fix: accept RTC faucet wallet addresses by ethever · Pull Request #4893 · Scottcjn/Rustchain

ethever · 2026-05-12T22:26:37Z

Summary

fixes Bug: Faucet rejects valid RTC wallet addresses #4890 by accepting native RTC-prefixed wallet addresses in the live root faucet.py endpoint
keeps invalid wallet prefixes rejected
adds legacy faucet regressions for native RTC acceptance and invalid-prefix rejection

Validation

git diff --check origin/main...HEAD
python3 -m py_compile faucet.py tests/test_legacy_faucet_json_validation.py
uv run --no-project --with pytest --with flask --with flask-cors --with requests python -m pytest tests/test_legacy_faucet_json_validation.py tests/test_faucet.py -q -> 9 passed
python3 tools/bcos_spdx_check.py --base-ref origin/main -> OK

Wallet/miner ID for bounty payout: b3a58f80a97bae5e2b438894aa85600cb0c066RTC

No live faucet or production wallet mutation was performed.

- allow native RTC-prefixed wallet addresses in the legacy faucet - add regression coverage for native RTC wallets and invalid prefixes

github-actions · 2026-05-12T22:26:46Z

Welcome to RustChain! Thanks for your first pull request.

Before we review, please make sure:

Your PR has a BCOS-L1 or BCOS-L2 label
New code files include an SPDX license header
You've tested your changes against the live node

Bounty tiers: Micro (1-10 RTC) | Standard (20-50) | Major (75-100) | Critical (100-150)

A maintainer will review your PR soon. Thanks for contributing!

ethever · 2026-05-12T22:33:48Z

Checklist note: I do not have permission to apply repository labels from this fork. This is a small live-path faucet compatibility fix for #4890; I would classify it as BCOS-L1 unless maintainers prefer another tier. Local validation and BCOS SPDX check are listed in the PR body.

saim256

Requesting changes because the new RTC branch accepts malformed native-wallet strings, not just native RTC addresses.

The current predicate is:

if not wallet.startswith(('0x', 'RTC')) or len(wallet) < 10:

That fixes the specific happy-path example from #4890, but it also accepts values like RTCnotvalid, RTCzzzzzzzzzz, or any other arbitrary string with the RTC prefix and length >= 10. Native RustChain wallet examples in the issue and bounty claims use RTC plus a 40-character hex payload, so the validator should either enforce that shape for the RTC branch or add an intentionally documented reason for accepting loose aliases.

Suggested tightening:

RTC_WALLET_RE = re.compile(r"^RTC[0-9a-fA-F]{40}$")
...
valid_wallet = (wallet.startswith("0x") and len(wallet) >= 10) or RTC_WALLET_RE.fullmatch(wallet)

Please also add a regression such as RTCnot-a-native-wallet or RTCzzzzzzzzzz returning 400, alongside the existing valid RTC acceptance test.

Validation run locally:

python -m pytest tests\test_legacy_faucet_json_validation.py tests\test_faucet.py -q -> 9 passed
python -m py_compile faucet.py tests\test_legacy_faucet_json_validation.py -> passed
git diff --check origin/main...HEAD -> passed
python tools\bcos_spdx_check.py --base-ref origin/main -> OK

No live faucet or production wallet testing was performed.

508704820

Code Review: Accept RTC Faucet Wallet Addresses

Summary

Updates faucet validation to accept both Ethereum-style (0x...) and native RTC (RTC...) wallet addresses. Previously only 0x-prefix was accepted, blocking native RTC wallets.

What Works Well

Dual format support: Accepts both 0x and RTC prefixes
Test coverage: Tests both unknown prefix rejection and valid RTC addresses
Important for our team: Our canonical wallet RTC15e1241... was previously rejected by the faucet

Verdict: Approve

Important fix — native RTC wallets should be first-class citizens in the ecosystem.

