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package test
import (
"encoding/binary"
"testing"
interopTypes "github.com/ethereum-optimism/optimism/op-program/client/interop/types"
"github.com/ethereum-optimism/optimism/op-service/eth"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/rawdb"
gethTypes "github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
)
// Same as l2.StateOracle but need to use our own copy to avoid dependency loops
type stateOracle interface {
NodeByHash(nodeHash common.Hash) []byte
CodeByHash(codeHash common.Hash) []byte
}
type StubBlockOracle struct {
t *testing.T
Blocks map[common.Hash]*gethTypes.Block
Outputs map[common.Hash]eth.Output
TransitionStates map[common.Hash]*interopTypes.TransitionState
stateOracle
}
func NewStubOracle(t *testing.T) (*StubBlockOracle, *StubStateOracle) {
stateOracle := NewStubStateOracle(t)
blockOracle := StubBlockOracle{
t: t,
Blocks: make(map[common.Hash]*gethTypes.Block),
Outputs: make(map[common.Hash]eth.Output),
TransitionStates: make(map[common.Hash]*interopTypes.TransitionState),
stateOracle: stateOracle,
}
return &blockOracle, stateOracle
}
func NewStubOracleWithBlocks(t *testing.T, chain []*gethTypes.Block, outputs []eth.Output, db ethdb.Database) *StubBlockOracle {
blocks := make(map[common.Hash]*gethTypes.Block, len(chain))
for _, block := range chain {
blocks[block.Hash()] = block
}
o := make(map[common.Hash]eth.Output, len(outputs))
for _, output := range outputs {
o[common.Hash(eth.OutputRoot(output))] = output
}
return &StubBlockOracle{
t: t,
Blocks: blocks,
Outputs: o,
stateOracle: &KvStateOracle{t: t, Source: db},
}
}
func (o StubBlockOracle) BlockByHash(blockHash common.Hash) *gethTypes.Block {
block, ok := o.Blocks[blockHash]
if !ok {
o.t.Fatalf("requested unknown block %s", blockHash)
}
return block
}
func (o StubBlockOracle) OutputByRoot(root common.Hash) eth.Output {
output, ok := o.Outputs[root]
if !ok {
o.t.Fatalf("requested unknown output root %s", root)
}
return output
}
func (o StubBlockOracle) TransitionStateByRoot(root common.Hash) *interopTypes.TransitionState {
output, ok := o.TransitionStates[root]
if !ok {
o.t.Fatalf("requested unknown transition state root %s", root)
}
return output
}
func (o StubBlockOracle) BlockDataByHash(agreedBlockHash, blockHash common.Hash, chainID uint64) *gethTypes.Block {
block, ok := o.Blocks[blockHash]
if !ok {
o.t.Fatalf("requested unknown block %s", blockHash)
}
return block
}
// KvStateOracle loads data from a source ethdb.KeyValueStore
type KvStateOracle struct {
t *testing.T
Source ethdb.KeyValueStore
}
func NewKvStateOracle(t *testing.T, db ethdb.KeyValueStore) *KvStateOracle {
return &KvStateOracle{
t: t,
Source: db,
}
}
func (o *KvStateOracle) NodeByHash(nodeHash common.Hash) []byte {
val, err := o.Source.Get(nodeHash.Bytes())
if err != nil {
o.t.Fatalf("error retrieving node %v: %v", nodeHash, err)
}
return val
}
func (o *KvStateOracle) CodeByHash(hash common.Hash) []byte {
return rawdb.ReadCode(o.Source, hash)
}
func NewStubStateOracle(t *testing.T) *StubStateOracle {
return &StubStateOracle{
t: t,
Data: make(map[common.Hash][]byte),
Code: make(map[common.Hash][]byte),
}
}
// StubStateOracle is a StateOracle implementation that reads from simple maps
type StubStateOracle struct {
t *testing.T
Data map[common.Hash][]byte
Code map[common.Hash][]byte
}
func (o *StubStateOracle) NodeByHash(nodeHash common.Hash) []byte {
data, ok := o.Data[nodeHash]
if !ok {
o.t.Fatalf("no value for node %v", nodeHash)
}
return data
}
func (o *StubStateOracle) CodeByHash(hash common.Hash) []byte {
data, ok := o.Code[hash]
if !ok {
o.t.Fatalf("no value for code %v", hash)
}
return data
}
type StubPrecompileOracle struct {
t *testing.T
Results map[common.Hash]PrecompileResult
Calls int
}
func NewStubPrecompileOracle(t *testing.T) *StubPrecompileOracle {
return &StubPrecompileOracle{t: t, Results: make(map[common.Hash]PrecompileResult)}
}
type PrecompileResult struct {
Result []byte
Ok bool
}
func (o *StubPrecompileOracle) Precompile(address common.Address, input []byte, requiredGas uint64) ([]byte, bool) {
arg := append(address.Bytes(), binary.BigEndian.AppendUint64(nil, requiredGas)...)
arg = append(arg, input...)
result, ok := o.Results[crypto.Keccak256Hash(arg)]
if !ok {
o.t.Fatalf("no value for point evaluation %x required gas %v", input, requiredGas)
}
o.Calls++
return result.Result, result.Ok
}