This repo is very large. Before cloning, please follow the instructions below in "Downloading Files" to avoid downloading unnecessary data.
To download the large .r1cs, .ptau, and .zkey files in this repo, install git-lfs.
Then run the following commands to clone the repo without the larger files:
GIT_LFS_SKIP_SMUDGE=1 git clone https://github.com/aptos-labs/aptos-keyless-trusted-setup-contributions-may-2024
cd aptos-keyless-trusted-setup-contributions-may-2024
To get a specific file <filename>, run
git lfs pull --include "<filename>"
If needed, install npm, and also install nvm. Then run the commands
nvm use 18
and
npm install [email protected]
to install the version of snarkjs used by our code which was used to run the setup ceremony.
To verify the hash values of various files presented in this document, ensure Homebrew is installed and run
brew install b2sum
The b2sum hash of a file may be computed by running b2sum <filename>.
The powers of tau file used was downloaded from one of the links provided here in the Snarkjs README, as the file titled powersOfTau28_hez_final_21.ptau. This .ptau file contains 54 contributions and a random beacon. Its b2sum hash is
9aef0573cef4ded9c4a75f148709056bf989f80dad96876aadeb6f1c6d062391f07a394a9e756d16f7eb233198d5b69407cca44594c763ab4a5b67ae73254678
To verify this file, run
npx [email protected] powersoftau verify powersOfTau28_hez_final_21.ptau -v
To reproduce main.r1cs, clone the Aptos Core Repo, checkout commit 39f9c44b4342ed5e6941fae36cf6c87c52b1e17f, and run the following commands:
cd keyless/circuit-data/templates
circom -l . main.circom --r1cs
The b2sum hash of the resulting main.r1cs file should be
9e9bb596c7a453521e9b8df1dbd82c0bad5788f2679f8c53a6bc6112b9ec6061fea36547efa649ba9af78f6792ecd639a654ea6a1d11553b1ce93998924b3ac2
which is identical to the b2sum hash of main_39f9c44b4342ed5e6941fae36cf6c87c52b1e17f.r1cs in this repo.
This provides a link between our circuit code and the trusted setup, ensuring you can verify the setup was done over the correct codebase. Without this link, you could not know what circuit the setup was done over, making it potentially insecure.
To reproduce the initial .zkey file, run the command
npx [email protected] groth16 setup main.r1cs ./powersOfTau28_hez_final_21.ptau initial.zkey -v
The b2sum hash of the resulting .zkey file should match that of contributions/main_00000.zkey. This hash value is
8381954aa98bc7c7e11fd1f74f544320937f291fd1ce83cfc2a227c805b69de5362781c2484b125c600591cb54a34da56c0911f9a0fea066636f5c79ddbcc3c4
The folder contributions contains all .zkey files output by the Aptos OIDB trusted setup. Each .zkey file corresponds to the contribution of one participant, in the order of their having participated, so that i.e. main_00004.zkey corresponds to the output of the contribution made by the 4-th participant to have completed their contribution.
Each contribution may be verified by running the command
npx [email protected] zkey verify main.r1cs powersOfTau28_hez_final_21.ptau contributions/<contribution_filename>.zkey -v
Depending on your machine, this command can take upwards of 20 minutes. Upon completion, it will produce an output of the following form:
[INFO] snarkJS: Circuit Hash:
0a9aeb1f 247e8652 46a00128 ab2fbe10
86ad8f2a 86a17f72 bd35f095 dfde1a86
646f6faa fdaa46d6 9dde1ad5 88f21d4d
0d4e9e74 519b561d 9e71e768 9c739b68
[INFO] snarkJS: -------------------------
[INFO] snarkJS: contribution #3 sherry-x-55457892:
0125c8cb de936779 25ff1b62 49eff731
15a68679 899678bb 83a19c0e cf8daf28
20dcf4a9 78192394 2895cbc0 1ba661b3
1628f395 f553b409 16428355 cfd53f6b
[INFO] snarkJS: -------------------------
[INFO] snarkJS: contribution #2 michaelaptos-158355435:
63c5d60f 668bd588 d6c86d0e a459f24d
d75c207a 76dbc07a 36c466c5 97ef3ba7
760e6dd3 b3162767 313935eb afe8fd59
1b4868b0 238ee70c beb60e3b a46a38d6
[INFO] snarkJS: -------------------------
[INFO] snarkJS: contribution #1 alinush-1724810:
65c3e44a e8ae9dcd 2406d1b4 7413e09c
72a6587b 5dbc6e00 ac607c84 cefbc4c1
a9dd4d2c 39d78381 ea2a8cf2 8d3f4e91
c32c2e8b eaf17465 b9bc8045 a529ecf1
[INFO] snarkJS: -------------------------
[INFO] snarkJS: ZKey Ok!
