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Vasil Dimov

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Bitcoin CoreBitcoin Core54 commits0 candidates0 high risk
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Low 47 AI analysisMessage 73 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

private broadcast: enforce sending to unique node ids

This change adds a safety check inside Bitcoin Core's private transaction-broadcast feature. It prevents the same node from being chosen more than once to receive different transactions, because doing so could let that node figure out whic…

privacy leak mitigation in transaction broadcastdefensive invariant enforcement with Assume(false)prevents node-id reuse during private broadcast rounds
08b7c61fby Vasil Dimov+8−12 files
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Informational 15 AI analysisMessage 95 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: SOCKS5 proxy: expect that connection may be reset during handshake

This commit only changes a test helper script used during Bitcoin Core's automated testing. It makes the built-in SOCKS5 test proxy log expected connection resets as debug messages instead of printing full error backtraces. There is no cha…

9a8ef9b0by Vasil Dimov+10−21 file
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Informational 15 AI analysisMessage 95 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: SOCKS5 proxy: expect that connection may be reset when forwarding

This commit only changes Bitcoin Core's internal test framework. It makes the SOCKS5 proxy helper used in tests quieter when a test socket is closed unexpectedly, turning an ERROR log into a DEBUG log. There is no change to production Bitc…

eb320836by Vasil Dimov+52−122 files
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Informational 15 AI analysisMessage 72 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: add a regression test for private broadcast v1 retries

This commit only adds a new regression test file and registers it in the test runner. It does not change any production code in Bitcoin Core. The test verifies that if a private broadcast connection using the newer v2 transport fails, the …

5a3756d1by Vasil Dimov+200−02 files
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Informational 15 AI analysisMessage 90 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: make reusable filling of a node's addrman

This commit is a pure test-code refactoring. It moves a list of fake network addresses and a helper loop from one test file into the shared test framework so other tests can reuse it. No production Bitcoin Core code is changed, and nothing…

ab35a028by Vasil Dimov+122−1162 files
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Informational 15 AI analysisMessage 95 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: make reusable starting a standalone P2P listener

This commit is a simple code cleanup in Bitcoin Core's test suite. It moves a small helper that starts a temporary peer-to-peer listener from one test file into a shared test framework file so other tests can reuse it. There is no change t…

2333be9cby Vasil Dimov+26−162 files
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Informational 15 AI analysisMessage 90 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: make reusable SOCKS5 server starting

This commit is a test-only code cleanup. It moves the setup of a fake SOCKS5 proxy server used in automated tests into a shared helper function and lets the operating system pick an available network port instead of guessing one. It does n…

2ffa81faby Vasil Dimov+15−172 files
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Moderate 62 AI analysisMessage 53 · Thin
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

doc: add release notes for #35319

This commit adds release notes describing a privacy bug that was fixed in Bitcoin Core pull request #35319. The bug could accidentally reveal a user's real IP address when sending a transaction privately using the sendrawtransaction RPC wi…

Privacy leak: originator IP address exposureTor proxy bypass during P2P v1 fallbackPrivate broadcast (privatebroadcast/sendrawtransaction) affected
32d072a4by Vasil Dimov+20−01 file
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Low 47 AI analysisMessage 85 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

net: ensure no direct private broadcast connections

This change adds a safety check in Bitcoin Core's networking code to make sure a specific kind of private message-sending connection (called a 'private broadcast' connection) never connects directly over the internet. Instead, it must go t…

Prevents IP address leak for private broadcast connectionsAdds defensive Assume() invariant in network connection pathTargets Tor/I2P and proxied IPv4/IPv6 privacy semantics
d01b461fby Vasil Dimov+12−32 files
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Low 35 AI analysisMessage 73 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

net: use the proxy if overriden when doing v2->v1 reconnections

This commit fixes a bug in Bitcoin Core's networking code. When a user or operator had configured a specific proxy (a privacy-routing middleman) to be used for a particular outgoing connection, that proxy was correctly used on the first co…

Privacy/routing-policy bypass: per-connection proxy override ignored on fallback reconnectionNetwork-layer behavior inconsistency between initial connection and v2->v1 reconnectionFix is targeted and state-preserving: stores override in CNode and reconnection queue
fd230f94by Vasil Dimov+11−12 files
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Informational 23 AI analysisMessage 100 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: avoid non-loopback network traffic from node_init_tests/init_test

