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fake_app_state.go
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/
fake_app_state.go
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// Copyright 2017 Monax Industries Limited
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package evm
import (
"fmt"
"bytes"
"github.com/hyperledger/burrow/acm"
"github.com/hyperledger/burrow/acm/acmstate"
. "github.com/hyperledger/burrow/binary"
"github.com/hyperledger/burrow/crypto"
)
type FakeAppState struct {
accounts map[crypto.Address]*acm.Account
storage map[string]Word256
}
var _ acmstate.ReaderWriter = &FakeAppState{}
func (fas *FakeAppState) GetAccount(addr crypto.Address) (*acm.Account, error) {
account := fas.accounts[addr]
return account, nil
}
func (fas *FakeAppState) UpdateAccount(account *acm.Account) error {
fas.accounts[account.GetAddress()] = account
return nil
}
func (fas *FakeAppState) RemoveAccount(address crypto.Address) error {
_, ok := fas.accounts[address]
if !ok {
panic(fmt.Sprintf("Invalid account addr: %s", address))
} else {
// Remove account
delete(fas.accounts, address)
}
return nil
}
func (fas *FakeAppState) GetStorage(addr crypto.Address, key Word256) (Word256, error) {
_, ok := fas.accounts[addr]
if !ok {
panic(fmt.Sprintf("Invalid account addr: %s", addr))
}
value, ok := fas.storage[addr.String()+key.String()]
if ok {
return value, nil
} else {
return Zero256, nil
}
}
func (fas *FakeAppState) SetStorage(addr crypto.Address, key Word256, value Word256) error {
_, ok := fas.accounts[addr]
if !ok {
fmt.Println("\n\n", fas.accountsDump())
panic(fmt.Sprintf("Invalid account addr: %s", addr))
}
fas.storage[addr.String()+key.String()] = value
return nil
}
func (fas *FakeAppState) accountsDump() string {
buf := new(bytes.Buffer)
fmt.Fprint(buf, "Dumping accounts...", "\n")
for _, acc := range fas.accounts {
fmt.Fprint(buf, acc.GetAddress().String(), "\n")
}
return buf.String()
}