type ID struct {
type Filter func(id ID) error
// NewID calculates the Ethereum fork ID from the chain config and head.
func NewID(chain *core.BlockChain) ID {
func NewID(chain Blockchain) ID {
return newID(
chain.Config(),
chain.Genesis().Hash(),
@ -85,7 +97,7 @@ func newID(config *params.ChainConfig, genesis common.Hash, head uint64) ID {
// NewFilter creates a filter that returns if a fork ID should be rejected or not
// based on the local chain's status.
func NewFilter(chain *core.BlockChain) Filter {
func NewFilter(chain Blockchain) Filter {
return newFilter(
chain.Config(),
chain.Genesis().Hash(),