關於 salt function ，我們在網路上蒐集到這些相關的討論、資訊與評價

https://youtu.be/WjhKZU-H5MI
Braised beef brisket with tomatoes and carrot with high speed cooker

Ingredients:
Frozened beef brisket 3 lbs
Tomatoes 5 Nos.
Shallots a bunch
Carrots (small) 8 logs

Preparation/Steps:
1. Beef brisket, remove plastics. Put in high speed cooker. Add in cooking salt 1 tbsp and boiled up water 1L. Cover up the wok. Heat up for 15 minutes.
2. Tomatoes, rinse with tap water. Divide each one into 4 shares.
Shallots, get them peeled. Rinse with tap water.
Carrots, rinse its skin with tap water.
3. Beef briskets have been blanched, pour away water. Rinse with tap water. Drain.
4. Rinse the cooker with detergent properly.
5. Beef brisket, put into pot. Add seasoning:
a. Pepper 1 tbsp
b. Tomato ketchup half bottle
c. Chicken sauce 1 tbsp
d. Rock sugar 2 big cubes
Mix well. Cover up the pot. Use tendons function, braise for 40 minutes.
6. In the last 6 minutes, add in:
a. Carrot
b. Tomatoes
c. Shallots
Mix well.
7. Restart the high speed cooker, use "tendons" function, braise for 40 minutes again.
8. Complete. Put on plate. Serve.

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Beef Rib Fingers with Tomatoes & Carrots in Tomato Sauce🥘Tender, Succulent Meat😋Wondetful Sauce🍅

鮮茄紅蘿蔔燴牛肋條
肉質淋滑好味
香濃蕃茄汁
滋味無窮!

Beef Ribs in Tomato Sauce

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📜 [專欄新文章] EIP-1014 產生可控的智能合約地址

✍️ 飛天的狸貓

📥 歡迎投稿： https://medium.com/taipei-ethereum-meetup #徵技術分享文 #使用心得 #教學文 #medium

先前在 Solidity Taiwan 讀書會 群中看到一個討論，裡面應該是一個套利機器人，打開他的合約會發現 Contract 標記著 Reinit，大致上意思是在相同地址上曾經 Self Destruct 後又佈署新的 Byte Code。這其中就用到了 Vitalik 提出的 EIP-1014，來達成在固定的地址上佈署。

合約地址是怎麼產生的

如果對於以太坊智能合約佈署不陌生，應該會知道合約地址是依據佈署者的地址和他的 Nonce 來決定的。假如地址 0xa1 在 Nonce 為 1 的交易中建立了合約，合約地址是 0x01，則當他到了其他鏈而再次使用 Nonce 1 建立合約時，就也會得到相同的合約地址 0x01。

而在以太坊中，Nonce 是嚴格遞增的，這主要是為了避免雙花攻擊，因此很顯然的，再次佈署到同一個地址是不可行的。而在 EIP-1014 以前，在合約中建立的子合約也是透過這個方式達成。

EIP-1014 做了什麼

前面說到合約中可以建立子合約，通常使用的指令是 create，這個指令便會根據主合約的地址與合約本身的 Nonce 來算出子合約的地址。在 EIP-1014 中，提出了另外一個指令 create2，接受的參數是一個 salt 和 init code（建立合約的 Byte Code）。這個指令會透過 keccak256 雜湊，混和參數和主合約的地址來算出子合約地址。

可以留意到，salt 和 init code 都是可控的，主合約地址是固定的，因此就讓子合約地址是可控制的（當然不是說想要產生在哪裡就在哪裡）。在 create 中，Nonce 是漸次增加的，所以無法重複，並且若要控制到特定 Nonce 需要發起多筆交易。

但是當再次佈署到相同地址時，EIP-684 說明若該地址 Nonce 不為零或者存在 Byte Code 時將直接拋出錯誤，因此若要佈署到同一個位置，就必須利用 Self Destruct 來抹去 Nonce 和 Byte Code。

為什麼要 EIP-1014

EIP-1014 在起初是基於 State Channel 的需求，主要是因為某些狀況下可能還沒有要和合約做互動，但需要先知道合約地址。因此只要是需要先知道地址，但沒有要立即使用的合約就十分適合通過這個指令來建立。

例如對於交易所來說，替所有要入金的人建立私鑰有管理上的問題，若透過智能合約則相對有彈性，但卻不是所有申請地址的人都真的會入金，此時就適合利用這個指令先行取得地址，當真的有入金時再佈署合約。

如何使用 EIP-1014

除了直接寫 Opcode 以外，Solidity 0.6.2 加入了利用 create2 建立合約的語法。使用方式是 new Contract{salt: someByte}(...args)，其中 new Contract(...args) 就是傳統的佈署方式，而 someByte 是一個 bytes32。

