@darkforest_eth/snarks

This package contains .wasm compiled SNARK circuits and .zkey proving/verifier keys for the Dark Forest SNARKs. It also contains typescript types for inputs and outputs to the SnarkJS functions we use to calculate Dark Forest SNARK proofs, as well as conversion methods that convert between SnarkJS outputs and Dark Forest contract call args.

Installation

You can install this package using npm or yarn by running:

npm install --save @darkforest_eth/snarks

yarn add @darkforest_eth/snarks

When using this in a plugin, you might want to load it with skypack

import * as snarks from 'http://cdn.skypack.dev/@darkforest_eth/snarks';

Table of contents

Interfaces

• BiomebaseSnarkInput
• InitSnarkInput
• MoveSnarkInput
• RevealSnarkInput
• SnarkJSProof
• SnarkJSProofAndSignals
• WhitelistSnarkInput

Type aliases

• BiomebaseSnarkContractCallArgs
• ContractCallArgs
• InitSnarkContractCallArgs
• MoveSnarkContractCallArgs
• RevealSnarkContractCallArgs
• WhitelistSnarkContractCallArgs

Functions

• buildContractCallArgs

Type aliases

BiomebaseSnarkContractCallArgs

Ƭ BiomebaseSnarkContractCallArgs: [[string, string], [[string, string], [string, string]], [string, string], [string, string, string, string, string, string, string]]

Shape of the args for findArtifact DarkForest contract call.

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ContractCallArgs

Ƭ ContractCallArgs: RevealSnarkContractCallArgs | InitSnarkContractCallArgs | MoveSnarkContractCallArgs | BiomebaseSnarkContractCallArgs | WhitelistSnarkContractCallArgs

Type representing the shape of args that are passed into DarkForest functions that require zkSNARK verification.

---

InitSnarkContractCallArgs

Ƭ InitSnarkContractCallArgs: [[string, string], [[string, string], [string, string]], [string, string], [string, string, string, string, string, string, string, string]]

Shape of the args for the initializePlayer DarkForest contract call

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MoveSnarkContractCallArgs

Ƭ MoveSnarkContractCallArgs: [[string, string], [[string, string], [string, string]], [string, string], [string, string, string, string, string, string, string, string, string, string]]

(Almost) shape of the args for move DarkForest contract call. The fourth array element additionally needs shipsMoved, silverMoved, and artifactIdMoved before it can be passed as args to move, but those values are not part of the zkSNARK.

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RevealSnarkContractCallArgs

Ƭ RevealSnarkContractCallArgs: [[string, string], [[string, string], [string, string]], [string, string], [string, string, string, string, string, string, string, string, string]]

Shape of the args for revealLocation DarkForest contract call

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WhitelistSnarkContractCallArgs

Ƭ WhitelistSnarkContractCallArgs: [[string, string], [[string, string], [string, string]], [string, string], [string, string]]

Shape of the args for whitelistRegister DarkForest contract call.

Functions

buildContractCallArgs

▸ buildContractCallArgs(snarkProof, publicSignals): ContractCallArgs

Method for converting the output of snarkJS fullProve into args that can be passed into DarkForest smart contract functions which perform zk proof verification.

Parameters

Name	Type	Description
snarkProof	SnarkJSProof	the SNARK proof
publicSignals	string[]	the circuit's public signals (i.e. output signals and public input signals)

Returns

ContractCallArgs