imp(evm): define minimum GasUsed proportional to GasLimit (#1087)

* min gas denominator implementation

* update changelog

* modify MinGasDenominator type to sdk.Dec

* fix typo in comments

* add comments

* update comment

* refactor logic

* remove unnecesary test

* fix typo on proto

* rename param

* fix tests

* use truncate and run mod tidy

* comment to default value

* update changelog

* rename temporary gas used

* integration tests

* add migrations

* add default as var

Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>
This commit is contained in:
crypto-facs 2022-05-25 09:52:34 -04:00 committed by GitHub
parent f06df8c265
commit c4417713fa
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
15 changed files with 364 additions and 129 deletions

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@ -57,6 +57,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
### State Machine Breaking
* (ante) [tharsis#1060](https://github.com/tharsis/ethermint/pull/1060) Check `EnableCreate`/`EnableCall` in `AnteHandler` to short-circuit EVM transactions.
* (evm) [tharsis#1087](https://github.com/tharsis/ethermint/pull/1087) Minimum GasUsed proportional to GasLimit and `MinGasDenominator` EVM module param.
### API Breaking

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@ -227,6 +227,7 @@ Params defines the EVM module parameters
| `enable_call` | [bool](#bool) | | enable call toggles state transitions that use the vm.Call function |
| `extra_eips` | [int64](#int64) | repeated | extra eips defines the additional EIPs for the vm.Config |
| `chain_config` | [ChainConfig](#ethermint.evm.v1.ChainConfig) | | chain config defines the EVM chain configuration parameters |
| `min_gas_multiplier` | [string](#string) | | min gas denominator bounds the minimum gasUsed to be charged to senders based on GasLimit |

4
go.mod
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@ -31,7 +31,7 @@ require (
github.com/tendermint/tendermint v0.34.20-0.20220517115723-e6f071164839
github.com/tendermint/tm-db v0.6.7
github.com/tyler-smith/go-bip39 v1.1.0
google.golang.org/genproto v0.0.0-20220414192740-2d67ff6cf2b4
google.golang.org/genproto v0.0.0-20220518221133-4f43b3371335
google.golang.org/grpc v1.46.2
google.golang.org/protobuf v1.28.0
gopkg.in/yaml.v2 v2.4.0
@ -138,7 +138,7 @@ require (
github.com/tklauser/numcpus v0.2.2 // indirect
github.com/zondax/hid v0.9.0 // indirect
go.etcd.io/bbolt v1.3.6 // indirect
golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4 // indirect
golang.org/x/crypto v0.0.0-20220518034528-6f7dac969898 // indirect
golang.org/x/net v0.0.0-20220412020605-290c469a71a5 // indirect
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
golang.org/x/sys v0.0.0-20220412211240-33da011f77ad // indirect

7
go.sum
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@ -1241,8 +1241,9 @@ golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5y
golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20210915214749-c084706c2272/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4 h1:kUhD7nTDoI3fVd9G4ORWrbV5NY0liEs/Jg2pv5f+bBA=
golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/crypto v0.0.0-20220518034528-6f7dac969898 h1:SLP7Q4Di66FONjDJbCYrCRrh97focO6sLogHO7/g8F0=
golang.org/x/crypto v0.0.0-20220518034528-6f7dac969898/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/exp v0.0.0-20180321215751-8460e604b9de/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20180807140117-3d87b88a115f/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
@ -1731,8 +1732,8 @@ google.golang.org/genproto v0.0.0-20220304144024-325a89244dc8/go.mod h1:kGP+zUP2
google.golang.org/genproto v0.0.0-20220310185008-1973136f34c6/go.mod h1:kGP+zUP2Ddo0ayMi4YuN7C3WZyJvGLZRh8Z5wnAqvEI=
google.golang.org/genproto v0.0.0-20220324131243-acbaeb5b85eb/go.mod h1:hAL49I2IFola2sVEjAn7MEwsja0xp51I0tlGAf9hz4E=
google.golang.org/genproto v0.0.0-20220407144326-9054f6ed7bac/go.mod h1:8w6bsBMX6yCPbAVTeqQHvzxW0EIFigd5lZyahWgyfDo=
google.golang.org/genproto v0.0.0-20220414192740-2d67ff6cf2b4 h1:myaecH64R0bIEDjNORIel4iXubqzaHU1K2z8ajBwWcM=
google.golang.org/genproto v0.0.0-20220414192740-2d67ff6cf2b4/go.mod h1:8w6bsBMX6yCPbAVTeqQHvzxW0EIFigd5lZyahWgyfDo=
google.golang.org/genproto v0.0.0-20220518221133-4f43b3371335 h1:2D0OT6tPVdrQTOnVe1VQjfJPTED6EZ7fdJ/f6Db6OsY=
google.golang.org/genproto v0.0.0-20220518221133-4f43b3371335/go.mod h1:RAyBrSAP7Fh3Nc84ghnVLDPuV51xc9agzmm4Ph6i0Q4=
google.golang.org/grpc v1.33.2 h1:EQyQC3sa8M+p6Ulc8yy9SWSS2GVwyRc83gAbG8lrl4o=
google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.1.0/go.mod h1:6Kw0yEErY5E/yWrBtf03jp27GLLJujG4z/JK95pnjjw=

