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Batch Amendment #5060

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@dangell7 dangell7 commented Jul 10, 2024

High Level Overview of Change

Context of Change

Type of Change

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to not work as expected)
  • Refactor (non-breaking change that only restructures code)
  • Performance (increase or change in throughput and/or latency)
  • Tests (you added tests for code that already exists, or your new feature included in this PR)
  • Documentation update
  • Chore (no impact to binary, e.g. .gitignore, formatting, dropping support for older tooling)
  • Release

API Impact

  • Public API: New feature (new methods and/or new fields)
  • Public API: Breaking change (in general, breaking changes should only impact the next api_version)
  • libxrpl change (any change that may affect libxrpl or dependents of libxrpl)
  • Peer protocol change (must be backward compatible or bump the peer protocol version)

Test Plan

https://gist.github.com/dangell7/3afbe8c4597a58dc2b02be598f9b7d54

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codecov bot commented Jul 10, 2024

Codecov Report

Attention: Patch coverage is 85.81236% with 62 lines in your changes missing coverage. Please review.

Project coverage is 78.0%. Comparing base (ccc0889) to head (accc8e0).

Files with missing lines Patch % Lines
src/xrpld/app/tx/detail/applySteps.cpp 40.0% 15 Missing ⚠️
src/xrpld/app/tx/detail/Batch.cpp 88.4% 14 Missing ⚠️
src/xrpld/app/tx/detail/Transactor.cpp 85.9% 9 Missing ⚠️
src/xrpld/overlay/detail/PeerImp.cpp 0.0% 8 Missing ⚠️
src/xrpld/app/misc/NetworkOPs.cpp 68.4% 6 Missing ⚠️
src/libxrpl/protocol/STTx.cpp 92.5% 5 Missing ⚠️
src/xrpld/app/ledger/detail/OpenLedger.cpp 33.3% 2 Missing ⚠️
src/xrpld/app/tx/detail/apply.cpp 96.8% 2 Missing ⚠️
src/xrpld/ledger/detail/OpenView.cpp 50.0% 1 Missing ⚠️
Additional details and impacted files

Impacted file tree graph

@@           Coverage Diff            @@
##           develop   #5060    +/-   ##
========================================
  Coverage     78.0%   78.0%            
========================================
  Files          789     792     +3     
  Lines        66954   67292   +338     
  Branches      8108    8139    +31     
========================================
+ Hits         52218   52503   +285     
- Misses       14736   14789    +53     
Files with missing lines Coverage Δ
include/xrpl/protocol/Batch.h 100.0% <100.0%> (ø)
include/xrpl/protocol/Feature.h 100.0% <ø> (ø)
include/xrpl/protocol/HashPrefix.h 100.0% <ø> (ø)
include/xrpl/protocol/STObject.h 92.9% <ø> (ø)
include/xrpl/protocol/STTx.h 100.0% <ø> (ø)
include/xrpl/protocol/TER.h 100.0% <100.0%> (ø)
include/xrpl/protocol/TxMeta.h 91.7% <ø> (ø)
include/xrpl/protocol/detail/transactions.macro 100.0% <100.0%> (ø)
src/libxrpl/protocol/InnerObjectFormats.cpp 100.0% <100.0%> (ø)
src/libxrpl/protocol/STObject.cpp 87.9% <100.0%> (+0.5%) ⬆️
... and 23 more

... and 6 files with indirect coverage changes

Impacted file tree graph

@ximinez
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ximinez commented Jul 31, 2024

Also, since it seems this PR is still under active development, could you convert it to a draft?

@dangell7 dangell7 marked this pull request as draft July 31, 2024 19:53

env(noop(bob), ter(tesSUCCESS));
auto const carol = Account("carol");
env.fund(XRP(220), alice, bob, carol);
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@shawnxie999 shawnxie999 Jan 10, 2025

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would prefer not hardcoding the values since they are subjected to change, and it's hard for the reviewer to know the exact numbers. Should use following variables for account funding:

            auto const acctReserve = env.current()->fees().accountReserve(0);
            auto const incReserve = env.current()->fees().increment;
            auto const fee = env.current()->fees().base;

           env.fund(acctReserve + ..., alice, bob, carol);

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(feel free to leave these test-related comments for later, since they are less urgent)

batch::sig(bob),
ter(telINSUF_FEE_P));
// Using 1 XRP to create insufficient reserve result
auto const batchFee = XRP(1);
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ditto. we should specify the batchFee relative to the fee variables, so it's easier to understand, something like

auto const acctReserve = env.current()->fees().accountReserve(0);
auto const incReserve = env.current()->fees().increment;
auto const fee = env.current()->fees().base;
	...
	...
	...
auto const batchFee = fee * 2; // Just making this up, should change the value accordingly

env(batch::batch(alice, seq, batchFee, tfOnlyOne),
batch::add(pay(alice, bob, XRP(999)), seq + 1),
batch::add(pay(alice, bob, XRP(1)), seq + 2),
batch::add(pay(alice, bob, XRP(1)), seq + 3),
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nit: doesn't change the test behavior, prefer to change the amount of the unprocessed txn to be different from the previous txn