TJCurnutte

Reviewed the focused faucet validation change. It matches the issue's requested live-path fix: native RTC-prefixed addresses are now accepted while unrelated prefixes are still rejected, and the regression tests cover both cases.\n\nValidation run:\n- python3 -m py_compile faucet.py tests/test_legacy_faucet_json_validation.py\n- python3 -m pytest tests/test_legacy_faucet_json_validation.py -q\n- git diff --check\n\nOne non-blocking follow-up: if the project wants to prevent typoed faucet destinations, consider tightening both accepted formats later (for example + 40 hex chars and + 40 hex chars) instead of prefix + length only. I would not block this PR on that because it preserves the existing loose validation style and fixes the reported RTC rejection.

TJCurnutte · 2026-05-12T23:22:14Z

Small correction to my previous review text: the intended non-blocking follow-up examples were RTC + 40 hex chars and 0x + 40 hex chars. The PR comment renderer lost those backticked fragments from my shell invocation, but the validation result and review position are unchanged.

shuibui

Code Review: Security Fix

Good security fix. Atomic rate limiting / fail-closed patterns are correct.

Verdict: Approve.

loganoe

The included tests pass locally, but the new validation is too broad for native RustChain wallets. The route now accepts any string starting with RTC and length >= 10, so malformed addresses such as RTCnot-a-native-wallet receive a successful drip and are recorded.

Local repro on this branch:

POST /faucet/drip with {"wallet": "RTCnot-a-native-wallet"} returns 200 with ok: true.

Please validate the canonical native wallet shape, e.g. RTC plus the expected 40 hex characters, and add a regression for malformed RTC... input. The legacy 0x... behavior can stay as-is if that compatibility is intentional.

shuibui

Code Review: Approve

Good fix.

**Verdict: Approve.

shuibui

Code Review: Approve

Good fix. Addresses the issue correctly.

**Verdict: Approve.

shuibui

Code Review: Approve

Good fix. Addresses the issue correctly.

**Verdict: Approve.

508704820 · 2026-05-13T00:38:08Z

Code Review: Accept RTC faucet wallet addresses

Summary

Same fix as #4892 (saim256) and our #4890 — faucet rejects native RTC wallet addresses because validation only accepts 0x prefix.

Comparison

Aspect	#4890 (Xeophon)	#4892 (saim256)	#4893 (ethever)
Approach	Issue report only	Fix + tests	Fix + tests
Prefix check	`0x` or `RTC`	`0x` or `RTC`	`0x` or `RTC`
Test coverage	None	2 tests	3 tests (includes unknown prefix test ✅)
Uses tuple	Yes	Yes	Yes

Positive ✅

Unknown prefix test — adds test for BAD prefix, ensuring the validation properly rejects non-0x/non-RTC addresses
Same correct fix as fix: accept native RTC faucet wallets #4892

Note

All three PRs fix the same bug. #4893 has the most comprehensive test coverage with the unknown prefix rejection test.

LGTM ✅

Review quality: Comparative review

shuibui

Code Review: Approve

Good fix.

**Verdict: Approve.

shuibui

Code Review: Approve

Good fix.

**Verdict: Approve.

- require native RTC faucet wallets to match RTC plus 40 hex chars - add a regression for malformed RTC-prefixed wallet strings

ethever · 2026-05-13T00:54:48Z

Addressed the requested RTC validation tightening in commit 541c784.

Changes:

Added RTC_WALLET_RE = re.compile(r'^RTC[0-9a-fA-F]{40}$').
Kept the existing legacy 0x branch behavior.
Replaced the loose wallet.startswith(('0x', 'RTC')) check with is_valid_wallet_address().
Added a regression that rejects RTCzzzzzzzzzz with 400 Invalid wallet address.

Validation run:

git diff --check origin/main...HEAD -> passed
python3 -m py_compile faucet.py tests/test_legacy_faucet_json_validation.py -> passed
uv run --no-project --with pytest --with flask --with flask-cors --with requests python -m pytest tests/test_legacy_faucet_json_validation.py tests/test_faucet.py -q -> 10 passed
python3 tools/bcos_spdx_check.py --base-ref origin/main -> OK

saim256

Reviewed current head 541c784ce97b0b6aa7fc9ded1bfbffa9a9dff85f after the RTC validation follow-up.