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@ -24,6 +24,12 @@ message Params {
(gogoproto.moretags) = "yaml:\"chain_config\"",
(gogoproto.nullable) = false
];
// min gas denominator bounds the minimum gasUsed to be charged
// to senders based on GasLimit
string min_gas_multiplier = 6 [
(gogoproto.customtype) = "github.com/cosmos/cosmos-sdk/types.Dec",
(gogoproto.nullable) = false
];
}
// ChainConfig defines the Ethereum ChainConfig parameters using *sdk.Int values

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@ -837,3 +837,58 @@ func (s *IntegrationTestSuite) TestBatchETHTransactions() {
s.Require().Equal(accountNonce+uint64(i)+1, tx.Nonce())
}
}
func (s *IntegrationTestSuite) TestGasConsumptionOnNormalTransfer() {
testCases := []struct {
name string
gasLimit uint64
expectedGasUsed uint64
}{
{
"gas used is the same as gas limit",
21000,
21000,
},
{
"gas used is half of Gas limit",
70000,
35000,
},
{
"gas used is less than half of gasLimit",
30000,
21000,
},
}
recipient := common.HexToAddress("0x378c50D9264C63F3F92B806d4ee56E9D86FfB3Ec")
chainID, err := s.network.Validators[0].JSONRPCClient.ChainID(s.ctx)
s.Require().NoError(err)
from := common.BytesToAddress(s.network.Validators[0].Address)
for _, tc := range testCases {
s.Run(tc.name, func() {
nonce := s.getAccountNonce(from)
s.Require().NoError(err)
gasPrice := s.getGasPrice()
msgTx := evmtypes.NewTx(
chainID,
nonce,
&recipient,
nil,
tc.gasLimit,
gasPrice,
nil, nil,
nil,
nil,
)
msgTx.From = from.Hex()
err = msgTx.Sign(s.ethSigner, s.network.Validators[0].ClientCtx.Keyring)
s.Require().NoError(err)
err := s.network.Validators[0].JSONRPCClient.SendTransaction(s.ctx, msgTx.AsTransaction())
s.Require().NoError(err)
s.waitForTransaction()
receipt := s.expectSuccessReceipt(msgTx.AsTransaction().Hash())
s.Equal(receipt.GasUsed, tc.expectedGasUsed)
})
}
}

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@ -1,5 +1,10 @@
package keeper
import (
sdk "github.com/cosmos/cosmos-sdk/types"
v2 "github.com/tharsis/ethermint/x/evm/migrations/v2"
)
// Migrator is a struct for handling in-place store migrations.
type Migrator struct {
keeper Keeper
@ -11,3 +16,8 @@ func NewMigrator(keeper Keeper) Migrator {
keeper: keeper,
}
}
// Migrate1to2 migrates the store from consensus version v1 to v2
func (m Migrator) Migrate1to2(ctx sdk.Context) error {
return v2.AddMinGasMultiplierParam(ctx, &m.keeper.paramSpace)
}