Suggested change
batch::add(pay(alice, bob, XRP(1)), seq + 3),
batch::add(pay(alice, bob, XRP(2)), seq + 3),

Comment on lines +94 to +95
// BEAST_EXPECT(jrr[jss::meta][sfParentBatchID.jsonName] ==
// batchId);
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Why is this commented out?

jtx::Account account;
};

Json::Value
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Suggested change
Json::Value
std::optional<Json::Value>

BEAST_EXPECT(transactions.size() == batchResults.size() + 1);

// Validate ttBatch is correct index
auto const txn = getTxByIndex(jrr, 0);
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Is this assuming that Batch transactions are the only ones in the ledger?

Comment on lines +85 to +90
Json::Value jsonTx;
jsonTx[jss::binary] = false;
jsonTx[jss::transaction] = batchResult.txHash;
jsonTx[jss::id] = 1;
Json::Value const jrr =
env.rpc("json", "tx", to_string(jsonTx))[jss::result];
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@mvadari mvadari Jan 10, 2025

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Suggested change
Json::Value jsonTx;
jsonTx[jss::binary] = false;
jsonTx[jss::transaction] = batchResult.txHash;
jsonTx[jss::id] = 1;
Json::Value const jrr =
env.rpc("json", "tx", to_string(jsonTx))[jss::result];
Json::Value const jrr =
env.rpc("tx", batchResult.txHash)[jss::result];

std::uint32_t sequence,
std::optional<std::uint32_t> ticket = std::nullopt)
{
std::uint32_t const index = jv[jss::RawTransactions].size();
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Why doesn't this use batch in jtx/batch.h?

XRPAmount
calcBatchFee(
test::jtx::Env const& env,
uint32_t const& signers,
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nit:

Suggested change
uint32_t const& signers,
uint32_t const& numSigners,

Comment on lines +42 to +49
batch(
jtx::Account const& account,
uint32_t seq,
STAmount const& fee,
std::uint32_t flags);

/** Adds a new Batch Txn on a JTx. */
class add
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Thoughts on calling these outer and inner instead?

Comment on lines +216 to +217
env(batch::batch(alice, seq, batchFee, tfAllOrNothing),
txflags(tfDisallowXRP),
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Can this not be simplified like this?

Suggested change
env(batch::batch(alice, seq, batchFee, tfAllOrNothing),
txflags(tfDisallowXRP),
env(batch::batch(alice, seq, batchFee, tfDisallowXRP),

{
JLOG(ctx.j.trace())
<< "BatchTrace[" << batchId << "]:" << "too many flags.";
return temMALFORMED;
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This should probably also return temINVALID_FLAG

singleSignHelper(
STObject const& signer,
Slice const& data,
STTx::RequireFullyCanonicalSig requireCanonicalSig,
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I think this param can be removed, since rules is a global variable now.

That looks like it might get complicated, though, so I'm fine if you don't want to touch that in this PR.

Comment on lines -314 to -316
// We don't allow both a non-empty sfSigningPubKey and an sfSigners.
// That would allow the transaction to be signed two ways. So if both
// fields are present the signature is invalid.
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This comment should stay.

multiSignHelper(
STArray const& signers,
AccountID const& txnAccountID,
bool const fullyCanonical,
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IMO this should be aligned with singleSignHelper and either both should have the fullyCanonical bool or both should use the STTx::RequireFullyCanonicalSig value.

Comment on lines +463 to +478
// Make sure the MultiSigners are present. Otherwise they are not
// attempting multi-signing and we just have a bad SigningPubKey.
if (!batchSigner.isFieldPresent(sfSigners))
return Unexpected("Empty SigningPubKey.");

// We don't allow both an sfSigners and an sfTxnSignature. Both fields
// being present would indicate that the transaction is signed both ways.
if (batchSigner.isFieldPresent(sfTxnSignature))
return Unexpected("Cannot both single- and multi-sign.");

STArray const& signers{batchSigner.getFieldArray(sfSigners)};

// There are well known bounds that the number of signers must be within.
if (signers.size() < minMultiSigners ||
signers.size() > maxMultiSigners(&rules))
return Unexpected("Invalid Signers array size.");
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Looks like a lot of these checks are identical between checkBatchMultiSign and checkMultiSign - can they be incorporated into the multiSignHelper function? Should also have the side benefit of making the diff smaller.

