AZTEC-基于ethereum的隐私交易-II-发布至Ganache

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项目进展

AZTEC目前已经在 ethereum mainnet 上线PoC，应用于 DAI 与 AZTEC Token 的转换，即从 DAI 的明文 ERC20 到密文 AZTEC note 的转换。

目前 AZTEC 也可以实现独立密文 Token 的发布和使用，完全基于密文的 Join Split 交易证明。

目前如果是 2 个输入note，2 个输出note，保密交易的情况下，在 ethereum 的 gas 消耗大概是 900,000gas。如果 EIP1108 上线了的话，gas 消耗大约在 200,000 — 300,000gas 之间。

示例项目 step by step 发布至 Ganache

1.下载，git clone https://github.com/AztecProtocol/aztec-ganache-starter-kit.git

2.安装，cd aztec-ganache-starter-kit && yarn install

3.复制 account 环境，cp RENAME_ME.env .env

4.通过 **package.json **的 script，配合.env 中的 account 配置，启动 Ganache，yarn start

5.通过 **package.json **的 script，按照 truffle-config.js 中的内容，配合migrations中的发布文件，编译合约并发布至 Ganache，yarn migrate

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➜  aztec-ganache-starter-kit git:(master) ✗ yarn migrate
yarn run v1.16.0
$ truffle compile --all && truffle migrate --reset

Compiling your contracts...
===========================
> Compiling ./contracts/AceContracts.sol
> Compiling ./contracts/Migrations.sol
> Compiling ./contracts/TestERC20.sol
> Compiling @aztec/protocol/contracts/ACE/ACE.sol
> Compiling @aztec/protocol/contracts/ACE/NoteRegistry.sol
> Compiling @aztec/protocol/contracts/ACE/validators/adjustSupply/AdjustSupply.sol
> Compiling @aztec/protocol/contracts/ACE/validators/adjustSupply/AdjustSupplyABIEncoder.sol
> Compiling @aztec/protocol/contracts/ACE/validators/bilateralSwap/BilateralSwap.sol
> Compiling @aztec/protocol/contracts/ACE/validators/bilateralSwap/BilateralSwapABIEncoder.sol
> Compiling @aztec/protocol/contracts/ACE/validators/dividendComputation/DividendComputation.sol
> Compiling @aztec/protocol/contracts/ACE/validators/dividendComputation/DividendComputationABIEncoder.sol
> Compiling @aztec/protocol/contracts/ACE/validators/joinSplit/JoinSplit.sol
> Compiling @aztec/protocol/contracts/ACE/validators/joinSplit/JoinSplitABIEncoder.sol
> Compiling @aztec/protocol/contracts/ACE/validators/privateRange/PrivateRange.sol
> Compiling @aztec/protocol/contracts/ACE/validators/privateRange/PrivateRangeABIEncoder.sol
> Compiling @aztec/protocol/contracts/ERC1724/ZkAsset.sol
> Compiling @aztec/protocol/contracts/ERC1724/ZkAssetMintable.sol
> Compiling @aztec/protocol/contracts/ERC1724/ZkAssetOwnable.sol
> Compiling @aztec/protocol/contracts/ERC20/ERC20Mintable.sol
> Compiling @aztec/protocol/contracts/interfaces/AdjustSupplyInterface.sol
> Compiling @aztec/protocol/contracts/interfaces/DividendComputationInterface.sol
> Compiling @aztec/protocol/contracts/interfaces/IAZTEC.sol
> Compiling @aztec/protocol/contracts/interfaces/IZkAsset.sol
> Compiling @aztec/protocol/contracts/interfaces/JoinSplitInterface.sol
> Compiling @aztec/protocol/contracts/interfaces/PrivateRangeInterface.sol
> Compiling @aztec/protocol/contracts/libs/LibEIP712.sol
> Compiling @aztec/protocol/contracts/libs/NoteUtils.sol
> Compiling @aztec/protocol/contracts/libs/ProofUtils.sol
> Compiling @aztec/protocol/contracts/libs/SafeMath8.sol
> Compiling openzeppelin-solidity/contracts/math/SafeMath.sol
> Compiling openzeppelin-solidity/contracts/ownership/Ownable.sol
> Compiling openzeppelin-solidity/contracts/token/ERC20/ERC20.sol
> Compiling openzeppelin-solidity/contracts/token/ERC20/IERC20.sol
> Artifacts written to /home/user/Documents/Aztec/aztec-ganache-starter-kit/build/contracts
> Compiled successfully using:
   - solc: 0.5.4+commit.9549d8ff.Emscripten.clang


Compiling your contracts...
===========================
> Everything is up to date, there is nothing to compile.