資安疑慮

回到開頭，Etherscan 之所以會標記 Reinit 則是因為可能有資安的疑慮。回顧地址產生的過程，兩個參數都沒有限制條件，因此碰撞的可能也是存在的。如果不肖人士先佈署一個正常的合約，接著通過 Self Destruct 刪除後再佈署假的合約，就可能讓沒注意到的使用者上當。

但或許因為碰撞的機會太低，所以並不太構成問題。而若真的要從使用者的角度防範，可以通過檢查合約有沒有 Self Destruct、Delegate Call、Call Code 指令（如果沒有的話無法刪除合約，再次 create2 時就會被 revert）來避免。

2021/4/23 補充

後來看了幾個討論，也想了一下，資安的疑慮應該遠不只上面這麼簡單。
例如一個宣稱鎖定 ERC-20 代幣的合約，雖然使用者可以檢閱程式碼，並確認其中解鎖 function unlock() 必須在 uint256 block 之後才能執行，並且 block 是無法變更的，但攻擊者可能透過上述方法來消除 block 狀態，進而提前執行 unlock。

參考資料

https://consensys.net/diligence/blog/2019/02/smart-contract-security-newsletter-16-create2-faq/

https://www.chainnews.com/zh-hant/articles/803272341363.htm

如有錯誤敬請指正，原文載於：https://limaois.me/archives/265

EIP-1014 產生可控的智能合約地址 was originally published in Taipei Ethereum Meetup on Medium, where people are continuing the conversation by highlighting and responding to this story.

👏 歡迎轉載分享鼓掌

A chocolate version from the Taiwanese Castella cake that got over 33 million views. With this recipe, you can make it easier than the previous Taiwanese Castella cake. Try to make a very moist and soft chocolate castella cake!

Taiwanese Castella Cake Recipe 33 million views！
https://youtu.be/840D3AcTmcM

SUBSCRIBE➢ https://bit.ly/2Re4VzS
Please give me a thumbs up👍 or comment if you like the video. It'll help motivate me!

Please follow me on Instagram.
➢https://www.instagram.com/emojoiecuisine


＊＊＊Instructions is explained in the subtitles［cc］＊＊＊
➢18cm square cake mold
45g 52-58% black chocolate
70g unsalted butter * vegetable oil is also ok
70g milk
100g flour
15g cocoa powder
6 egg yolks
1 teaspoon vanilla extract
6 egg whites
100g sugar
A pinch of salt
10g cornstarch or potato starch
25g chocolate chips
Bake in the oven with hot water at 150°C for 65-70 minutes


--------- Amount for other molds-----------
➢18cm round cake mold or 15cm square mold
30g 52-58% black chocolate
45g unsalted butter
45g milk
65g flour
10g cocoa powder
4 egg yolks
1 teaspoon vanilla extract
4 egg whites
65g sugar
A pinch of salt
6g cornstarch or potato starch
15g chocolate chips
Bake in the oven with hot water at 150°C for 45 - 50 minutes

➢15cm round cake pan
Divide all the ingredients in half.
Bake in the oven with hot water at 150℃ for 40 - 45 minutes.

➢18cm Pound Cake Mold
Cut all the ingredients into 1/3.
Bake in the oven with hot water at 150℃ for 30 - 35 minutes.

➢24cm Square Cake Mold
Fill all ingredients 1.7 times.
Bake in the oven with hot water at 150℃ for 80 - 90 minutes.


* Preheating is necessary. You must preheat the oven, and please start baking when the oven reaches a set temperature.

* The result of baking may be changed depending on each oven at home. The temperature and the baking time in this recipe are only a guide. Please check the degree of baking stuff before taking it out from the oven, and then take it out.

* In the video, it’s baked in the normal mode of heating up and down. When using the convection function or gas oven, lower the temperature by 10-20 ℃ and bake.
The oven I used in the video: ELECTROLUX EOC6631

#taiwanesecastella　#chocolatecake　#taiwanesecastellachocolatecake
---------------------------------------------
Please refrain from uploading the video to other SNS without permission, as this is a violation of "YouTube Fair Use".

⬇️⬇️English recipe follows⬇️⬇️
電飯煲自家製牛肚麪

材料：
金錢肚1磅
八角2粒
花椒15粒
果皮1片
薑幾片
辣椒仔1隻

處理：
1. 真空煲煲滾水，加入鹽1湯匙及酒1湯匙，放金錢肚。
2. 用“再加熱”功能，煲15分鐘。
3. 過了15分鐘，金錢肚已解凍和出水，倒去水分，清水洗乾淨，擎乾水。