@@ -36,13 +36,35 @@ class ApplyContext
{
public:
explicit ApplyContext(
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Should these constructors also have assert checks?

std::optional<uint256 const> const& batchId,
STTx const& tx_,
TER preclaimResult_,
XRPAmount baseFee_,
ApplyFlags flags,
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One more underscore missed

STTx const& tx_,
TER preclaimResult_,
XRPAmount baseFee_,
ApplyFlags flags,
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One more underscore missed

Comment on lines 191 to 215
if (stx.isFieldPresent(sfTxnSignature))
{
JLOG(ctx.j.trace())
<< "BatchTrace[" << batchId
<< "]:" << "inner txn cannot include TxnSignature."
<< "index: " << i;
return temINVALID_BATCH;
}

if (!stx.getSigningPubKey().empty())
{
JLOG(ctx.j.trace())
<< "BatchTrace[" << batchId
<< "]:" << "inner txn must include empty SigningPubKey."
<< "index: " << i;
return temINVALID_BATCH;
}

if (stx.isFieldPresent(sfSigners))
{
JLOG(ctx.j.trace()) << "BatchTrace[" << batchId
<< "]:" << "inner txn cannot include Signers."
<< "index: " << i;
return temINVALID_BATCH;
}
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These can all be combined into one if

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fixed: accc8e0

}

Json::Value
addBatchTx(
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Why isn't this function (and the below ones) part of the jtx helper file? Seems like there's some overlap there.


// temINVALID_BATCH: Batch: TransactionType missing in array entry.
{
auto const txBlob =
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This test is hard to audit. Can it be written to use the existing JSON structures, but instead of using batch::add, the JSON is constructed by hand?

env(batch::batch(alice, seq, batchFee, tfAllOrNothing),
batch::add(pay(alice, bob, XRP(10)), seq + 1),
batch::add(tx, seq + 2),
ter(tesSUCCESS));
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Shouldn't this test fail with temINVALID_FEE or something?

// This function is called by several different parts of the codebase
// under no circumstances will we ever accept an inner txn within a batch
// txn from the network.
auto const tx = *transaction->getSTransaction();
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Suggested change
auto const tx = *transaction->getSTransaction();
auto const sttx = *transaction->getSTransaction();

consider renaming this since tx conflicts with transaction

@@ -1475,12 +1495,13 @@ NetworkOPsImp::apply(std::unique_lock<std::mutex>& batchLock)
auto const toSkip =
app_.getHashRouter().shouldRelay(e.transaction->getID());

if (toSkip)
if (auto const txn = *(e.transaction->getSTransaction());
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Suggested change
if (auto const txn = *(e.transaction->getSTransaction());
if (auto const sttx = *(e.transaction->getSTransaction());

consider renaming txn since it conflicts with tx

{
protocol::TMTransaction tx;
Serializer s;

e.transaction->getSTransaction()->add(s);
txn.add(s);
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ditto

Comment on lines +250 to +251
std::vector<uint256>
getBatchTransactionIDs() const;
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Shouldn't this live on STTx, not STObject?

@@ -465,6 +465,12 @@ TRANSACTION(ttPERMISSIONED_DOMAIN_DELETE, 63, PermissionedDomainDelete, ({
{sfDomainID, soeREQUIRED},
}))

/** This transaction type wraps inner transactions for batch. */
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nit:

Suggested change
/** This transaction type wraps inner transactions for batch. */
/** This transaction type batches together transactions. */

std::vector<uint256>
STObject::getBatchTransactionIDs() const
{
assert(getFieldArray(sfRawTransactions).size() != 0);
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Suggested change
assert(getFieldArray(sfRawTransactions).size() != 0);
XRPL_ASSERT(isFieldPresent(sfRawTransactions) && getFieldArray(sfRawTransactions).size() != 0);

for (STObject const& rb : getFieldArray(sfRawTransactions))
batch_txn_ids_.push_back(rb.getHash(HashPrefix::transactionID));

assert(batch_txn_ids_.size() == getFieldArray(sfRawTransactions).size());
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Suggested change
assert(batch_txn_ids_.size() == getFieldArray(sfRawTransactions).size());
XRPL_ASSERT(batch_txn_ids_.size() == getFieldArray(sfRawTransactions).size());

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Same with all the other asserts in this PR

catch (std::exception const&)
{
}
return Unexpected("Internal signature check failure.");
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Shouldn't this line be in the catch block?

// skip batch txns
if (tx->isFlag(tfInnerBatchTxn))
{
assert(
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Suggested change
assert(
XRPL_ASSERT(

assert(
txpair.second &&
txpair.second->isFieldPresent(sfParentBatchID));
continue;
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Is it possible to write a unit test to cover this line?

