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package main
import (
"fmt"
. "github.com/tendermint/tendermint/common"
. "github.com/tendermint/tendermint/vm"
"github.com/tendermint/tendermint/vm/sha3"
)
type FakeAppState struct {
accounts map[string]*Account
storage map[string]Word
logs []*Log
}
func (fas *FakeAppState) GetAccount(addr Word) (*Account, error) {
account := fas.accounts[addr.String()]
if account != nil {
return account, nil
} else {
return nil, Errorf("Invalid account addr: %v", addr)
}
}
func (fas *FakeAppState) UpdateAccount(account *Account) error {
_, ok := fas.accounts[account.Address.String()]
if !ok {
return Errorf("Invalid account addr: %v", account.Address.String())
} else {
// Nothing to do
return nil
}
}
func (fas *FakeAppState) DeleteAccount(account *Account) error {
_, ok := fas.accounts[account.Address.String()]
if !ok {
return Errorf("Invalid account addr: %v", account.Address.String())
} else {
// Delete account
delete(fas.accounts, account.Address.String())
return nil
}
}
func (fas *FakeAppState) CreateAccount(creator *Account) (*Account, error) {
addr := createAddress(creator)
account := fas.accounts[addr.String()]
if account == nil {
return &Account{
Address: addr,
Balance: 0,
Code: nil,
Nonce: 0,
StorageRoot: Zero,
}, nil
} else {
return nil, Errorf("Invalid account addr: %v", addr)
}
}
func (fas *FakeAppState) GetStorage(addr Word, key Word) (Word, error) {
_, ok := fas.accounts[addr.String()]
if !ok {
return Zero, Errorf("Invalid account addr: %v", addr)
}
value, ok := fas.storage[addr.String()+key.String()]
if ok {
return value, nil
} else {
return Zero, nil
}
}
func (fas *FakeAppState) SetStorage(addr Word, key Word, value Word) (bool, error) {
_, ok := fas.accounts[addr.String()]
if !ok {
return false, Errorf("Invalid account addr: %v", addr)
}
_, ok = fas.storage[addr.String()+key.String()]
fas.storage[addr.String()+key.String()] = value
return ok, nil
}
func (fas *FakeAppState) AddLog(log *Log) {
fas.logs = append(fas.logs, log)
}
func main() {
appState := &FakeAppState{
accounts: make(map[string]*Account),
storage: make(map[string]Word),
logs: nil,
}
params := Params{
BlockHeight: 0,
BlockHash: Zero,
BlockTime: 0,
GasLimit: 0,
}
ourVm := NewVM(appState, params, Zero)
// Create accounts
account1 := &Account{
Address: Uint64ToWord(100),
}
account2 := &Account{
Address: Uint64ToWord(101),
}
var gas uint64 = 1000
output, err := ourVm.Call(account1, account2, []byte{0x5B, 0x60, 0x00, 0x56}, []byte{}, 0, &gas)
fmt.Printf("Output: %v Error: %v\n", output, err)
}
// Creates a 20 byte address and bumps the nonce.
func createAddress(creator *Account) Word {
nonce := creator.Nonce
creator.Nonce += 1
temp := make([]byte, 32+8)
copy(temp, creator.Address[:])
PutUint64(temp[32:], nonce)
return RightPadWord(sha3.Sha3(temp)[:20])
}