0g-chain/tests/e2e/testutil/init_evm.go

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package testutil
import (
"context"
"fmt"
"math/big"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/common"
ethtypes "github.com/ethereum/go-ethereum/core/types"
"github.com/kava-labs/kava/tests/e2e/contracts/greeter"
"github.com/kava-labs/kava/tests/util"
)
// InitKavaEvmData is run after the chain is running, but before the tests are run.
// It is used to initialize some EVM state, such as deploying contracts.
func (suite *E2eTestSuite) InitKavaEvmData() {
whale := suite.Kava.GetAccount(FundedAccountName)
// ensure funded account has nonzero erc20 balance
balance := suite.GetErc20Balance(whale.EvmAddress)
if balance.Cmp(big.NewInt(0)) != 1 {
panic(fmt.Sprintf("expected funded account (%s) to have erc20 balance", whale.EvmAddress.Hex()))
}
// deploy an example contract
greeterAddr, _, _, err := greeter.DeployGreeter(
whale.evmSigner.Auth,
whale.evmSigner.EvmClient,
"what's up!",
)
suite.NoError(err, "failed to deploy a contract to the EVM")
suite.Kava.ContractAddrs["greeter"] = greeterAddr
}
func (suite *E2eTestSuite) FundKavaErc20Balance(toAddress common.Address, amount *big.Int) EvmTxResponse {
// funded account should have erc20 balance
whale := suite.Kava.GetAccount(FundedAccountName)
data := util.BuildErc20TransferCallData(whale.EvmAddress, toAddress, amount)
nonce, err := suite.Kava.EvmClient.PendingNonceAt(context.Background(), whale.EvmAddress)
suite.NoError(err)
req := util.EvmTxRequest{
Tx: ethtypes.NewTransaction(nonce, suite.DeployedErc20Address, big.NewInt(0), 1e5, big.NewInt(1e10), data),
Data: fmt.Sprintf("fund %s with ERC20 balance (%s)", toAddress.Hex(), amount.String()),
}
return whale.SignAndBroadcastEvmTx(req)
}
func (suite *E2eTestSuite) GetErc20Balance(address common.Address) *big.Int {
resData, err := suite.Kava.EvmClient.CallContract(context.Background(), ethereum.CallMsg{
To: &suite.DeployedErc20Address,
Data: util.BuildErc20BalanceOfCallData(address),
}, nil)
suite.NoError(err)
return new(big.Int).SetBytes(resData)
}