package les
import (
"math/rand"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth/downloader"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie"
)
func expectResponse(r p2p.MsgReader, msgcode, reqID, bv uint64, data interface{}) error {
type resp struct {
ReqID, BV uint64
Data interface{}
}
return p2p.ExpectMsg(r, msgcode, resp{reqID, bv, data})
}
// Tests that block headers can be retrieved from a remote chain based on user queries.
func TestGetBlockHeadersLes1(t *testing.T) { testGetBlockHeaders(t, 1) }
func testGetBlockHeaders(t *testing.T, protocol int) {
pm, _, _ := newTestProtocolManagerMust(t, false, downloader.MaxHashFetch+15, nil)
bc := pm.blockchain.(*core.BlockChain)
peer, _ := newTestPeer(t, "peer", protocol, pm, true)
defer peer.close()
// Create a "random" unknown hash for testing
var unknown common.Hash
for i, _ := range unknown {
unknown[i] = byte(i)
}
// Create a batch of tests for various scenarios
limit := uint64(MaxHeaderFetch)
tests := []struct {
query *getBlockHeadersData // The query to execute for header retrieval
expect []common.Hash // The hashes of the block whose headers are expected
}{
// A single random block should be retrievable by hash and number too
{
&getBlockHeadersData{Origin: hashOrNumber{Hash: bc.GetBlockByNumber(limit / 2).Hash()}, Amount: 1},
[]common.Hash{bc.GetBlockByNumber(limit / 2).Hash()},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 1},
[]common.Hash{bc.GetBlockByNumber(limit / 2).Hash()},
},
// Multiple headers should be retrievable in both directions
{
&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 3},
[]common.Hash{
bc.GetBlockByNumber(limit / 2).Hash(),
bc.GetBlockByNumber(limit/2 + 1).Hash(),
bc.GetBlockByNumber(limit/2 + 2).Hash(),
},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 3, Reverse: true},
[]common.Hash{
bc.GetBlockByNumber(limit / 2).Hash(),
bc.GetBlockByNumber(limit/2 - 1).Hash(),
bc.GetBlockByNumber(limit/2 - 2).Hash(),
},
},
// Multiple headers with skip lists should be retrievable
{
&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Skip: 3, Amount: 3},
[]common.Hash{
bc.GetBlockByNumber(limit / 2).Hash(),
bc.GetBlockByNumber(limit/2 + 4).Hash(),
bc.GetBlockByNumber(limit/2 + 8).Hash(),
},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Skip: 3, Amount: 3, Reverse: true},
[]common.Hash{
bc.GetBlockByNumber(limit / 2).Hash(),
bc.GetBlockByNumber(limit/2 - 4).Hash(),
bc.GetBlockByNumber(limit/2 - 8).Hash(),
},
},
// The chain endpoints should be retrievable
{
&getBlockHeadersData{Origin: hashOrNumber{Number: 0}, Amount: 1},
[]common.Hash{bc.GetBlockByNumber(0).Hash()},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().NumberU64()}, Amount: 1},
[]common.Hash{bc.CurrentBlock().Hash()},
},
// Ensure protocol limits are honored
/*{
&getBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().NumberU64() - 1}, Amount: limit + 10, Reverse: true},
bc.GetBlockHashesFromHash(bc.CurrentBlock().Hash(), limit),
},*/
// Check that requesting more than available is handled gracefully
{
&getBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().NumberU64() - 4}, Skip: 3, Amount: 3},
[]common.Hash{
bc.GetBlockByNumber(bc.CurrentBlock().NumberU64() - 4).Hash(),
bc.GetBlockByNumber(bc.CurrentBlock().NumberU64()).Hash(),
},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 3, Amount: 3, Reverse: true},
[]common.Hash{
bc.GetBlockByNumber(4).Hash(),
bc.GetBlockByNumber(0).Hash(),
},
},
// Check that requesting more than available is handled gracefully, even if mid skip
{
&getBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().NumberU64() - 4}, Skip: 2, Amount: 3},
[]common.Hash{
bc.GetBlockByNumber(bc.CurrentBlock().NumberU64() - 4).Hash(),
bc.GetBlockByNumber(bc.CurrentBlock().NumberU64() - 1).Hash(),
},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 2, Amount: 3, Reverse: true},
[]common.Hash{
