84 lines
2.3 KiB
Go
84 lines
2.3 KiB
Go
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package statediff
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import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/state"
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// "github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/trie"
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plugeth "github.com/openrelayxyz/plugeth-utils/core"
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// plugeth_trie "github.com/openrelayxyz/plugeth-utils/restricted/trie"
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"github.com/cerc-io/plugeth-statediff/adapt"
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)
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// Exposes a minimal interface for state access for diff building
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type StateView interface {
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OpenTrie(root common.Hash) (StateTrie, error)
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ContractCode(codeHash common.Hash) ([]byte, error)
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}
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// StateTrie is an interface exposing only the necessary methods from state.Trie
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type StateTrie interface {
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GetKey([]byte) []byte
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// GetAccount(common.Address) (*types.StateAccount, error)
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// Hash() common.Hash
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NodeIterator([]byte) trie.NodeIterator
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// Prove(key []byte, fromLevel uint, proofDb KeyValueWriter) error
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}
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// exposes a StateView from a combination of plugeth's core Backend and cached contract code
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type plugethStateView struct {
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b plugeth.Backend
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code map[common.Hash][]byte
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}
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var _ StateView = &plugethStateView{}
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func (p *plugethStateView) OpenTrie(root common.Hash) (StateTrie, error) {
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t, err := p.b.GetTrie(plugeth.Hash(root))
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if err != nil {
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return nil, err
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}
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return adaptTrie{t}, nil
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}
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func (p *plugethStateView) ContractCode(hash common.Hash) ([]byte, error) {
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return p.code[hash], nil
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}
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// adapts a state.Database to StateView - used in tests
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type stateDatabaseView struct {
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db state.Database
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}
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var _ StateView = stateDatabaseView{}
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func StateDatabaseView(db state.Database) StateView {
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return stateDatabaseView{db}
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}
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func (a stateDatabaseView) OpenTrie(root common.Hash) (StateTrie, error) {
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// return adaptTrie{a.db.OpenTrie(common.Hash(root))}
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return a.db.OpenTrie(common.Hash(root))
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}
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func (a stateDatabaseView) ContractCode(hash common.Hash) ([]byte, error) {
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return a.db.ContractCode(common.Hash{}, hash)
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}
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// adapts geth Trie to plugeth
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type adaptTrie struct {
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plugeth.Trie
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}
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var _ StateTrie = adaptTrie{}
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// func (a adaptTrie) GetAccount(addr *types.StateAccount) (*plugeth.StateAccount, error) {
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// return adapt.StateAccount(a.Trie.GetAccount(addr))
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// }
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func (a adaptTrie) NodeIterator(start []byte) trie.NodeIterator {
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return adapt.NodeIterator(a.Trie.NodeIterator(start))
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}
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