Starting migrations...
======================
> Network name:    'development'
> Network id:      1564378609369
> Block gas limit: 0x6691b7



1_initial_migration.js
======================

   Deploying 'Migrations'
   ----------------------
   > transaction hash:    0x6d94779d277c1f3f02ae8bf1e86ca9c62866f308ccd0834347233d2522ac2306
   > Blocks: 0            Seconds: 0
   > contract address:    0x31bA6208D85a545C75186c51d0F36B1498Fd70bB
   > block number:        1
   > block timestamp:     1564379036
   > account:             0x909E433c507A398a5405677B5b2767a3f523F73b
   > balance:             999.99580786
   > gas used:            209607
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.00419214 ETH

 

   > Saving migration to chain.
   > Saving artifacts
   -------------------------------------
   > Total cost:          0.00419214 ETH


 

2_ace.js
========


   Deploying 'ACE'
   ---------------
   > transaction hash:    0x249b155829f8a7c069009129d008751e8c6547d39e54b961cb07d80beec13c29
   > Blocks: 0            Seconds: 0
   > contract address:    0x7BeDb6777e6fFe535Fc444217A80edf349DB8623
   > block number:        3
   > block timestamp:     1564379036
   > account:             0x909E433c507A398a5405677B5b2767a3f523F73b
   > balance:             999.9273801
   > gas used:            3379461
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.06758922 ETH

 

   Deploying 'AdjustSupply'
   ------------------------
   > transaction hash:    0xc8c52025eb50204fee60bc65cdb7b7abc09345abff8264e0f88b3f4ec80c54f5
   > Blocks: 0            Seconds: 0
   > contract address:    0x817888dC24398DEE4A53AB6b247b58C3B22F862c
   > block number:        4
   > block timestamp:     1564379037
   > account:             0x909E433c507A398a5405677B5b2767a3f523F73b
   > balance:             999.9142172
   > gas used:            658145
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.0131629 ETH

 
 

   Deploying 'BilateralSwap'
   -------------------------
   > transaction hash:    0xebc929146741026593580155d9d19844c96f65877eb48faa6e43bad2da812db5
   > Blocks: 0            Seconds: 0
   > contract address:    0xcD53E73dADB6eaD307892C0aBe0bfE5B2f8f570F
   > block number:        5
   > block timestamp:     1564379037
   > account:             0x909E433c507A398a5405677B5b2767a3f523F73b
   > balance:             999.9055876
   > gas used:            431480
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.0086296 ETH

 
 
   Deploying 'JoinSplit'
   ---------------------
   > transaction hash:    0x1fa8ac853d1f6c9306418c07e50f85e3fee1a759ccbe79fa5b035fac0083b00c
   > Blocks: 0            Seconds: 0
   > contract address:    0x77c76635fdBE43afECa6A12cE8588010Ea6f2E02
   > block number:        6
   > block timestamp:     1564379037
   > account:             0x909E433c507A398a5405677B5b2767a3f523F73b
   > balance:             999.8929998
   > gas used:            629390
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.0125878 ETH



   Deploying 'PrivateRange'
   ------------------------
   > transaction hash:    0x5820bd16d8f9b725f2dcfe965dd7d8dd20e80a763ef1a8e7c2a98c35040d05b0
   > Blocks: 0            Seconds: 0
   > contract address:    0xe052a2Ab6b49af87265e7d4b245B0AbFE470865b
   > block number:        7
   > block timestamp:     1564379037
   > account:             0x909E433c507A398a5405677B5b2767a3f523F73b
   > balance:             999.88160816
   > gas used:            569582
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.01139164 ETH

 

   Deploying 'DividendComputation'
   -------------------------------
   > transaction hash:    0x6154f1716037db818d98ce0293c6370b84fca6977863ce90a5f736451dca4c68
   > Blocks: 0            Seconds: 0
   > contract address:    0x36cBFA4f87a3771E92D51F41fa0E32d5Ca65f340
   > block number:        8
   > block timestamp:     1564379038
   > account:             0x909E433c507A398a5405677B5b2767a3f523F73b
   > balance:             999.86990106
   > gas used:            585355
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.0117071 ETH


