Cross-Chain Wallet Identity Resolution Linking Stellar to Ethereum and Solana Addresses

[Inkman007]

Summary

Build a cross-chain identity resolution module that uses on-chain bridging transactions, shared deposit addresses, and behavioral fingerprinting to link Stellar wallet addresses to their counterpart Ethereum and Solana addresses.

Motivation

Wash-trade operators increasingly bridge funds between chains to obscure the trail. A Stellar wallet with a low base risk score may be the counterpart of a flagged Ethereum address. Cross-chain linking exposes this and allows propagated risk to incorporate cross-chain guilt-by-association.

Proposed Architecture

detection/
  cross_chain/
    bridge_detector.py      <- detect Stellar <-> EVM bridge transactions
    behavioral_matcher.py   <- fingerprint matching: timing, amount distributions
    identity_graph.py       <- cross-chain wallet identity graph
    resolver.py             <- resolve(stellar_address) -> {eth: [...], sol: [...]}

Linking Signals (prioritized)

1. Bridge transactions: SEP-0006 anchor deposit/withdrawal with Ethereum address in memo
2. Shared deposit address: same CEX deposit used by both chains
3. Amount fingerprint: matching trade amounts within 0.1% within 60s window
4. Timing correlation: Pearson correlation of cross-chain activity time series

Acceptance Criteria

• Bridge transaction linker identifies 90%+ of known bridge pairs in test dataset
• Identity graph persists to SQLite and is queryable by wallet address
• Linked Ethereum risk score propagates to Stellar wallet in propagate_risk_scores
• False-positive rate < 5% on manually-labeled cross-chain identity test set

References

• Existing: detection/risk_propagation.py, detection/wallet_graph.py

[Chrisbankz0]

Hello, I’m a full stack developer with hands-on experience building with variety of tools including Nextjs, nodejs, nestjs, React, Typescript and more

I focus on writing clear, maintainable code and making sure features work as expected end to end, not just in isolation. I communicate progress regularly and keep things transparent as I work. I’m confident I can complete this task within an ETA of 4 HOURS

[grantfox-oss]

🦊 GrantFox — @Chrisbankz0 has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #116)
2. Your PR will be reviewed by the Ledger-Lenz maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign campaign!

@Chrisbankz0's PR #164 was approved and merged by @Inkman007.

🏆 @Chrisbankz0: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (241 total points). Track your full progress on GrantFox.

👏 Great work, @Chrisbankz0! Keep contributing to Ledger-Lenz.

[Inkman007]

Closing as part of a board refresh — this issue is being superseded by a new batch of 50 advanced issues covering the project comprehensively. If this work is still relevant and not covered by the new batch, feel free to reopen.