forked from cerc-io/laconicd-deprecated
Finish state object implementation
This commit is contained in:
Aleksandr Bezobchuk
parent
be81045e26
commit
b77d74f405
@ -52,21 +52,9 @@ type (
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suicided bool
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deleted bool
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}
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// // Account is the Ethereum consensus representation of accounts.
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// // These objects are stored in the main account trie.
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// Account struct {
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// Nonce uint64
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// Balance *big.Int
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// Root ethcmn.Hash // merkle root of the storage trie
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// CodeHash []byte
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// }
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)
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func newObject(db *CommitStateDB, accProto auth.Account) *stateObject {
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// if acc.Balance == nil {
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// data.Balance = new(big.Int)
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// }
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acc, ok := accProto.(*types.Account)
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if !ok {
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panic(fmt.Sprintf("invalid account type for state object: %T", acc))
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@ -85,13 +73,9 @@ func newObject(db *CommitStateDB, accProto auth.Account) *stateObject {
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}
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}
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// Address returns the address of the state object.
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func (so stateObject) Address() ethcmn.Address {
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return so.address
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}
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// GetState retrieves a value from the account storage trie.
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func (so *stateObject) GetState(_ Database, key ethcmn.Hash) ethcmn.Hash {
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// GetState retrieves a value from the account storage trie. Note, the key must
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// be prefixed with the address.
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func (so *stateObject) GetState(_ ethstate.Database, key ethcmn.Hash) ethcmn.Hash {
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// if we have a dirty value for this state entry, return it
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value, dirty := so.dirtyStorage[key]
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if dirty {
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@ -99,11 +83,33 @@ func (so *stateObject) GetState(_ Database, key ethcmn.Hash) ethcmn.Hash {
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}
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// otherwise return the entry's original value
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return so.getCommittedState(key)
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return so.getCommittedState(so.stateDB.ctx, key)
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}
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// SetState updates a value in account storage.
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func (so *stateObject) SetState(db Database, key, value ethcmn.Hash) {
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// GetCommittedState retrieves a value from the committed account storage trie.
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// Note, the must be prefixed with the address.
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func (so *stateObject) getCommittedState(ctx sdk.Context, key ethcmn.Hash) ethcmn.Hash {
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// if we have the original value cached, return that
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value, cached := so.originStorage[key]
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if cached {
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return value
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}
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// otherwise load the value from the KVStore
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store := ctx.KVStore(so.stateDB.storageKey)
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rawValue := store.Get(key.Bytes())
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if len(rawValue) > 0 {
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value.SetBytes(rawValue)
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}
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so.originStorage[key] = value
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return value
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}
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// SetState updates a value in account storage. Note, the key must be prefixed
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// with the address.
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func (so *stateObject) SetState(db ethstate.Database, key, value ethcmn.Hash) {
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// if the new value is the same as old, don't set
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prev := so.GetState(db, key)
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if prev == value {
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@ -120,6 +126,50 @@ func (so *stateObject) SetState(db Database, key, value ethcmn.Hash) {
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so.setState(key, value)
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}
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func (so *stateObject) setState(key, value ethcmn.Hash) {
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so.dirtyStorage[key] = value
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}
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// Code returns the contract code associated with this object, if any.
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func (so *stateObject) Code(_ ethstate.Database) []byte {
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if so.code != nil {
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return so.code
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}
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if bytes.Equal(so.CodeHash(), emptyCodeHash) {
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return nil
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}
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store := so.stateDB.ctx.KVStore(so.stateDB.codeKey)
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code := store.Get(so.CodeHash())
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if len(code) == 0 {
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so.setError(fmt.Errorf("failed to get code hash %x for address: %x", so.CodeHash(), so.Address()))
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}
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so.code = code
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return code
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}
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// SetCode sets the state object's code.
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func (so *stateObject) SetCode(codeHash ethcmn.Hash, code []byte) {
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prevcode := so.Code(nil)
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so.stateDB.journal.append(codeChange{
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account: &so.address,
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prevhash: so.CodeHash(),
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prevcode: prevcode,
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})
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so.setCode(codeHash, code)
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}
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func (so *stateObject) setCode(codeHash ethcmn.Hash, code []byte) {
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so.code = code
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so.account.CodeHash = codeHash.Bytes()
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so.dirtyCode = true
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}
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// AddBalance adds an amount to a state object's balance. It is used to add
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// funds to the destination account of a transfer.
