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package batching
import (
"math/big"
"testing"
"github.com/ethereum-optimism/optimism/op-service/sources/batching/test"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/stretchr/testify/require"
)
func TestDecodeCall(t *testing.T) {
method := "approve"
spender := common.Address{0xbb, 0xee}
amount := big.NewInt(4242)
testAbi, err := test.ERC20MetaData.GetAbi()
require.NoError(t, err)
validData, err := testAbi.Pack(method, spender, amount)
require.NoError(t, err)
contract := NewBoundContract(testAbi, common.Address{0xaa})
t.Run("TooShort", func(t *testing.T) {
_, _, err := contract.DecodeCall([]byte{1, 2, 3})
require.ErrorIs(t, err, ErrUnknownMethod)
})
t.Run("UnknownMethodId", func(t *testing.T) {
_, _, err := contract.DecodeCall([]byte{1, 2, 3, 4})
require.ErrorIs(t, err, ErrUnknownMethod)
})
t.Run("MissingArgs", func(t *testing.T) {
// Truncate to just the 4 byte method selector
_, _, err = contract.DecodeCall(validData[:4])
require.ErrorIs(t, err, ErrInvalidCall)
// Truncate to partial args
_, _, err = contract.DecodeCall(validData[:6])
require.ErrorIs(t, err, ErrInvalidCall)
// Truncate to first arg but missing second
_, _, err = contract.DecodeCall(validData[:24])
require.ErrorIs(t, err, ErrInvalidCall)
})
t.Run("ValidCall", func(t *testing.T) {
name, args, err := contract.DecodeCall(validData)
require.NoError(t, err)
require.Equal(t, name, method)
require.Equal(t, spender, args.GetAddress(0))
require.Zero(t, amount.Cmp(args.GetBigInt(1)))
})
}
func TestDecodeEvent(t *testing.T) {
testAbi, err := test.ERC20MetaData.GetAbi()
require.NoError(t, err)
// event Transfer(address indexed from, address indexed to, uint256 amount);
event := testAbi.Events["Transfer"]
contract := NewBoundContract(testAbi, common.Address{0xaa})
t.Run("NoTopics", func(t *testing.T) {
log := &types.Log{}
_, _, err := contract.DecodeEvent(log)
require.ErrorIs(t, err, ErrUnknownEvent)
})
t.Run("UnknownEvent", func(t *testing.T) {
log := &types.Log{
Topics: []common.Hash{{0xaa}},
}
_, _, err := contract.DecodeEvent(log)
require.ErrorIs(t, err, ErrUnknownEvent)
})
t.Run("InvalidTopics", func(t *testing.T) {
amount := big.NewInt(828274)
data, err := event.Inputs.NonIndexed().Pack(amount)
require.NoError(t, err)
log := &types.Log{
Topics: []common.Hash{
event.ID,
common.BytesToHash(common.Address{0xaa}.Bytes()),
// Missing topic for to indexed value
},
Data: data,
}
_, _, err = contract.DecodeEvent(log)
require.ErrorIs(t, err, ErrInvalidEvent)
})
t.Run("MissingData", func(t *testing.T) {
log := &types.Log{
Topics: []common.Hash{
event.ID,
common.BytesToHash(common.Address{0xaa}.Bytes()),
common.BytesToHash(common.Address{0xbb}.Bytes()),
},
}
_, _, err := contract.DecodeEvent(log)
require.ErrorIs(t, err, ErrInvalidEvent)
})
t.Run("InvalidData", func(t *testing.T) {
log := &types.Log{
Topics: []common.Hash{
event.ID,
common.BytesToHash(common.Address{0xaa}.Bytes()),
common.BytesToHash(common.Address{0xbb}.Bytes()),
},
Data: []byte{0xbb, 0xcc},
}
_, _, err := contract.DecodeEvent(log)
require.ErrorIs(t, err, ErrInvalidEvent)
})
t.Run("ValidEvent", func(t *testing.T) {
amount := big.NewInt(828274)
data, err := event.Inputs.NonIndexed().Pack(amount)
require.NoError(t, err)
log := &types.Log{
Topics: []common.Hash{
event.ID,
common.BytesToHash(common.Address{0xaa}.Bytes()),
common.BytesToHash(common.Address{0xbb}.Bytes()),
},
Data: data,
}
name, result, err := contract.DecodeEvent(log)
require.NoError(t, err)
require.Equal(t, name, event.Name)
require.Equal(t, common.Address{0xaa}, result.GetAddress(0))
require.Equal(t, common.Address{0xbb}, result.GetAddress(1))
require.Zerof(t, amount.Cmp(result.GetBigInt(2)), "expected %v but got %v", amount, result.GetBigInt(2))
})
}