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simulator.go
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simulator.go
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package adapter
import (
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/accounts/abi/bind/backends"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/crypto"
"github.com/orbs-network/orbs-network-go/instrumentation/log"
"math/big"
"sync"
)
type EthereumSimulator struct {
connectorCommon
auth *bind.TransactOpts
mu struct {
sync.Mutex
simClient *backends.SimulatedBackend
}
}
func NewEthereumSimulatorConnection(logger log.BasicLogger) *EthereumSimulator {
// Generate a new random account and a funded simulator
key, err := crypto.GenerateKey()
if err != nil {
panic(err)
}
e := &EthereumSimulator{
auth: bind.NewKeyedTransactor(key),
}
e.logger = logger
e.getContractCaller = func() (EthereumCaller, error) {
e.mu.Lock()
defer e.mu.Unlock()
if e.mu.simClient == nil {
e.createClientAndInitAccount()
}
return e.mu.simClient, nil
}
return e
}
func (es *EthereumSimulator) createClientAndInitAccount() {
genesisAllocation := map[common.Address]core.GenesisAccount{
es.auth.From: {Balance: big.NewInt(10000000000)},
}
es.mu.simClient = backends.NewSimulatedBackend(genesisAllocation, 900000000000)
}
func (es *EthereumSimulator) GetAuth() *bind.TransactOpts {
// this is used for test code, not protecting this
return es.auth
}
func (es *EthereumSimulator) Commit() {
es.mu.simClient.Commit()
}