This is a list of all contribution hashes up to and including the current contribution that you have just verified. If you participated in the setup, you can verify that your contribution is being used correctly by running this command on the final .zkey file, contributions/main_final.zkey, and comparing the output contribution hash corresponding to your contribution to the one which was printed out when you finished contributing during the ceremony.
This may be done with the following command:
npx [email protected] zkey verify main.r1cs powersOfTau28_hez_final_21.ptau contributions/main_final.zkey -v
Note that the contribution hash is not simply a hash of the .zkey file, but a hash of the participant-specific parameters stored by every .zkey file after a participant's contribution has been made. Verification on the i-th .zkey file includes checks on these parameters for participants 1 through i. The output of this process is used in verifying the .zkey file overall when running the above zkey verify command.
To eliminate potential bias, we apply the Drand randomness beacon to the final .zkey file to obtain our final .zkey file for use in production. To regenerate our randomness, first follow the instructions here and then run
./drand-client --round 3977904 \
--chain-hash 8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce \
--url http://api.drand.sh \
--relay /dnsaddr/api.drand.sh
which should output round number 3977904 and randomness
897783163d9f6d305b57b5a47e856a31cd6ee33c9dc8d56d0a59579def57558a
You can recreate the final .zkey file by running
npx [email protected] zkey beacon contributions/main_00141.zkey main_final.zkey da44fdb1c88a25fd68d8581e077dd9e4d6d4c8af22c30b127a23dd8343995565 10 -v
This command may take 10-15 minutes. It should output
[INFO] snarkJS: Contribution Hash:
fe2a67c9 267a89ac 401e1e0c f6967df5
84f10fcd 07f49b71 cd204771 f7eff35f
f60bc605 195b1912 0b698f0b 15b4247e
84188144 2c7bd57a 9143de22 430379cd
As with other contributions, this .zkey file may be verified by running
npx [email protected] zkey verify main.r1cs powersOfTau28_hez_final_21.ptau main_final.zkey -v
The b2sum hash of the resulting main_final.zkey should be
07ee7c4de536efe9866a351001698ffdd2bd377b148bec67e4adadd1bb1d3e09ce7b2f07e68ba207f339e4ee8e44335f9c2c574c07d51aa0283dcc8cb65ad992
which is identical to the b2sum hash of contributions/main_final.zkey.
The final verification key can be exported using
npx [email protected] zkey export verificationkey contributions/main_final.zkey verification_key_regen.vkey
Its b2sum hash is
57e3e3f7f9a43566b64eef59b8ce868b3c55c12c6ee0b52660006067bbe98c51d20644334d8ae587f54736f6a8b81a539b23017b0abeb3d03046d893faaa691b
This should be identical to the verification_key.vkey file already in the repo.
The list of participants who both completed their contribution and consented to have their identity listed are presented below. We would like to sincerely thank both them and those who have chosen to remain anonymous for contributing to the security of Aptos Keyless.
Daniel Porteous (dport)
Maykon Michel Palma
Max Kaplan
Rasa Welcher
Greg Nazario
Rustie Lin
Rati Gelashvili
zhoujunma
Sherry Xiao
Maayan
Michael Straka
None
Zekun Li
Alyssa Ponzo
Artsiom Holikau
Philip Vu
Eric Carlson
darren
schultzie
Gabriele Della Casa Venturelli
None
John Youngseok Yang
Alin Tomescu
Avery Ching
Oliver He
Kobi Gurkan
jill
Angie Huang
Rex Fernando
Aleks Zi