bc.GetBlockByNumber(4).Hash(),
bc.GetBlockByNumber(1).Hash(),
},
},
// Check that non existing headers aren't returned
{
&getBlockHeadersData{Origin: hashOrNumber{Hash: unknown}, Amount: 1},
[]common.Hash{},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().NumberU64() + 1}, Amount: 1},
[]common.Hash{},
},
}
// Run each of the tests and verify the results against the chain
var reqID uint64
for i, tt := range tests {
// Collect the headers to expect in the response
headers := []*types.Header{}
for _, hash := range tt.expect {
headers = append(headers, bc.GetHeaderByHash(hash))
}
// Send the hash request and verify the response
reqID++
cost := peer.GetRequestCost(GetBlockHeadersMsg, int(tt.query.Amount))
sendRequest(peer.app, GetBlockHeadersMsg, reqID, cost, tt.query)
if err := expectResponse(peer.app, BlockHeadersMsg, reqID, testBufLimit, headers); err != nil {
t.Errorf("test %d: headers mismatch: %v", i, err)
}
}
}
// Tests that block contents can be retrieved from a remote chain based on their hashes.
func TestGetBlockBodiesLes1(t *testing.T) { testGetBlockBodies(t, 1) }
func testGetBlockBodies(t *testing.T, protocol int) {
pm, _, _ := newTestProtocolManagerMust(t, false, downloader.MaxBlockFetch+15, nil)
bc := pm.blockchain.(*core.BlockChain)
peer, _ := newTestPeer(t, "peer", protocol, pm, true)
defer peer.close()
// Create a batch of tests for various scenarios
limit := MaxBodyFetch
tests := []struct {
random int // Number of blocks to fetch randomly from the chain
explicit []common.Hash // Explicitly requested blocks
available []bool // Availability of explicitly requested blocks
expected int // Total number of existing blocks to expect
}{
{1, nil, nil, 1}, // A single random block should be retrievable
{10, nil, nil, 10}, // Multiple random blocks should be retrievable
{limit, nil, nil, limit}, // The maximum possible blocks should be retrievable
//{limit + 1, nil, nil, limit}, // No more than the possible block count should be returned
{0, []common.Hash{bc.Genesis().Hash()}, []bool{true}, 1}, // The genesis block should be retrievable
{0, []common.Hash{bc.CurrentBlock().Hash()}, []bool{true}, 1}, // The chains head block should be retrievable
{0, []common.Hash{common.Hash{}}, []bool{false}, 0}, // A non existent block should not be returned
// Existing and non-existing blocks interleaved should not cause problems
{0, []common.Hash{
common.Hash{},
bc.GetBlockByNumber(1).Hash(),
common.Hash{},
bc.GetBlockByNumber(10).Hash(),
common.Hash{},
bc.GetBlockByNumber(100).Hash(),
common.Hash{},
}, []bool{false, true, false, true, false, true, false}, 3},
}
// Run each of the tests and verify the results against the chain
var reqID uint64
for i, tt := range tests {
// Collect the hashes to request, and the response to expect
hashes, seen := []common.Hash{}, make(map[int64]bool)
bodies := []*types.Body{}
for j := 0; j < tt.random; j++ {
for {
num := rand.Int63n(int64(bc.CurrentBlock().NumberU64()))
if !seen[num] {
seen[num] = true
block := bc.GetBlockByNumber(uint64(num))
hashes = append(hashes, block.Hash())
if len(bodies) < tt.expected {
bodies = append(bodies, &types.Body{Transactions: block.Transactions(), Uncles: block.Uncles()})
}
break
}
}
}
for j, hash := range tt.explicit {
hashes = append(hashes, hash)
if tt.available[j] && len(bodies) < tt.expected {
block := bc.GetBlockByHash(hash)
bodies = append(bodies, &types.Body{Transactions: block.Transactions(), Uncles: block.Uncles()})
}
}
reqID++
// Send the hash request and verify the response
cost := peer.GetRequestCost(GetBlockBodiesMsg, len(hashes))
sendRequest(peer.app, GetBlockBodiesMsg, reqID, cost, hashes)
if err := expectResponse(peer.app, BlockBodiesMsg, reqID, testBufLimit, bodies); err != nil {
t.Errorf("test %d: bodies mismatch: %v", i, err)
}
}
}
// Tests that the contract codes can be retrieved based on account addresses.
