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package l1
import (
"encoding/binary"
"math/rand"
"testing"
"github.com/ethereum-optimism/optimism/op-program/client/l1/test"
"github.com/ethereum-optimism/optimism/op-service/eth"
"github.com/ethereum-optimism/optimism/op-service/testutils"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/stretchr/testify/require"
)
// Should implement Oracle
var _ Oracle = (*CachingOracle)(nil)
func TestCachingOracle_HeaderByBlockHash(t *testing.T) {
rng := rand.New(rand.NewSource(1))
stub := test.NewStubOracle(t)
oracle := NewCachingOracle(stub)
block := testutils.RandomBlockInfo(rng)
// Initial call retrieves from the stub
stub.Blocks[block.Hash()] = block
result := oracle.HeaderByBlockHash(block.Hash())
require.Equal(t, block, result)
// Later calls should retrieve from cache
delete(stub.Blocks, block.Hash())
result = oracle.HeaderByBlockHash(block.Hash())
require.Equal(t, block, result)
}
func TestCachingOracle_TransactionsByBlockHash(t *testing.T) {
rng := rand.New(rand.NewSource(1))
stub := test.NewStubOracle(t)
oracle := NewCachingOracle(stub)
block, _ := testutils.RandomBlock(rng, 3)
// Initial call retrieves from the stub
stub.Blocks[block.Hash()] = eth.BlockToInfo(block)
stub.Txs[block.Hash()] = block.Transactions()
actualBlock, actualTxs := oracle.TransactionsByBlockHash(block.Hash())
require.Equal(t, eth.BlockToInfo(block), actualBlock)
require.Equal(t, block.Transactions(), actualTxs)
// Later calls should retrieve from cache
delete(stub.Blocks, block.Hash())
delete(stub.Txs, block.Hash())
actualBlock, actualTxs = oracle.TransactionsByBlockHash(block.Hash())
require.Equal(t, eth.BlockToInfo(block), actualBlock)
require.Equal(t, block.Transactions(), actualTxs)
}
func TestCachingOracle_ReceiptsByBlockHash(t *testing.T) {
rng := rand.New(rand.NewSource(1))
stub := test.NewStubOracle(t)
oracle := NewCachingOracle(stub)
block, rcpts := testutils.RandomBlock(rng, 3)
// Initial call retrieves from the stub
stub.Blocks[block.Hash()] = eth.BlockToInfo(block)
stub.Rcpts[block.Hash()] = rcpts
actualBlock, actualRcpts := oracle.ReceiptsByBlockHash(block.Hash())
require.Equal(t, eth.BlockToInfo(block), actualBlock)
require.EqualValues(t, rcpts, actualRcpts)
// Later calls should retrieve from cache
delete(stub.Blocks, block.Hash())
delete(stub.Rcpts, block.Hash())
actualBlock, actualRcpts = oracle.ReceiptsByBlockHash(block.Hash())
require.Equal(t, eth.BlockToInfo(block), actualBlock)
require.EqualValues(t, rcpts, actualRcpts)
}
func TestCachingOracle_GetBlobs(t *testing.T) {
stub := test.NewStubOracle(t)
oracle := NewCachingOracle(stub)
l1BlockRef := eth.L1BlockRef{Time: 0}
indexedBlobHash := eth.IndexedBlobHash{Hash: [32]byte{0xFA, 0xCA, 0xDE}, Index: 0}
blob := eth.Blob{0xFF}
// Initial call retrieves from the stub
stub.Blobs[l1BlockRef] = make(map[eth.IndexedBlobHash]*eth.Blob)
stub.Blobs[l1BlockRef][indexedBlobHash] = &blob
actualBlob := oracle.GetBlob(l1BlockRef, indexedBlobHash)
require.Equal(t, &blob, actualBlob)
// Later calls should retrieve from cache
delete(stub.Blobs[l1BlockRef], indexedBlobHash)
actualBlob = oracle.GetBlob(l1BlockRef, indexedBlobHash)
require.Equal(t, &blob, actualBlob)
}
func TestCachingOracle_Precompile(t *testing.T) {
stub := test.NewStubOracle(t)
oracle := NewCachingOracle(stub)
input := []byte{0x01, 0x02, 0x03, 0x04}
requiredGas := uint64(100)
output := []byte{0x0a, 0x0b, 0x0c, 0x0d}
addr := common.Address{0x1}
key := crypto.Keccak256Hash(append(append(addr.Bytes(), binary.BigEndian.AppendUint64(nil, requiredGas)...), input...))
// Initial call retrieves from the stub
stub.PcmpResults[key] = output
actualResult, actualStatus := oracle.Precompile(addr, input, requiredGas)
require.True(t, actualStatus)
require.EqualValues(t, output, actualResult)
// Later calls should retrieve from cache
delete(stub.PcmpResults, key)
actualResult, actualStatus = oracle.Precompile(addr, input, requiredGas)
require.True(t, actualStatus)
require.EqualValues(t, output, actualResult)
}