 

   > Saving migration to chain.
   > Saving artifacts
   -------------------------------------
   > Total cost:          0.12506826 ETH

 


3_ZkAsset.js
============


   Deploying 'TestERC20'
   ---------------------
   > transaction hash:    0x166f81eec89ffc816f12dbcb05a581194125df3ab191fc8025c425cd641509e2
   > Blocks: 0            Seconds: 0
   > contract address:    0x1fE2f08A5D69e6A886B349bd8c26407C0e3Ef89d
   > block number:        16
   > block timestamp:     1564379039
   > account:             0x909E433c507A398a5405677B5b2767a3f523F73b
   > balance:             999.84888398
   > gas used:            629044
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.01258088 ETH

 

   Deploying 'ZkAsset'
   -------------------
   > transaction hash:    0xba9cbfe6a1c5de0126ff7152f12b0b72812c652ad63daa6604bcefd186180a96
   > Blocks: 0            Seconds: 0
   > contract address:    0x8B02C67c7175a48e1aBA3067b5F5eEA29a051ECd
   > block number:        17
   > block timestamp:     1564379039
   > account:             0x909E433c507A398a5405677B5b2767a3f523F73b
   > balance:             999.81309922
   > gas used:            1789238
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.03578476 ETH

 

   Deploying 'ZkAssetMintable'
   ---------------------------
   > transaction hash:    0xd8d3c7e33af3e7ec5dfdb8e3a0ee5d3928b884011d87035443ab229f5c7a4502
   > Blocks: 0            Seconds: 0
   > contract address:    0x2E63304e1F9f6AD963540A05D3f385426957A2C7
   > block number:        18
   > block timestamp:     1564379040
   > account:             0x909E433c507A398a5405677B5b2767a3f523F73b
   > balance:             999.76265604
   > gas used:            2522159
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.05044318 ETH


   > Saving migration to chain.
   > Saving artifacts
   -------------------------------------
   > Total cost:          0.09880882 ETH

 

Summary
=======
> Total deployments:   10
> Final cost:          0.22806922 ETH


Done in 41.03s.

第一步 1_initial_migration.js

第二步 2_ace.js。发布 ACE，setCommonReferenceString 方法建立零知识系统的配置文档

await aceContract.setCommonReferenceString(constants.CRS);

通过 ACE 的setProof(proofId, address)方法来设定各个执行证明的合约地址。proofId 为 proof 的类别，从@aztec/dev-utils里面取得定义。address为发布的合约地址

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await aceContract.setProof(MINT_PROOF, AdjustSupply.address);
await aceContract.setProof(BILATERAL_SWAP_PROOF, BilateralSwap.address);
await aceContract.setProof(DIVIDEND_PROOF, DividendComputation.address);
await aceContract.setProof(JOIN_SPLIT_PROOF, JoinSplit.address);
await aceContract.setProof(PRIVATE_RANGE_PROOF, PrivateRange.address);

第三步 3_ZkAsset.js。发布零知识资产（ZkAsset）

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// initialise the ZkAsset with an equivilant
await deployer.deploy(
  ZkAsset,
  aceContract.address,
  TestERC20.address,
  1,
  false,
  true
);

此处共计 5 个参数：

1.aceAddress — ACE 的合约地址；

2.linkedTokenAddress — 零知识资产所代表的公开的 ERC20 Token 的合约地址，如不代表特定 Token 则可设定为 address(0)；

3.scalingFactor — 是表示与代表的 ERC20 Token 的转换比例，此处为 1:1 转换；

4.canAdjustSupply — owner 是否可以修改 note 的 totalSupply；

5.canConvert — 是否可以将保密 note 转换回到公开的 ERC20 Token

测试

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➜  aztec-ganache-starter-kit git:(master) ✗ truffle test
Using network 'development'.
 

Compiling your contracts...
===========================
\> Everything is up to date, there is nothing to compile.
  

  Contract: PrivateVenmo
Bob wants to deposit 100
Bob succesffully deposited 190
Bob takes a taxi, Sally is the driver
The fare comes to 25
Bob paid sally 25 for the taxi and gets 75 back
​    ✓ Bob should be able to deposit 100 then pay sally 25 by splitting notes he owns (5861ms)
 

  1 passing (6s)

测试程序位于test文件夹内。