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authorFelix Lange <fjl@users.noreply.github.com>2017-06-27 21:57:06 +0800
committerGitHub <noreply@github.com>2017-06-27 21:57:06 +0800
commit9e5f03b6c487175cc5aa1224e5e12fd573f483a7 (patch)
tree475e573ff6c7e77cd069a2f6238afdb27d4bce43 /light/txpool.go
parentbb366271fe33cf87b462dc5a25ac6c448ac6d2e1 (diff)
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core/state: access trie through Database interface, track errors (#14589)
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).
Diffstat (limited to 'light/txpool.go')
-rw-r--r--light/txpool.go32
1 files changed, 13 insertions, 19 deletions
diff --git a/light/txpool.go b/light/txpool.go
index 7276874b8..0430b280f 100644
--- a/light/txpool.go
+++ b/light/txpool.go
@@ -24,6 +24,7 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
+ "github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
@@ -100,17 +101,18 @@ func NewTxPool(config *params.ChainConfig, eventMux *event.TypeMux, chain *Light
}
// currentState returns the light state of the current head header
-func (pool *TxPool) currentState() *LightState {
- return NewLightState(StateTrieID(pool.chain.CurrentHeader()), pool.odr)
+func (pool *TxPool) currentState(ctx context.Context) *state.StateDB {
+ return NewState(ctx, pool.chain.CurrentHeader(), pool.odr)
}
// GetNonce returns the "pending" nonce of a given address. It always queries
// the nonce belonging to the latest header too in order to detect if another
// client using the same key sent a transaction.
func (pool *TxPool) GetNonce(ctx context.Context, addr common.Address) (uint64, error) {
- nonce, err := pool.currentState().GetNonce(ctx, addr)
- if err != nil {
- return 0, err
+ state := pool.currentState(ctx)
+ nonce := state.GetNonce(addr)
+ if state.Error() != nil {
+ return 0, state.Error()
}
sn, ok := pool.nonce[addr]
if ok && sn > nonce {
@@ -357,13 +359,9 @@ func (pool *TxPool) validateTx(ctx context.Context, tx *types.Transaction) error
return core.ErrInvalidSender
}
// Last but not least check for nonce errors
- currentState := pool.currentState()
- if n, err := currentState.GetNonce(ctx, from); err == nil {
- if n > tx.Nonce() {
- return core.ErrNonceTooLow
- }
- } else {
- return err
+ currentState := pool.currentState(ctx)
+ if n := currentState.GetNonce(from); n > tx.Nonce() {
+ return core.ErrNonceTooLow
}
// Check the transaction doesn't exceed the current
@@ -382,12 +380,8 @@ func (pool *TxPool) validateTx(ctx context.Context, tx *types.Transaction) error
// Transactor should have enough funds to cover the costs
// cost == V + GP * GL
- if b, err := currentState.GetBalance(ctx, from); err == nil {
- if b.Cmp(tx.Cost()) < 0 {
- return core.ErrInsufficientFunds
- }
- } else {
- return err
+ if b := currentState.GetBalance(from); b.Cmp(tx.Cost()) < 0 {
+ return core.ErrInsufficientFunds
}
// Should supply enough intrinsic gas
@@ -395,7 +389,7 @@ func (pool *TxPool) validateTx(ctx context.Context, tx *types.Transaction) error
return core.ErrIntrinsicGas
}
- return nil
+ return currentState.Error()
}
// add validates a new transaction and sets its state pending if processable.