mirror of https://github.com/poanetwork/quorum.git
87 lines
2.4 KiB
Go
87 lines
2.4 KiB
Go
package core
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import (
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"crypto/ecdsa"
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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)
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// privateTestTx stubs transaction so that it can be flagged as private or not
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type privateTestTx struct {
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*types.Transaction
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private bool
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}
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// IsPrivate returns whether the transaction should be considered privat.
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func (ptx *privateTestTx) IsPrivate() bool { return ptx.private }
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// callHelper makes it easier to do proper calls and use the state transition object.
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// It also manages the nonces of the caller and keeps private and public state, which
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// can be freely modified outside of the helper.
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type callHelper struct {
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db ethdb.Database
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nonces map[common.Address]uint64
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header types.Header
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gp *GasPool
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PrivateState, PublicState *state.StateDB
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}
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// TxNonce returns the pending nonce
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func (cg *callHelper) TxNonce(addr common.Address) uint64 {
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return cg.nonces[addr]
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}
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// MakeCall makes does a call to the recipient using the given input. It can switch between private and public
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// by setting the private boolean flag. It returns an error if the call failed.
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func (cg *callHelper) MakeCall(private bool, key *ecdsa.PrivateKey, to common.Address, input []byte) error {
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var (
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from = crypto.PubkeyToAddress(key.PublicKey)
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ptx = privateTestTx{private: private}
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err error
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)
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ptx.Transaction, err = types.NewTransaction(cg.TxNonce(from), to, new(big.Int), big.NewInt(1000000), new(big.Int), input).SignECDSA(key)
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if err != nil {
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return err
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}
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defer func() { cg.nonces[from]++ }()
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publicState, privateState := cg.PublicState, cg.PrivateState
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if !private {
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privateState = publicState
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}
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_, _, err = ApplyMessage(NewEnv(publicState, privateState, &ChainConfig{}, nil, ptx.Transaction, &cg.header, vm.Config{}), ptx, cg.gp)
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if err != nil {
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return err
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}
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return nil
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}
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// MakeCallHelper returns a new callHelper
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func MakeCallHelper() *callHelper {
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db, _ := ethdb.NewMemDatabase()
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publicState, err := state.New(common.Hash{}, db)
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if err != nil {
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panic(err)
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}
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privateState, err := state.New(common.Hash{}, db)
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if err != nil {
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panic(err)
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}
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cg := &callHelper{
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nonces: make(map[common.Address]uint64),
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gp: new(GasPool).AddGas(big.NewInt(5000000)),
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PublicState: publicState,
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PrivateState: privateState,
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}
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return cg
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}
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