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@ -398,12 +398,12 @@ func (k *Keeper) ApplyMessageWithConfig(ctx sdk.Context, msg core.Message, trace
if msg.Gas() < leftoverGas {
return nil, sdkerrors.Wrap(types.ErrGasOverflow, "apply message")
}
gasUsed := msg.Gas() - leftoverGas
refund := GasToRefund(stateDB.GetRefund(), gasUsed, refundQuotient)
if refund > gasUsed {
temporaryGasUsed := msg.Gas() - leftoverGas
refund := GasToRefund(stateDB.GetRefund(), temporaryGasUsed, refundQuotient)
if refund > temporaryGasUsed {
return nil, sdkerrors.Wrap(types.ErrGasOverflow, "apply message")
}
gasUsed -= refund
temporaryGasUsed -= refund
// EVM execution error needs to be available for the JSON-RPC client
var vmError string
@ -418,6 +418,14 @@ func (k *Keeper) ApplyMessageWithConfig(ctx sdk.Context, msg core.Message, trace
}
}
// calculate a minimum amount of gas to be charged to sender if GasLimit
// is considerably higher than GasUsed to stay more aligned with Tendermint gas mechanics
// for more info https://github.com/tharsis/ethermint/issues/1085
// NOTE: MinGasDenominator can not be negative as it is validated on ValidateParams
gasLimit := sdk.NewDec(int64(msg.Gas()))
minimumGasUsed := gasLimit.Mul(cfg.Params.MinGasMultiplier)
gasUsed := sdk.MaxDec(minimumGasUsed, sdk.NewDec(int64(temporaryGasUsed))).TruncateInt().Uint64()
return &types.MsgEthereumTxResponse{
GasUsed: gasUsed,
VmError: vmError,

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@ -0,0 +1,18 @@
package v2
import (
sdk "github.com/cosmos/cosmos-sdk/types"
paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
"github.com/tharsis/ethermint/x/evm/types"
)
// AddMinGasMultiplierParam updates the module parameter MinGasMultiplier to 0.5
func AddMinGasMultiplierParam(ctx sdk.Context, paramStore *paramtypes.Subspace) error {
if !paramStore.HasKeyTable() {
ps := paramStore.WithKeyTable(types.ParamKeyTable())
paramStore = &ps
}
paramStore.Set(ctx, types.ParamStoreKeyMinGasMultiplier, types.DefaultMinGasMultiplier)
return nil
}

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@ -0,0 +1,46 @@
package v2_test
import (
"fmt"
"github.com/cosmos/cosmos-sdk/testutil"
sdk "github.com/cosmos/cosmos-sdk/types"
paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
"github.com/stretchr/testify/require"
"github.com/tharsis/ethermint/app"
"github.com/tharsis/ethermint/encoding"
v2 "github.com/tharsis/ethermint/x/evm/migrations/v2"
"github.com/tharsis/ethermint/x/evm/types"
"testing"
)
func TestAddMinGasMultiplierParam(t *testing.T) {
encCfg := encoding.MakeConfig(app.ModuleBasics)
erc20Key := sdk.NewKVStoreKey(types.StoreKey)
tErc20Key := sdk.NewTransientStoreKey(fmt.Sprintf("%s_test", types.StoreKey))
ctx := testutil.DefaultContext(erc20Key, tErc20Key)
paramStore := paramtypes.NewSubspace(
encCfg.Marshaler, encCfg.Amino, erc20Key, tErc20Key, "erc20",
)
paramStore = paramStore.WithKeyTable(types.ParamKeyTable())
require.True(t, paramStore.HasKeyTable())
// check no param
require.False(t, paramStore.Has(ctx, types.ParamStoreKeyMinGasMultiplier))
// Run migrations
err := v2.AddMinGasMultiplierParam(ctx, &paramStore)
require.NoError(t, err)
// Make sure the params are set
require.True(t, paramStore.Has(ctx, types.ParamStoreKeyMinGasMultiplier))
var minGasMultiplier sdk.Dec
// Make sure the new params are set
require.NotPanics(t, func() {
paramStore.Get(ctx, types.ParamStoreKeyMinGasMultiplier, &minGasMultiplier)
})
// check the params is up
require.Equal(t, minGasMultiplier, types.DefaultMinGasMultiplier)
}

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@ -44,7 +44,7 @@ func (AppModuleBasic) RegisterLegacyAminoCodec(_ *codec.LegacyAmino) {
// ConsensusVersion returns the consensus state-breaking version for the module.
func (AppModuleBasic) ConsensusVersion() uint64 {
return 1
return 2
}
// DefaultGenesis returns default genesis state as raw bytes for the evm
@ -117,13 +117,17 @@ func (AppModule) Name() string {
func (am AppModule) RegisterInvariants(ir sdk.InvariantRegistry) {
}
// RegisterQueryService registers a GRPC query service to respond to the
// module-specific GRPC queries.
// RegisterServices registers a GRPC query service to respond to the
// module-specific GRPC queries and runs necessary migrations.
func (am AppModule) RegisterServices(cfg module.Configurator) {
types.RegisterMsgServer(cfg.MsgServer(), am.keeper)
types.RegisterQueryServer(cfg.QueryServer(), am.keeper)
_ = keeper.NewMigrator(*am.keeper)
migrator := keeper.NewMigrator(*am.keeper)
// register v1 -> v2 migration for MinGasMultiplierParam
if err := cfg.RegisterMigration(types.ModuleName, 1, migrator.Migrate1to2); err != nil {
panic(fmt.Errorf("failed to migrate %s to v2: %w", types.ModuleName, err))
}
}
// Route returns the message routing key for the evm module.

