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core/state: access trie through Database interface, track errors (#14589)

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With this commit, core/state's access to the underlying key/value database is
mediated through an interface. Database errors are tracked in StateDB and
returned by CommitTo or the new Error method.

Motivation for this change: We can remove the light client's duplicated copy of
core/state. The light client now supports node iteration, so tracing and storage
enumeration can work with the light client (not implemented in this commit).
This commit is contained in:
Felix Lange
2017-06-27 15:57:06 +02:00
committed by GitHub
parent bb366271fe
commit 9e5f03b6c4
49 changed files with 810 additions and 1664 deletions
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38
core/blockchain.go
View File

@ -92,7 +92,7 @@ type BlockChain struct {
currentBlock *types.Block // Current head of the block chain
currentFastBlock *types.Block // Current head of the fast-sync chain (may be above the block chain!)
stateCache *state.StateDB // State database to reuse between imports (contains state cache)
stateCache state.Database // State database to reuse between imports (contains state cache)
bodyCache *lru.Cache // Cache for the most recent block bodies
bodyRLPCache *lru.Cache // Cache for the most recent block bodies in RLP encoded format
blockCache *lru.Cache // Cache for the most recent entire blocks
@ -125,6 +125,7 @@ func NewBlockChain(chainDb ethdb.Database, config *params.ChainConfig, engine co
bc := &BlockChain{
config: config,
chainDb: chainDb,
stateCache: state.NewDatabase(chainDb),
eventMux: mux,
quit: make(chan struct{}),
bodyCache: bodyCache,
@ -190,7 +191,7 @@ func (bc *BlockChain) loadLastState() error {
return bc.Reset()
}
// Make sure the state associated with the block is available
if _, err := state.New(currentBlock.Root(), bc.chainDb); err != nil {
if _, err := state.New(currentBlock.Root(), bc.stateCache); err != nil {
// Dangling block without a state associated, init from scratch
log.Warn("Head state missing, resetting chain", "number", currentBlock.Number(), "hash", currentBlock.Hash())
return bc.Reset()
@ -214,12 +215,6 @@ func (bc *BlockChain) loadLastState() error {
bc.currentFastBlock = block
}
}
// Initialize a statedb cache to ensure singleton account bloom filter generation
statedb, err := state.New(bc.currentBlock.Root(), bc.chainDb)
if err != nil {
return err
}
bc.stateCache = statedb
// Issue a status log for the user
headerTd := bc.GetTd(currentHeader.Hash(), currentHeader.Number.Uint64())
@ -261,7 +256,7 @@ func (bc *BlockChain) SetHead(head uint64) error {
bc.currentBlock = bc.GetBlock(currentHeader.Hash(), currentHeader.Number.Uint64())
}
if bc.currentBlock != nil {
if _, err := state.New(bc.currentBlock.Root(), bc.chainDb); err != nil {
if _, err := state.New(bc.currentBlock.Root(), bc.stateCache); err != nil {
// Rewound state missing, rolled back to before pivot, reset to genesis
bc.currentBlock = nil
}
@ -384,7 +379,7 @@ func (bc *BlockChain) State() (*state.StateDB, error) {
// StateAt returns a new mutable state based on a particular point in time.
func (bc *BlockChain) StateAt(root common.Hash) (*state.StateDB, error) {
return bc.stateCache.New(root)
return state.New(root, bc.stateCache)
}
// Reset purges the entire blockchain, restoring it to its genesis state.
@ -531,7 +526,7 @@ func (bc *BlockChain) HasBlockAndState(hash common.Hash) bool {
return false
}
// Ensure the associated state is also present
_, err := state.New(block.Root(), bc.chainDb)
_, err := bc.stateCache.OpenTrie(block.Root())
return err == nil
}
@ -959,31 +954,30 @@ func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
}
// Create a new statedb using the parent block and report an
// error if it fails.
switch {
case i == 0:
err = bc.stateCache.Reset(bc.GetBlock(block.ParentHash(), block.NumberU64()-1).Root())
default:
err = bc.stateCache.Reset(chain[i-1].Root())
var parent *types.Block
if i == 0 {
parent = bc.GetBlock(block.ParentHash(), block.NumberU64()-1)
} else {
parent = chain[i-1]
}
state, err := state.New(parent.Root(), bc.stateCache)
if err != nil {
bc.reportBlock(block, nil, err)
return i, err
}
// Process block using the parent state as reference point.
receipts, logs, usedGas, err := bc.processor.Process(block, bc.stateCache, bc.vmConfig)
receipts, logs, usedGas, err := bc.processor.Process(block, state, bc.vmConfig)
if err != nil {
bc.reportBlock(block, receipts, err)
return i, err
}
// Validate the state using the default validator
err = bc.Validator().ValidateState(block, bc.GetBlock(block.ParentHash(), block.NumberU64()-1), bc.stateCache, receipts, usedGas)
err = bc.Validator().ValidateState(block, parent, state, receipts, usedGas)
if err != nil {
bc.reportBlock(block, receipts, err)
return i, err
}
// Write state changes to database
_, err = bc.stateCache.Commit(bc.config.IsEIP158(block.Number()))
if err != nil {
if _, err = state.CommitTo(bc.chainDb, bc.config.IsEIP158(block.Number())); err != nil {
return i, err
}
@ -1021,7 +1015,7 @@ func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
return i, err
}
// Write hash preimages
if err := WritePreimages(bc.chainDb, block.NumberU64(), bc.stateCache.Preimages()); err != nil {
if err := WritePreimages(bc.chainDb, block.NumberU64(), state.Preimages()); err != nil {
return i, err
}
case SideStatTy: