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@essential-dapps/signer

v0.0.1-beta.21

Published

@nfight/signer offers an ethers-based `Signer` for implementing nFight's meta-transaction stack in your dapp.

Downloads

22

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Maintainers

sammybauchsammybauch

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Readme

@nfight/signer

@nfight/signer offers an ethers-based Signer for implementing nFight's meta-transaction stack in your dapp.

Features

Provide an EssentialSigner to an ethers Contract or wagmi contract hook and user transactions will seamlessly become meta-transactions.

  • Cross-chain NFT auth: pass an NFT's chainId, contractAddress and tokenId to Contract calls - CCTG authorizes ownership and forwards this data to your L2 contract for building cross-chain experiences without bridging.

  • Network Agnostic UX: EssentialSigner lets users sign meta-transactions with their Ethereum wallet from any network - no network switching or L2 gas tokens needed.

  • Burner Wallets: nFight supports localized on-chain delegation for NFT auth. Pass a burner Wallet to EssentialSigner so users sign meta-transactions without a popup, while your L2 contract receives the primary address as the _msgSender().

  • Simple Integration: EssentialSigner is based on ethers, written in typescript and can be used in testing environments like hardhat.

Installation

The package is available via NPM:

  yarn install @nfight/signer

Usage

The SDK expects you to set some ENV vars in your dApp's environment:

NFIGHT_CHAIN_ID

The chain ID value for the chain where your implementation contract lives. 0xEssential currently supports Polygon's Mumbai testnet (80001) and Matic mainnet (137).

NFIGHT_RELAYER_URI

The SDK will handle submitting meta-transaction requests to your relayer. To do so the SDK needs to know the URI of the relaying service. This can be a fully qualified URL or a relative path.

nFight provides an OpenZeppelin Defender autotask that can be used as your relayer, but we recommend proxying the call to your autotask webhook to keep the URL secret.