func TestGetCodeLes1(t *testing.T) { testGetCode(t, 1) }
func testGetCode(t *testing.T, protocol int) {
// Assemble the test environment
pm, _, _ := newTestProtocolManagerMust(t, false, 4, testChainGen)
bc := pm.blockchain.(*core.BlockChain)
peer, _ := newTestPeer(t, "peer", protocol, pm, true)
defer peer.close()
var codereqs []*CodeReq
var codes [][]byte
for i := uint64(0); i <= bc.CurrentBlock().NumberU64(); i++ {
header := bc.GetHeaderByNumber(i)
req := &CodeReq{
BHash: header.Hash(),
AccKey: crypto.Keccak256(testContractAddr[:]),
}
codereqs = append(codereqs, req)
if i >= testContractDeployed {
codes = append(codes, testContractCodeDeployed)
}
}
cost := peer.GetRequestCost(GetCodeMsg, len(codereqs))
sendRequest(peer.app, GetCodeMsg, 42, cost, codereqs)
if err := expectResponse(peer.app, CodeMsg, 42, testBufLimit, codes); err != nil {
t.Errorf("codes mismatch: %v", err)
}
}
// Tests that the transaction receipts can be retrieved based on hashes.
func TestGetReceiptLes1(t *testing.T) { testGetReceipt(t, 1) }
func testGetReceipt(t *testing.T, protocol int) {
// Assemble the test environment
pm, db, _ := newTestProtocolManagerMust(t, false, 4, testChainGen)
bc := pm.blockchain.(*core.BlockChain)
peer, _ := newTestPeer(t, "peer", protocol, pm, true)
defer peer.close()
// Collect the hashes to request, and the response to expect
hashes, receipts := []common.Hash{}, []types.Receipts{}
for i := uint64(0); i <= bc.CurrentBlock().NumberU64(); i++ {
block := bc.GetBlockByNumber(i)
hashes = append(hashes, block.Hash())
receipts = append(receipts, core.GetBlockReceipts(db, block.Hash(), block.NumberU64()))
}
// Send the hash request and verify the response
cost := peer.GetRequestCost(GetReceiptsMsg, len(hashes))
sendRequest(peer.app, GetReceiptsMsg, 42, cost, hashes)
if err := expectResponse(peer.app, ReceiptsMsg, 42, testBufLimit, receipts); err != nil {
t.Errorf("receipts mismatch: %v", err)
}
}
// Tests that trie merkle proofs can be retrieved
func TestGetProofsLes1(t *testing.T) { testGetReceipt(t, 1) }
func testGetProofs(t *testing.T, protocol int) {
// Assemble the test environment
pm, db, _ := newTestProtocolManagerMust(t, false, 4, testChainGen)
bc := pm.blockchain.(*core.BlockChain)
peer, _ := newTestPeer(t, "peer", protocol, pm, true)
defer peer.close()
var proofreqs []ProofReq
var proofs [][]rlp.RawValue
accounts := []common.Address{testBankAddress, acc1Addr, acc2Addr, common.Address{}}
for i := uint64(0); i <= bc.CurrentBlock().NumberU64(); i++ {
header := bc.GetHeaderByNumber(i)
root := header.Root
trie, _ := trie.New(root, db)
for _, acc := range accounts {
req := ProofReq{
BHash: header.Hash(),
Key: acc[:],
}
proofreqs = append(proofreqs, req)
proof := trie.Prove(crypto.Keccak256(acc[:]))
proofs = append(proofs, proof)
}
}
// Send the proof request and verify the response
cost := peer.GetRequestCost(GetProofsMsg, len(proofreqs))
sendRequest(peer.app, GetProofsMsg, 42, cost, proofreqs)
if err := expectResponse(peer.app, ProofsMsg, 42, testBufLimit, proofs); err != nil {
t.Errorf("proofs mismatch: %v", err)
}
}