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func (so *stateObject) AddBalance(amount *big.Int) {
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@ -139,6 +189,20 @@ func (so *stateObject) AddBalance(amount *big.Int) {
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so.SetBalance(newBalance.BigInt())
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}
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// SubBalance removes an amount from the stateObject's balance. It is used to
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// remove funds from the origin account of a transfer.
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func (so *stateObject) SubBalance(amount *big.Int) {
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amt := sdk.NewIntFromBigInt(amount)
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if amt.Sign() == 0 {
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return
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}
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newBalance := so.account.Balance().Sub(amt)
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so.SetBalance(newBalance.BigInt())
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}
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// SetBalance sets the state object's balance.
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func (so *stateObject) SetBalance(amount *big.Int) {
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amt := sdk.NewIntFromBigInt(amount)
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@ -150,74 +214,46 @@ func (so *stateObject) SetBalance(amount *big.Int) {
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so.setBalance(amt)
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}
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// SubBalance removes amount from c's balance.
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// It is used to remove funds from the origin account of a transfer.
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func (so *stateObject) SubBalance(amount *big.Int) {
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if amount.Sign() == 0 {
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return
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}
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c.SetBalance(new(big.Int).Sub(c.Balance(), amount))
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}
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// func (so *stateObject) Balance() *big.Int {
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// }
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// func (so *stateObject) ReturnGas(gas *big.Int) {
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// }
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// func (so *stateObject) Address() ethcmn.Address {
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// }
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// func (so *stateObject) SetCode(codeHash ethcmn.Hash, code []byte) {
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// }
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// func (so *stateObject) SetNonce(nonce uint64) {
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// }
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// func (so *stateObject) Nonce() uint64 {
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// }
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// func (so *stateObject) Code(db Database) []byte {
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// }
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// func (so *stateObject) CodeHash() []byte {
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// }
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func (so *stateObject) setBalance(amount sdk.Int) {
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so.account.SetBalance(amount)
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}
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// GetCommittedState retrieves a value from the committed account storage trie.
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func (so *stateObject) getCommittedState(key ethcmn.Hash) ethcmn.Hash {
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// if we have the original value cached, return that
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value, cached := so.originStorage[key]
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if cached {
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return value
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}
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// otherwise load the value from the KVStore
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store := so.stateDB.ctx.KVStore(so.stateDB.storageKey)
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rawValue := store.Get(key.Bytes())
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if len(rawValue) > 0 {
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value.SetBytes(rawValue)
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}
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so.originStorage[key] = value
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return value
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// Balance returns the state object's current balance.
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func (so *stateObject) Balance() *big.Int {
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return so.account.Balance().BigInt()
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}
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func (so *stateObject) setState(key, value ethcmn.Hash) {
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so.dirtyStorage[key] = value
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// ReturnGas returns the gas back to the origin. Used by the Virtual machine or
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// Closures. It performs a no-op.
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func (so *stateObject) ReturnGas(gas *big.Int) {}
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// Address returns the address of the state object.
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func (so stateObject) Address() ethcmn.Address {
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return so.address
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}
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// CodeHash returns the state object's code hash.
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func (so *stateObject) CodeHash() []byte {
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return so.account.CodeHash
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}
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// Nonce returns the state object's current nonce (sequence number).
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func (so *stateObject) Nonce() uint64 {
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return uint64(so.account.Sequence)
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}
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// SetNonce sets the state object's nonce (sequence number).
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func (so *stateObject) SetNonce(nonce uint64) {
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so.stateDB.journal.append(nonceChange{
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account: &so.address,
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prev: so.account.Sequence,
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})
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so.setNonce(int64(nonce))
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}
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func (so *stateObject) setNonce(nonce int64) {
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so.account.Sequence = nonce
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}
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// setError remembers the first non-nil error it is called with.
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@ -245,3 +281,14 @@ func (so *stateObject) touch() {
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so.stateDB.journal.dirty(so.address)
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}
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}
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// prefixStorageKey prefixes a storage key with the state object's address.
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func (so stateObject) prefixStorageKey(key []byte) []byte {
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prefix := so.Address().Bytes()
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compositeKey := make([]byte, len(prefix)+len(key))
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copy(compositeKey, prefix)
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copy(compositeKey[len(prefix):], key)
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return compositeKey
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}
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