XRPAmount baseFee,
Application& app_,
OpenView& base_,
std::optional<uint256 const> const& batchId,
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Suggested change
std::optional<uint256 const> const& batchId,
std::optional<uint256 const> const& batchId_,

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I just want to point out that the reason there is no underscore is because the .cpp file has no underscore for the arg. The reason for this is so that you don't end up with `batchId_(batchId_)

So imo all of these _ changes are probably incorrect. I will circle back to them though as I dont think its that important.

}

// Add the inner account to the unique signers set.
uniqueSigners.emplace(innerAccount);
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Some rough pseudo-code that might help with rearranging the code (I know it's a weird mishmash of syntaxes, it's pseudo-code for a reason):

set<Account> uniqueAccounts;
for innerTx in rawTransactions:
    // existing processing for each inner tx
    uniqueAccounts.insert(innerTx[sfAccount]);

set<Account> uniqueSigners;
uniqueSigners.insert(tx[sfAccount]);
for signer in signers:
    Account signerAccount = signer[sfAccount];
    if (!uniqueSigners.insert(signerAccount).second)
        // duplicate signer
        return temBAD_SIGNER;
    if (!uniqueAccounts.pop(signerAccount))
        // signerAccount isn't included in the raw transactions
        return temBAD_SIGNER;

// remove the outer account, if included
if (uniqueAccounts.contains(tx[sfAccount])
    uniqueAccounts.pop(tx[sfAccount]);
if (!uniqueAccounts.empty())
    // all BatchSigners and the outer account have been removed
    // any account left doesn't have a signature included
    // (I think this is the part that isn't currently being checked)
    return temBAD_SIGNER;

}

auto rawTxns = ctx.tx.getFieldArray(sfRawTransactions);
if (rawTxns.size() == 0)
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Shouldn't this check size >= 1? No reason to allow length-1 Batches, right?

}
return tesSUCCESS;
}

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Should there be a preclaim that makes sure all the Accounts in the inner Batches exist? Or is it fine to just trust that to the inner Batch validation?

{
JLOG(ctx.j.trace())
<< "BatchTrace[" << batchId << "]:" << "invalid batch signers.";
return temBAD_SIGNER;
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Please add a test that covers this line

JLOG(ctx.j.trace())
<< "BatchTrace[" << batchId
<< "]:" << "duplicate signer found: " << signerAccount;
return temBAD_SIGNER;
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Please add a test that covers this line

Comment on lines +106 to +108
JLOG(ctx.j.trace()) << "BatchTrace[" << batchId
<< "]:" << "hashes array size does not match txns.";
return temMALFORMED; // LCOV_EXCL_LINE
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Shouldn't this throw something more serious now, since this shouldn't be possible anymore? Maybe an assert instead?

<< "BatchTrace[" << batchId
<< "]:" << "TransactionType missing in inner txn."
<< "txID: " << hash;
return temINVALID_BATCH; // LCOV_EXCL_LINE
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Why is this line excluded from code coverage?

@@ -140,7 +140,7 @@ XRPNotCreated::visitEntry(
bool
XRPNotCreated::finalize(
STTx const& tx,
TER const,
TER const res,
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Unnecessary change now

!ctx.tx.getSigningPubKey().empty() ||
ctx.tx.isFieldPresent(sfSigners))
{
return temINVALID_FLAG;
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Judging by the comment, this line isn't possible to hit - in which case this should be excluded from code coverage.

Unsure whether that's the right error code though - perhaps it should be temBAD_SIGNATURE instead?

Comment on lines +141 to +143
<< "BatchTrace[" << batchId
<< "]:" << "batch cannot have an inner batch txn."
<< "txID: " << hash;
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nit:

Suggested change
<< "BatchTrace[" << batchId
<< "]:" << "batch cannot have an inner batch txn."
<< "txID: " << hash;
<< "BatchTrace[" << batchId << "]: "
<< "batch cannot have an inner batch txn. "
<< "txID: " << hash;

ditto with all the other comments

@@ -208,6 +208,7 @@ transResults()
MAKE_ERROR(temARRAY_EMPTY, "Malformed: Array is empty."),
MAKE_ERROR(temARRAY_TOO_LARGE, "Malformed: Array is too large."),
MAKE_ERROR(temBAD_TRANSFER_FEE, "Malformed: Transfer fee is outside valid range."),
MAKE_ERROR(temINVALID_BATCH, "Malformed: Invalid inner batch transaction."),
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Thoughts on just calling the error code temINVALID_INNER_BATCH? Feels a bit clearer.

@@ -2777,6 +2798,10 @@ NetworkOPsImp::pubProposedTransaction(
std::shared_ptr<STTx const> const& transaction,
TER result)
{
// never publish an inner txn inside a batch txn
if (transaction->isFlag(tfInnerBatchTxn))
return;
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Is there a way to cover this line with a test?

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