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