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@ -48,7 +48,7 @@ func RandomizedGenState(simState *module.SimulationState) {
func(r *rand.Rand) { extraEIPs = GenExtraEIPs(r) },
)
params := types.NewParams(types.DefaultEVMDenom, true, true, types.DefaultChainConfig(), extraEIPs...)
params := types.NewParams(types.DefaultEVMDenom, true, true, types.DefaultChainConfig(), types.DefaultMinGasMultiplier, extraEIPs...)
evmGenesis := types.NewGenesisState(params, []types.GenesisAccount{})
bz, err := json.MarshalIndent(evmGenesis, "", " ")

239
x/evm/types/evm.pb.go generated
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@ -37,6 +37,9 @@ type Params struct {
ExtraEIPs []int64 `protobuf:"varint,4,rep,packed,name=extra_eips,json=extraEips,proto3" json:"extra_eips,omitempty" yaml:"extra_eips"`
// chain config defines the EVM chain configuration parameters
ChainConfig ChainConfig `protobuf:"bytes,5,opt,name=chain_config,json=chainConfig,proto3" json:"chain_config" yaml:"chain_config"`
// min gas denominator bounds the minimum gasUsed to be charged
// to senders based on GasLimit
MinGasMultiplier github_com_cosmos_cosmos_sdk_types.Dec `protobuf:"bytes,6,opt,name=min_gas_multiplier,json=minGasMultiplier,proto3,customtype=github.com/cosmos/cosmos-sdk/types.Dec" json:"min_gas_multiplier"`
}
func (m *Params) Reset() { *m = Params{} }
@ -657,100 +660,102 @@ func init() {
func init() { proto.RegisterFile("ethermint/evm/v1/evm.proto", fileDescriptor_d21ecc92c8c8583e) }
var fileDescriptor_d21ecc92c8c8583e = []byte{
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0xff, 0xff, 0xc9, 0xc5, 0x98, 0x42, 0x9e, 0x0e, 0x00, 0x00,
}
func (m *Params) Marshal() (dAtA []byte, err error) {
@ -773,6 +778,16 @@ func (m *Params) MarshalToSizedBuffer(dAtA []byte) (int, error) {
_ = i
var l int
_ = l
{
size := m.MinGasMultiplier.Size()
i -= size
if _, err := m.MinGasMultiplier.MarshalTo(dAtA[i:]); err != nil {
return 0, err
}
i = encodeVarintEvm(dAtA, i, uint64(size))
}
i--
dAtA[i] = 0x32
{
size, err := m.ChainConfig.MarshalToSizedBuffer(dAtA[:i])
if err != nil {
@ -1465,6 +1480,8 @@ func (m *Params) Size() (n int) {
}
l = m.ChainConfig.Size()
n += 1 + l + sovEvm(uint64(l))
l = m.MinGasMultiplier.Size()
n += 1 + l + sovEvm(uint64(l))
return n
}
@ -1925,6 +1942,40 @@ func (m *Params) Unmarshal(dAtA []byte) error {
return err
}
iNdEx = postIndex
case 6:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field MinGasMultiplier", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowEvm
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLen |= uint64(b&0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthEvm
}
postIndex := iNdEx + intStringLen
if postIndex < 0 {
return ErrInvalidLengthEvm
}
if postIndex > l {
return io.ErrUnexpectedEOF
}
if err := m.MinGasMultiplier.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
return err
}
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipEvm(dAtA[iNdEx:])