烹調：
1. 金錢肚，放入煲。
2. 辣椒仔、薑片及冰糖，放入煲。
3. 花椒及八角，沖洗乾淨，放入煲。
4. 加入調味料：
a. 蠔油1湯匙
b. 老抽半茶匙
加入水150毫升，攪勻。
5. 用“豆/蹄筋”功能，炆40分鐘。
6. 已炆了40分鐘，及焗了20分鐘。
7. 完成，上碟。
8. 大火煲滾半升水，放生麪煮至軟身，放入碗。
9. 金錢肚，切件，放入碗。
10. 灑上蔥花。
11. 完成，上碟。

用明火炆：
1. 煲滾後，轉中慢火，炆45分鐘。
2. 炆了45分鐘後，不要打開蓋，焗20分鐘。
3. 再開大火，滾起後轉中慢火，再炆20分鐘。
4. 完成，可享用。

Homemade beef tripe noodle with rice cooker

Ingredients:
Honeycomb tripes 1 lb
Star anise 2 Nos.
Sichuan peppercorns 15 Nos.
Dried orange peel 1 pc
Ginger several slices
Chili 1 No.

Preparation:
1. Boil up water in vacuum rice cooker. Add salt 1 tbsp and Shaoxing wine 1 tbsp. Put honeycomb tripes.
2. Use "Reheat" function, cook for 15 minutes.
3. Honeycomb tripe has been defrosted and soaked well. Pour away water. Rinse it thoroughly. Hang dry.

Steps:
1. Honeycomb tripe, put into cooker.
2. Chili, ginger slices and rock sugar, put into pot.
3. Sichuan peppercorns and star anise, rinse thoroughly. Put into cooker.
4. Add seasoning:
a. Oyster sauce 1 tbsp
b. Dark soya sauce 0.5 tsp
Add water 150ml, mix well.
5. Use "bean/tendon" function, braise for 40 minutes.
6. Have already braised for 40 minutes. Leave it for 20 minutes.
7. Complete. Put on plate.
8. Heat up water 0.5L at high flame in pot. Put raw noodles, cook until it turns soft, put in a bowl.
9. Honeycomb tripe, cut in slices. Put in a bowl.
10. Put green onion cubes on top.
11. Complete.

If it is prepared by gas cooker:
1. Turn to medium~low flame after boils up. Braise for 45 minutes.
2. Do not lift up the lid after braising 45 minutes. Leave it for 20 minutes.
3. Turn to high flame and wait for boiling up again. Turn to medium~low flame after boils up. Braise for 20 minutes more.
4. Complete. Serve.

??粉麵飯?(系列)
https://www.youtube.com/playlist?list=PLkU_SdeTtB_Q5A3Mh4IVWiSQecc_DX2Zp