The blocker from my prior review is fixed. The PR no longer accepts arbitrary RTC... strings: native RTC wallets now must match ^RTC[0-9a-fA-F]{40}$, while the existing legacy 0x branch behavior is preserved. The added malformed-wallet regression covers RTCzzzzzzzzzz returning 400 Invalid wallet address, and valid native RTC wallets are accepted.

Validation performed locally:

python -m pytest tests\test_legacy_faucet_json_validation.py tests\test_faucet.py -q -> 10 passed
python -m py_compile faucet.py tests\test_legacy_faucet_json_validation.py -> passed
python -m ruff check faucet.py tests\test_legacy_faucet_json_validation.py --select E9,F821,F811 --output-format=concise -> passed
git diff --check origin/main...HEAD -> passed
python tools\bcos_spdx_check.py --base-ref origin/main -> OK

No live faucet, production wallet, or destructive testing was used.

himanalot

Reviewed the live faucet.py endpoint and the legacy faucet tests. The PR accepts native RTC wallet addresses with a strict RTC[0-9a-fA-F]{40} check, keeps the existing Ethereum-style fallback behavior unchanged, and adds regressions for accepted native wallets plus malformed/unknown prefixes.

I do not see a blocking issue in this patch. Approved.

guangningsun · 2026-05-14T12:43:44Z

PR Review — Standard Quality ✓

PR: #4893 — Fix: accept RTC faucet wallet addresses

What I reviewed

faucet.py
tests/test_legacy_faucet_json_validation.py

Observations

Adding import re for regex-based wallet address validation — proper regex validation ensures only valid RTC wallet addresses can request faucet drips, preventing abuse.
New test test_legacy_faucet_rejects_non_string_wallet validates that non-string wallet addresses are rejected with 400 Bad Request.
Faucet spam prevention — without proper validation, attackers could request unlimited drips using malformed addresses.

LGTM.

Bounty: #2782
Disclosure: I received RTC compensation for this review.

fix: accept RTC faucet wallets

98b05e3

- allow native RTC-prefixed wallet addresses in the legacy faucet - add regression coverage for native RTC wallets and invalid prefixes

github-actions Bot added BCOS-L1 Beacon Certified Open Source tier BCOS-L1 (required for non-doc PRs) tests Test suite changes size/S PR: 11-50 lines labels May 12, 2026

ethever mentioned this pull request May 12, 2026

Bug: Faucet rejects valid RTC wallet addresses #4890

Closed

saim256 suggested changes May 12, 2026

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saim256 mentioned this pull request May 12, 2026

[BOUNTY] Code Review Bounty Program — Review PRs, Earn RTC (100 RTC Pool) Scottcjn/rustchain-bounties#73

Open

508704820 reviewed May 12, 2026

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TJCurnutte reviewed May 12, 2026

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shuibui approved these changes May 12, 2026

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loganoe suggested changes May 13, 2026

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shuibui approved these changes May 13, 2026

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fix: tighten RTC faucet wallet validation

541c784

- require native RTC faucet wallets to match RTC plus 40 hex chars - add a regression for malformed RTC-prefixed wallet strings

saim256 approved these changes May 13, 2026

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himanalot approved these changes May 14, 2026

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guangningsun mentioned this pull request May 14, 2026

[ONBOARD: 2 RTC] Star + Review an Open PR Scottcjn/rustchain-bounties#2782

Open

Scottcjn merged commit 403a116 into Scottcjn:main May 14, 2026
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ethever commented May 12, 2026

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Code Review: Accept RTC Faucet Wallet Addresses

Summary

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Verdict: Approve

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TJCurnutte commented May 12, 2026

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Code Review: Security Fix

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Code Review: Approve

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Code Review: Approve

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508704820 commented May 13, 2026

Code Review: Accept RTC faucet wallet addresses

Summary

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Positive ✅

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Code Review: Approve

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Code Review: Approve

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ethever commented May 13, 2026

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guangningsun commented May 14, 2026

PR Review — Standard Quality ✓

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