# The Blockchain Oracle Problem in Decentralized Finance--A Multivocal Approach
## Appendix A
### Bluzzle DeFi Oracle
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* Jared Compound (2021) Jared Compound: Open Price Feed Live.
* Carl (2021) Carl, T. Synthetic Users Returns 15 Billion After an Oracle Issue with Their Exchange Platform. Available online: [[https://bitcoinexchangeguide.com/syntheticix-users-returns-1-billion-after-an-oracle-issue-with-their-exchange-platform/](https://bitcoinexchangeguide.com/syntheticix-users-returns-1-billion-after-an-oracle-issue-with-their-exchange-platform/)]([https://bitcoinexchangeguide.com/syntheticix-users-returns-1-billion-after-an-oracle-issue-with-their-exchange-platform/](https://bitcoinexchangeguide.com/syntheticix-users-returns-1-billion-after-an-oracle-issue-with-their-exchange-platform/)) (accessed on 18 April 2021).
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* Campbell (2021) Campbell, L. MakerDAO Systems Struggles Amid Volatility-$4M in Dai Left. Available online: [[https://defrate.com/makerdao-shutdown-concerns/](https://defrate.com/makerdao-shutdown-concerns/)]([https://defrate.com/makerdao-shutdown-concerns/](https://defrate.com/makerdao-shutdown-concerns/)) (accessed on 19 January 2021). * Hacken Biggest DeFi Hacks of 2020 Report. Available online: [[https://hacken.io/researches-and-investigations/biggest-defi-hacks-of-2020-report/](https://hacken.io/researches-and-investigations/biggest-defi-hacks-of-2020-report/)]([https://hacken.io/researches-and-investigations/biggest-defi-hacks-of-2020-report/](https://hacken.io/researches-and-investigations/biggest-defi-hacks-of-2020-report/)) (accessed on 2 March 2021). * DeShazer (2021) DeShazer, M. Flash Loan, Re-Entrancy Attack and DEX Oracle Manipulation Exploit on Ethereum (Trojan Coin Bricks Project Instructions). Available online: [[https://medium.com/@mikedeshazer/flash-loan-reentry-attack-and-dex-oracle-manipulation-exploit-on-ethereum-trojan-coin-bricks-7969820589d7](https://medium.com/@mikedeshazer/flash-loan-reentry-attack-and-dex-oracle-manipulation-exploit-on-ethereum-trojan-coin-bricks-7969820589d7)]([https://medium.com/@mikedeshazer/flash-loan-reentry-attack-and-dex-oracle-manipulation-exploit-on-ethereum-trojan-coin-bricks-7969820589d7](https://medium.com/@mikedeshazer/flash-loan-reentry-attack-and-dex-oracle-manipulation-exploit-on-ethereum-trojan-coin-bricks-7969820589d7)) (accessed on 14 February 2021). * Tarasov (2020) Tarasov, A. Millions Lost: The Top 19 DeFi Cryptocurrency Hack of 2020. Available online: [[https://cryptobriefing.com/50](https://cryptobriefing.com/50)]([https://cryptobriefing.com/50](https://cryptobriefing.com/50)) -million-lost-the-top-19-defi-cryptocurrency-hacks-2020/ (accessed on 9 March 2021). * Cao et al. (2021) Cao, Y.; Zou, C.; Cheng, X. Flashot: A Snapshot of Flash Loan Attack on DeFi Ecosystem. _arXiv_ **2021**, arXiv:2102.00626. * Kain (2021) Kain, W. Synthetix Response to Oracle Incident. Available online: [[https://blog.syntheticix.io/response-to-oracle-incident/](https://blog.syntheticix.io/response-to-oracle-incident/)]([https://blog.syntheticix.io/response-to-oracle-incident/](https://blog.syntheticix.io/response-to-oracle-incident/)) (accessed on 21 March 2021). * Davies (2021) Davies, A. How to Audit a Smart Contract? A Guide.