1.雞煨麵
https://youtu.be/8OVQ5jecY4c

2. 簡單番茄炒飯https://youtu.be/GKBCyY7IrJw

3. 韓式炒年糕https://youtu.be/cDNxhyWypOo

4. 咁誇張炒飯https://youtu.be/cdPz8kVi6k8

5.錦繡窩麵 家庭大阪https://youtu.be/GW9aJYisgrA

6.重口感 榨菜肉絲 上海麵https://youtu.be/BlMhFgQT7vc

7.加插板榨菜肉絲炒麵https://youtu.be/yE4bSXfOyjI

8.豬頸肉蕃茄烏冬https://youtu.be/IGpLMenYVsE

9.無敵鴛鴦飯https://youtu.be/yX7Zz6583kQ

10.凍檬燒豬髀
https://youtu.be/b1_4RJKjCSY

11.若果肉鬆炒飯https://youtu.be/sZCMMC4qJjE

12肉燥麵豉炆米https://youtu.be/VahQh8Pr1Ok

13. 懷舊銀針粉https://youtu.be/bXW19mFXM0o

14. 鹹蛋白炒飯https://youtu.be/SVoxvVTiVUI

15. 芽菜肉絲炒米粉https://youtu.be/-Jvdw_WFOYM

16. 豬潤湯米https://youtu.be/O6Oe5GaEZa0

17. 蠔油炒飯https://youtu.be/eCAth2B23K0

18.電飯煲糯米飯https://youtu.be/LWqYj9IFmEg

19. 豉油王炒麵https://youtu.be/XP2fo5_r9Yk

20. 清湯麵https://youtu.be/9ZQwjIVcnLM

21. 芒果糯米飯https://youtu.be/fBmsUpcaO8g

22. 油豆腐粉絲湯https://youtu.be/4w0DEkGszi0

23. 韓國炒粉絲https://youtu.be/4w0DEkGszi0

24. 黃金炒飯https://youtu.be/XTt8W-m9jso

25. 糯米雞https://youtu.be/ReJ1InQK1xU

26. 菠蘿炒飯https://youtu.be/XcJ3j5PzXO0

27. 大蝦球芝士脆麵https://youtu.be/fcCRBNVxpXs

28. 唔肥魯肉飯 https://youtu.be/e30xvbV6TOI

29. 揚州炒飯 80歲老師傅 教授https://youtu.be/2ju3MOXVgLM

30. 食上癮蠔油撈麵https://youtu.be/-jUgxM3PEJc

31. 爽口雲吞麵https://youtu.be/2w0SzprtuMk

32. 炒米粉 小秘訣 大重點https://youtu.be/qw-f51817xU

33. 鹹蛋白蝦米炒飯https://youtu.be/-7_AldrpEjg

34. 蠔油撈米 包你食上癮https://youtu.be/T0xwUOmzKzs

35. 瑤柱帶子燴飯https://youtu.be/4pZLvqs16nA

36.腩肉鹹魚香烏冬https://youtu.be/R_ZqNC_N4Rg

37.低糖醋米粉https://youtu.be/e36kD3bow_M

38. 鴨胸出前一丁https://youtu.be/Bu7Yo0jZaec

39. 港式鴛鴦飯https://youtu.be/e0JML_RNISo

40. 炸醬麵 秘訣公開https://youtu.be/Iz-q_d51qt8

41. 咁樣先係炒粉絲https://youtu.be/_DSx46PeNaI

42. 茶餐廳黑椒牛扒飯https://youtu.be/Dc4g4p_-mfM

43. 瓜粒湯飯https://youtu.be/HREjkb2OOsM

44. 懷舊狗仔粉https://youtu.be/-DLKxfiNLkI

45. 吞拿魚鮮茄長通粉https://youtu.be/xl7R1IBCqk8

46. 四色蔬菜麵 100%天然https://youtu.be/L7_SQDUJyr4

47. 茶餐廳 榨菜肉絲麵
https://youtu.be/2dCK2y8AiyY

48. 橡筋麵 大地魚粉 餛飩湯https://youtu.be/yHJW95t13Io

49. 一百個percent代替米飯 米通粉https://youtu.be/xs8Le01Losg

50. 鮮茄雞蛋 菠菜麵https://youtu.be/hnFRuIlpu5I

51. 星洲炒米 失傳 重現https://youtu.be/RsdZRKQpjxU

52.紅茄蛋刀削麵
https://youtu.be/UQI3_3YxAuM

53. 叉燒炒刀削麵https://youtu.be/sYlQONJDELc

54.鳳爪排骨糯米飯♨️https://youtu.be/18Ou5DPnYMc

55.金錢肚麵https://youtu.be/1hKkQYils5c

Braised Beef Honeycomb Tripes?Succulently Tender?Super Rich in Flavor?

炇金錢肚!
超淋滑超濃味!
Braised Beef Tripes

⬇️⬇️English recipe follows ⬇️⬇️
香煎斧頭扒：

材料：
斧頭牛扒1件

處理：
牛扒解凍後，用廚紙索乾牛扒上的水分。

烹調：
1. 大火燒熱鑊。
2. 放斧頭扒，每面煎1分鐘。
3. 一面煎了1分鐘，反轉牛扒再煎1分鐘。
4. 牛扒邊都要煎1分鐘。
5. 夾牛扒上碟，兩面掃勻雞蛋白。
6. 加入調味料：
a. 海鹽1茶匙
b. 黑胡椒1茶匙
c. 檸檬葉碎
搽勻牛扒。

預備焗爐：
1. 先預熱焗爐3分鐘。
2. 放一隻碟在焗爐內盛載油分。
3. 用“燒烤功能”，放牛扒在焗爐最高的一層，焗30分鐘。
4. 過了15分鐘，取出牛扒反轉，再焗餘下的15分鐘。
5. 又焗了另外的15分鐘，取出牛扒，放牛油1小塊在牛扒上。
6. 在牛扒上，鋪上錫紙，蓋住3分鐘。
7. 完成，可享用。

Pan-fried Tomahawk steak:

Ingredients:
Tomahawk steak 1 pc

Preparation:
Defrost the steak, dry it with kitchen towel.

Steps:
1. Heat up the wok at high flame.
2. Put Tomahawk steak in wok, fry for 1 minute.
3. Fry one side for a minute, then flip it over frying for another 1 minute.
4. Fry the edge of the steak for a minute as well.
5. Put the steak on plate. Brush egg white on both sides of it.
6. Add seasonings:
a. Sea salt 1 tsp
b. Black pepper 1 tsp
c. Fragrant coleus crumbs
Brush all over the steak.

Get ready for an oven:
1. Preheat the oven for 3 minutes.
2. Put a plate at the bottom inside the oven.
3. Use "barbecue function", put the steak at the top inside the oven. Bake for 30 minutes.
4. Fifteen minutes later, take out the steak and flip it over. Bake for the rest of 15 minutes.
5. Have been baked for another 15 minutes. Take out the steak, brush a small cube of butter on it.
6. Put an aluminum foil on steak. Cover it for 3 minutes.
7. Complete. Serve.

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