Practical overview
When it fits
Use it when a development project needs documented smart-contract and TypeScript building blocks for ERC20 trading, DeFi position queries or multi-protocol integration.
Who it is for
- Developers building Ethereum or L2 DeFi applications.
- Teams creating portfolio, transaction or protocol-integration interfaces.
- Engineers extending the system with read-only or interactive adapters.
Documented uses
- Execute ERC20 swaps through a Router contract.
- Query user assets and debt deposited in supported DeFi protocols.
- Inspect the underlying components of complex derivative ERC20 tokens.
- Connect an application to several DeFi protocols through a unified integration layer.
- Add custom adapters for additional protocol interactions.
Requirements & limits
The repository is publicly visible and released under the GNU LGPLv3 license. The available material does not specify account, pricing or service-availability requirements.
- The documented trading layer supports fixed-input and fixed-output swaps, token permit variants and relayed transactions using EIP712 signatures.
- Protocol and marketplace fees are part of the documented Router trading model.
- Adding adapters is supported, but the available material does not expose the concrete adapter API or runtime requirements.
- Deployment uses Truffle Dashboard, while testing and contract development use Hardhat-related project tooling.
- Block-explorer verification requires the relevant API key in
.env.
Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.
Install the DeFi SDK development dependencies
Prepare the repository for its documented development commands.
Before you start
- A local checkout of the public repository.
- npm available in the development environment.
Steps
Run the command below to install the project dependencies.
npm installUse the documented npm scripts for testing, coverage, linting or serving the documentation.
Expected outcome
The project dependencies are installed and the repository’s documented development workflows are available.
Guide limitations
- This setup recipe does not establish that a particular runtime, network or application integration will work.
- The available instructions do not specify a version requirement for npm or the surrounding environment.
Prepare a Router deployment through Truffle Dashboard
Follow the repository’s documented preparation and deployment sequence for the Router contract.
Before you start
- The repository and its dependencies installed.
- Truffle Dashboard available for the documented workflow.
- A browser for signing the deployment transaction.
- A fee beneficiary configured for the chosen network in
scripts/deployment.js.
Steps
Run the command below to start Truffle Dashboard.
npm run truffle-dashboardRun the command below.
npm run deploy:router:truffle-dashboardSign the deployment transaction in the browser at
http://localhost:24012/.Put the newly deployed contract address into
scripts/deployment.js.Run the documented Router initialization command after configuring the fee beneficiary.
Expected outcome
The documented workflow prepares a Router deployment and provides the address needed for initialization.
Guide limitations
- The instructions do not identify a network, wallet, transaction cost or deployment success guarantee.
- Contract verification is a separate step and requires the relevant block-explorer API key in
.env.
Sources & review
Source record details
- Source availability
- Active
- Sources checked
- 2 October 2026
- Original website title
- zeriontech/defi-sdk · Official homepage title · retained in its source language