This is a test-hardening change, not a fix for an exploitable vulnerability in live Bitcoin Core. The patch stops automated tests from accidentally sending real network traffic (router NAT-PMP packets and DNS queries) to non-localhost dest…

Network egress from test harnesses can leak test activity, trigger IDS, or interact with local routers/DNS resolversNATPMP and DNSSEED are disabled only inside test setup code via ForceSetArgNo change to production defaults or consensus/network code
1c500b17by Vasil Dimov+5−12 files
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Informational 23 AI analysisMessage 76 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

net: make CConnman::m_nodes_mutex non-recursive

This commit changes a single internal lock in Bitcoin Core's networking code from a recursive mutex (one that lets the same thread lock it multiple times safely) to a plain non-recursive mutex. It also adds many compile-time and runtime ch…

Mutex hardening: recursive mutex replaced with non-recursive mutexNew AssertLockNotHeld annotations added at function entry pointsCompile-time thread-safety annotations added (EXCLUSIVE_LOCKS_REQUIRED)
11713c9fby Vasil Dimov+105−412 files
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Informational 18 AI analysisMessage 73 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

net: drop the only recursive usage of CConnman::m_nodes_mutex

This is a small internal cleanup in Bitcoin Core's network code. It removes the only case where a particular network lock (m_nodes_mutex) was acquired twice in a nested/recursive way. The change reorders the logic so the list of high-bandw…

Eliminates recursive locking on CConnman::m_nodes_mutexSimplifies lock-order reasoning in peer-manager network pathNo functional change to BIP152 compact-block peer selection logic
aec4fa2dby Vasil Dimov+13−131 file
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Informational 15 AI analysisMessage 95 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

ci: add one more routable address to the VMs (docker containers)

This commit changes the Bitcoin Core continuous integration (CI) test setup script. It adds a second Docker network with a fixed IPv4 address (1.1.1.5) and assigns a fixed IPv6 address (1111:1111::5) to the test container. The purpose is t…

75cf9708by Vasil Dimov+4−01 file
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Informational 15 AI analysisMessage 95 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: make feature_bind_port_(discover|externalip).py auto-detect the skip condition

This commit only changes Bitcoin Core's internal functional test scripts. It removes a manual command-line flag that testers had to pass to skip certain network-binding tests, and instead makes the tests automatically detect whether the re…

1b93983bby Vasil Dimov+74−413 files
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Moderate 50 AI analysisMessage 85 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

net_processing: don't modify addrman for private broadcast connections

This change prevents Bitcoin Core from storing address information learned from private broadcast connections in its internal address database (addrman). The concern is that data from these special, non-public connections could later be sh…

Information-flow control: prevents data from private broadcast channels from entering the public addrman gossip poolAddrman integrity: reduces risk of service-bit metadata injection from non-public peersPrivacy: limits propagation of peer relationship metadata via ADDR/ADDRV2 gossip
1ed1a124by Vasil Dimov+32−12 files
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Informational 15 AI analysisMessage 100 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: use port 0 for I2P addresses in p2p_private_broadcast.py

This is a minor fix to a Bitcoin Core test script. It changes the network port number used for I2P test addresses from 8333 to 0, because Bitcoin Core requires I2P addresses to use port 0. The change only affects an automated functional te…

da7f70a5by Vasil Dimov+1−11 file
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Informational 15 AI analysisMessage 100 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: let connections happen in any order in p2p_private_broadcast.py

This commit fixes a flaky automated test in Bitcoin Core. It does not change any production code, network protocol, or wallet behavior. The test previously assumed the 11th outbound connection would always be a private broadcast, which cou…

a8ebcfd3by Vasil Dimov+85−231 file
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Informational 15 AI analysisMessage 100 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: don't always assert NUM_PRIVATE_BROADCAST_PER_TX broadcasts

This is a one-line fix in a Bitcoin Core test script. It changes a test assertion to check the correct expected number of peer broadcasts, preventing a flaky test failure. It does not change any production code or network behavior, so it h…

c462e54fby Vasil Dimov+1−11 file
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Informational 15 AI analysisMessage 90 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: move abortprivatebroadcast test at the end

This commit only moves two test blocks to the end of a single functional test file. It fixes a flaky test failure caused by mock time advancing and prematurely disconnecting private broadcast connections. There is no change to production c…

37105663by Vasil Dimov+19−191 file
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