Unizen Product Documentation
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Before you get started

Good to know
For security reasons, our API does not return contract addresses. Instead, you can obtain Trade Aggregator addresses using either of the following methods:
  1. 1.
    Install the npm package: https://www.npmjs.com/package/@unizen-io/unizen-contract-addresses and use the JSON file from @unizen-io/unizen-contract-addresses/production.json
  2. 2.
    Configure the JSON file provided below for your project.
"v1": {
"ethereum": "0xd3f64BAa732061F8B3626ee44bab354f854877AC",
"bsc": "0x880E0cE34F48c0cbC68BF3E745F17175BA8c650e",
"polygon": "0x07d0ac7671D4242858D0cebcd34ec03907685947",
"avax": "0x1C7F7e0258c81CF41bcEa31ea4bB5191914Bf7D7",
"fantom": "0xBE2A77399Cde40EfbBc4e89207332c4a4079c83D",
"arbitrum": "0x1C7F7e0258c81CF41bcEa31ea4bB5191914Bf7D7",
"optimism": "0xad1D43efCF92133A9a0f33e5936F5ca10f2b012E",
"base": "0x4F68248ecB782647D1E5981a181bBe1bfFee1040"
"v2": {
"ethereum": "0xf140bE1825520F773Ff0F469786FCA65c876885f",
"bsc": "0x12067e4473a1f00e58fa24e38e2cf3e53e21a33d",
"polygon": "0x85f8fb7ac814d0a6a0b16bc207df5bbc631f1ca6",
"avax": "0x468ae09BD4c8B4D9f7601e37B6c061776FeCFE3B",
"fantom": "0xD38559966E53B651794aD4df6DDc190d2235180E",
"arbitrum": "0x9660b95fcDBA4B0f5917C47b703179E03a28bf27",
"optimism": "0x3ce6e87922e62fc279152c841102eb2bf5497010"
This file contains the addresses of our production contracts. The version, indicated by "v1" or "v2", corresponds to the trade and can be obtained from the quote data of the respective trade using the /quote API.

How to set fixed fees

Third parties who integrate to Unizen through the Unizen Trade SDK can choose to charge a fee to their users. The SDK agreement with each third party will stipulate the following:
Important! The intended fee is to be communicated to the Unizen Team that will proceed to upgrade their smart contracts to reflect the integrators requested trading fee.
  1. 1.
    If the trading fee charged is greater than 0.5%, then Unizen will charge (retain) a fixed portion of that fee. No further fee will be charged by Unizen based on slippage, whether it is positive or negative.
  2. 2.
    If the trading fee charged is less than or equal to 0.5% then Unizen will retain 50% of any positive slippage and the third-party can allocate the remaining 50% as they see fit. There is no fee charged by Unizen for negative slippage.