# SDK integration ### SDK integration {% hint style="info" %} SDK a basic understanding of Javascript/Typescript and installed Web3. {% endhint %} You can easily install the SDK using the command: ``` // with npm npm install bridgemuual // or with yarn yarn add bridgemutual ``` **Purchase policy** ``` import {_getWhitelistedContracts, getCoverageApprove, provideCoverage} from 'bridgemutual'; //returnts list of whitelisted contracts param {Object} web3 - instance of web3 param {Boolean} isTest - for use Rinkeby TestNet _getWhitelistedContracts(web3, isTest).then(policies => { //policies <== list of policies }) //returns approved contract param {Number} id - Id of policy param {Object} web3 - instance of web3 param {Number} weeks - period of policy param {Number} amount - amount of policy param {String} userAddress - user address (in ETH) getApprove(id, web3, weeks, amount, userAddress).then(approvedContract => { //approvedContract <== list of policies }) //returns policy price param {String} userAddress - user address (in ETH) param {Number} id - Id of policy param {Number} amount - amount of policy param {Number} weeks - period of policy param {Object} web3 - instance of web3 getPolicyPrice(userAddress, id, amount, weeks, web3).then(policyPrice => { //policyPrice <== policy price in USDT }) //returns current allowance param {Object} web3 - instance of web3 param {String} userAddress - user address (in ETH) param {Number} id - Id of policy param {Boolean} isTest - for use Rinkeby TestNet getAllowance (web3, userAddress, id, isTest).then(currentAllowance => { //currentAllowance <== current allowance }) //returns current allowance param {Object} web3 - instance of web3 param {String} userAddress - user address (in ETH) param {Number} id - Id of policy param {Boolean} isTest - for use Rinkeby TestNet resetAllowance(web3, userAddress, id, isTest).then(currentAllowance => { //currentAllowance <== current allowance equal 0 }) //returns current allowance param {Object} web3 - instance of web3 param {String} userAddress - user address (in ETH) param {Number} id - Id of policy param {Number} policyPrice - from getPolicyPrice method param {Boolean} isTest - for use Rinkeby TestNet setAllowance (web3, userAddress, id, policyPrice, isTest).then(currentAllowance => { //currentAllowance <== current allowance }) //returns policy purchase result param {Number} id - Id of policy param {Object} web3 - instance of web3 param {String} userAddress - user address (in ETH) param {Number} weeks - period of policy param {Number} amount - amount of policy param {String} referralAddress - user address (in ETH) buyPolicy(id, web3, userAddress, weeks, amount, referralAddress).then() ``` **Display purchased policies** ``` import {_getWhitelistedContracts, getCoverageApprove, provideCoverage} from 'bridgemutual'; //returnts list of whitelisted contracts param {Object} web3 - instance of web3 param {Boolean} isTest - for use Rinkeby TestNet _getWhitelistedContracts(web3, isTest).then(policies => { //policies <== list of policies }) //returns list of purchased policies param {Object} web3 - instance of web3 param {String} userAddress - user address (in ETH) param {Boolean} active - active/unactive policies param {Number} offset - offset param {Number} limit - limit param {Boolean} isTest - for use Rinkeby TestNet getPurchasedPolicies (web3, userAddress, active, offset, limit, isTest).then(listPurchasedPolicies => { //listPurchasedPolicies <== list purchased policies }) ``` **Earn Interest** ``` import {_getWhitelistedContracts, getCoverageApprove, provideCoverage} from 'bridgemutual'; //returnts list of whitelisted contracts param {Object} web3 - instance of web3 param {Boolean} isTest - for use Rinkeby TestNet _getWhitelistedContracts(web3, isTest).then(policies => { //policies <== list of policies }) //returns current allowance param {Object} web3 - instance of web3 param {String} userAddress - user address (in ETH) param {Number} id - Id of policy param {Boolean} isTest - for use Rinkeby TestNet getAllowance (web3, userAddress, id, isTest).then(currentAllowance => { //currentAllowance <== current allowance }) //returns current allowance param {Object} web3 - instance of web3 param {String} userAddress - user address (in ETH) param {Number} id - Id of policy param {Boolean} isTest - for use Rinkeby TestNet resetAllowance(web3, userAddress, id, isTest).then(currentAllowance => { //currentAllowance <== current allowance equal 0 }) //returns current allowance param {Object} web3 - instance of web3 param {String} userAddress - user address (in ETH) param {Number} id - Id of policy param {Number} amount - amount of coverage param {Boolean} isTest - for use Rinkeby TestNet setAllowance (web3, userAddress, id, amount, isTest).then(currentAllowance => { //currentAllowance <== current allowance }) //returns coverage provided result param {Number} id - Id of policy param {String} userAddress - user address (in ETH) param {Number} amount - amount of coverage provideCoverage(id, userAddress, amount).then() ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://dein-fi.gitbook.io/bridge-mutual/v2/bridge-mutual-widget/widget-integration/sdk-integration.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.