View File

@ -18,6 +18,9 @@ const (
DefaultEVMDenom = types.AttoPhoton
)
// DefaultMinGasMultiplier is 0.5 or 50%
var DefaultMinGasMultiplier = sdk.NewDecWithPrec(50, 2)
// Parameter keys
var (
ParamStoreKeyEVMDenom = []byte("EVMDenom")
@ -25,6 +28,7 @@ var (
ParamStoreKeyEnableCall = []byte("EnableCall")
ParamStoreKeyExtraEIPs = []byte("EnableExtraEIPs")
ParamStoreKeyChainConfig = []byte("ChainConfig")
ParamStoreKeyMinGasMultiplier = []byte("MinGasMultiplier")
// AvailableExtraEIPs define the list of all EIPs that can be enabled by the
// EVM interpreter. These EIPs are applied in order and can override the
@ -40,13 +44,14 @@ func ParamKeyTable() paramtypes.KeyTable {
}
// NewParams creates a new Params instance
func NewParams(evmDenom string, enableCreate, enableCall bool, config ChainConfig, extraEIPs ...int64) Params {
func NewParams(evmDenom string, enableCreate, enableCall bool, config ChainConfig, minGasMultiplier sdk.Dec, extraEIPs ...int64) Params {
return Params{
EvmDenom: evmDenom,
EnableCreate: enableCreate,
EnableCall: enableCall,
ExtraEIPs: extraEIPs,
ChainConfig: config,
MinGasMultiplier: minGasMultiplier,
}
}
@ -59,6 +64,7 @@ func DefaultParams() Params {
EnableCall: true,
ChainConfig: DefaultChainConfig(),
ExtraEIPs: nil,
MinGasMultiplier: DefaultMinGasMultiplier,
}
}
@ -70,6 +76,7 @@ func (p *Params) ParamSetPairs() paramtypes.ParamSetPairs {
paramtypes.NewParamSetPair(ParamStoreKeyEnableCall, &p.EnableCall, validateBool),
paramtypes.NewParamSetPair(ParamStoreKeyExtraEIPs, &p.ExtraEIPs, validateEIPs),
paramtypes.NewParamSetPair(ParamStoreKeyChainConfig, &p.ChainConfig, validateChainConfig),
paramtypes.NewParamSetPair(ParamStoreKeyMinGasMultiplier, &p.MinGasMultiplier, validateMinGasMultiplier),
}
}
@ -83,6 +90,10 @@ func (p Params) Validate() error {
return err
}
if err := validateMinGasMultiplier(p.MinGasMultiplier); err != nil {
return err
}
return p.ChainConfig.Validate()
}
@ -127,6 +138,27 @@ func validateEIPs(i interface{}) error {
return nil
}
func validateMinGasMultiplier(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.IsNil() {
return fmt.Errorf("invalid parameter: nil")
}
if v.IsNegative() {
return fmt.Errorf("value cannot be negative: %T", i)
}
if v.GT(sdk.OneDec()) {
return fmt.Errorf("value cannot be greater than 1: %T", i)
}
return nil
}
func validateChainConfig(i interface{}) error {
cfg, ok := i.(ChainConfig)
if !ok {

View File

@ -1,6 +1,7 @@
package types
import (
sdk "github.com/cosmos/cosmos-sdk/types"
"testing"
"github.com/ethereum/go-ethereum/params"
@ -22,7 +23,7 @@ func TestParamsValidate(t *testing.T) {
{"default", DefaultParams(), false},
{
"valid",
NewParams("ara", true, true, DefaultChainConfig(), 2929, 1884, 1344),
NewParams("ara", true, true, DefaultChainConfig(), DefaultMinGasMultiplier, 2929, 1884, 1344),
false,
},
{
@ -46,9 +47,9 @@ func TestParamsValidate(t *testing.T) {
true,
},
{
"invalid chain config",
NewParams("ara", true, true, ChainConfig{}, 2929, 1884, 1344),
false,
"invalid min gas multplier",
NewParams("ara", true, true, DefaultChainConfig(), sdk.NewDec(2), 2929, 1884, 1344),
true,
},
}
@ -64,7 +65,7 @@ func TestParamsValidate(t *testing.T) {
}
func TestParamsEIPs(t *testing.T) {
params := NewParams("ara", true, true, DefaultChainConfig(), 2929, 1884, 1344)
params := NewParams("ara", true, true, DefaultChainConfig(), DefaultMinGasMultiplier, 2929, 1884, 1344)
actual := params.EIPs()
require.Equal(t, []int([]int{2929, 1884, 1344}), actual)
@ -77,6 +78,7 @@ func TestParamsValidatePriv(t *testing.T) {
require.NoError(t, validateBool(true))
require.Error(t, validateEIPs(""))
require.NoError(t, validateEIPs([]int64{1884}))
require.Error(t, validateMinGasMultiplier(sdk.NewDec(-5)))
}
func TestValidateChainConfig(t *testing.T) {