解读 DAI 架构流程图 —— 晦涩难懂的术语

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本文详细讲述了Maker协议中的各种术语及其相关合约接口的说明，让读者逐步明白其中的奥秘。同时，介绍了DAI的诞生背景，以及Maker晦涩难懂的代码是刻意的。文章列举了大量术语，包括Cat、Dai、End、Flipper、Flapper、Flopper等等

免责声明：本文不构成投资建议，仅研究技术为主，祝玩得开心 ^_^

上一节回顾

上个章节主要讲解了 Maker 协议的介绍，同时在最后贴了两张图，一张是 Maker 协议智能合约模块系统图，另一张是 Maker 101 协议交互图。细心的读者可能会发现，合约模块的图异常复杂，而且上面的单词背后的意义可能并未完全理解。不用担心，本文将会详细讲述这些术语以及相关合约接口的说明，让你逐步明白其中的奥秘。

DAI 诞生于以太坊测试网发布前

在在讲解这些术语之前，我们先来了解一下 DAI 的诞生背景。DAI 的最早雏形诞生于 2015 年 3 月，这个时间点比以太坊测试网的正式发布还要早两个月。创始人 Rune 在 Reddit 上与以太坊社区的成员，包括 Vitalik 分享了协议的设计、合约代码以及测试前端。

Maker 晦涩难懂的代码是刻意的

乍一看，这些术语确实令人费解，许多研究 Maker 协议的开发者常常惊讶于其复杂且几乎晦涩的术语。实际上，这种复杂性是有意为之。变量名不同的字母长度和词性，严格而清晰地对应着不同的方程和模块。

架构流程图

MakerActions

术语介绍

Cat - Liquidator

  • Bite - Trigger liquidation of an unsafe Cdp (vat.grab)

Dai - Token

  • Mint - Mint to an address
  • Burn - Burn at an address
  • Push - Transfer
  • Pull - Transfer From
  • Move - Transfer From
  • Approve - Allow pulls and moves
  • Permit - Approve by signature

End - Global settlement

  • Cage - Freeze user-facing actions. Tag Ilk prices.
  • Skim - Settle a Cdp at the tagged price
  • Free - Remove collateral from a settled Cdp
  • Thaw - Fix outstanding Dai supply after all Skims
  • Flow - Calculate final Ilk prices
  • Pack - Lock Dai ahead of Cash
  • Cash - Exchange packed Dai for collateral

Flipper - Collateral auctions

  • Kick - Put up a new GEM lot for auction
  • Tick - Bump the end date for an auction with no bids
  • Tend - Submit a DAI bid (increasing bid)
  • Dent - Submit a DAI bid (decreasing lot)
  • Deal - Settle a completed auction

Flapper - Surplus auctions

  • Kick - Put up a new DAI lot for auction
  • Tend - Submit an MKR bid (increasing bid)
  • Deal - Settle a completed auction

Flopper - Defecit auctions

  • Kick - Put up a new MKR bid for auction
  • Dent - Submit a DAI bid (decreasing lot)
  • Deal - Settle a completed auction

Join - Token adapters

  • Join - Deposit tokens to the system
  • Exit - Remove tokens from the system

Jug - Stability fees

  • Drip - Trigger stability fee accumulation (vat.fold)

Median - Price oracle

  • Read - Get valid price or fail
  • Peek - Get price and validity
  • Poke - Set price from white-listed feed providers

OSM - Oracle security module

  • Read - Get current valid price or fail
  • Peek - Get current price and validity
  • Peep - Get next price and validity
  • Poke - Set next price if delay has elapsed

Pause - System governance

  • Plot - Schedule a plan
  • Exec - Execute a plan
  • Drop - Cancel a plan

Pot - Dai savings

  • Join - Add Dai to the Pot
  • Exit - Remove Dai from the Pot
  • Drip - Trigger savings accumulation (vat.suck)

Spotter - Price relayer

  • Poke - Update the spot price for a given Ilk (vat.file)

Vat - User balances

  • Hope - Permit flux and move
  • Nope - Deny flux and move
  • Slip - Add and remove Gem
  • Move - Transfer Dai
  • Flux - Transfer Gem
  • Frob - Cdp Management
  • Fork - Transfer Cdp balances
  • Grab - Seize Cdp balances
  • Heal - Balance system surplus/defecit
  • Suck - Print Dai
  • Fold - Apply rates across an Ilk

Vow - Liquidations manager

  • Fess - Push bad debt to the auctions queue
  • Flog - Release queued debt for auction
  • Heal - Optimise debt buffer (vat.heal)
  • Kiss - Release on-auction debt and Heal (vat.heal)
  • Flap - Trigger a surplus auction (flapper.kick)
  • Flop - Trigger a defecit auction (flopper.kick)

参考资料