nemeos-sdk
v0.1.7
Published
Nemeos SDK to facilitate integration with the Nemeos platform
Downloads
11
Maintainers
Readme
Building new web3 economies.
Nemeos SDK
Nemeos SDK to facilitate integration with the Nemeos platform.
Install
pnpm install nemeos-sdk
Usage
Note: This is a pure ESM package. If you are using CommonJS, you can use a bundler or import using dynamic import()
.
// ESM / TypeScript
import { NemeosSDK } from 'nemeos-sdk'
// CommonJS
const { NemeosSDK } = await import('nemeos-sdk')
Initialize SDK
Node.js
import * as ethers from 'ethers'
import { NemeosSDK } from 'nemeos-sdk'
const provider = new ethers.JsonRpcProvider(process.env.INFURA_ENDPOINT_WITH_API_KEY)
const wallet = new ethers.Wallet(process.env.WALLET_PRIVATE_KEY, provider)
const nemeosSdk = new NemeosSDK(wallet, {
enableLogging: true, // Enable logging to the console - Optional, default: `true`
nemeosBackendEnvironment: NemeosSDK.NemeosBackendEnvironment.Production, // Optional, default: `Production`
})
Browser
Using ethers.js
import * as ethers from 'ethers'
import { NemeosSDK } from 'nemeos-sdk'
const provider = new ethers.BrowserProvider(window.ethereum)
const signer = await provider.getSigner()
const nemeosSdk = new NemeosSDK(signer, {
enableLogging: true, // Enable logging to the console - Optional, default: `true`
nemeosBackendEnvironment: NemeosSDK.NemeosBackendEnvironment.Production, // Optional, default: `Production`
})
Using window.ethereum
import { NemeosSDK, getBrowserProvider } from 'nemeos-sdk'
const provider = getBrowserProvider(window.ethereum)
const signer = await provider.getSigner()
const nemeosSdk = new NemeosSDK(signer, {
enableLogging: true, // Enable logging to the console - Optional, default: `true`
nemeosBackendEnvironment: NemeosSDK.NemeosBackendEnvironment.Production, // Optional, default: `Production`
})
Nemeos Customer Client
The Nemeos Customer Client is used to interact with the Nemeos backend to manage customer data.
const nemeosCustomerClient = nemeosSdk.getNemeosCustomerClient()
Generate login signature
Trigger a signature request to the wallet. This signature is used to ensure that the customer is the owner of the wallet when interacting with the Nemeos backend.
The signature is valid for a few days.
const loginSignature = await nemeosCustomerClient.requestLoginSignature()
Fetch customer data
Fetch the customer data associated with the wallet address.
const customerData = await nemeosCustomerClient.fetchCustomerData(loginSignature)
Register email
Register the wallet to an email address. This is used to send email notifications and reminders to customers about their loans.
The email address will not be broadcasted on the blockchain. It is only stored in Nemeos backend database.
const emailAddress = '[email protected]'
await nemeosCustomerClient.registerEmail(loginSignature, emailAddress)
Unregister email
Unregister the wallet from its associated email address. The customer will no longer receive email notifications and reminders.
This will remove the email address from the Nemeos backend database.
await nemeosCustomerClient.unregisterEmail(loginSignature)
Nemeos Pool Client
The Nemeos Pool Client is used to interact with Nemeos pools smart contracts on the blockchain.
const nemeosPoolClient = nemeosSdk.getNemeosPoolClient({
nemeosPoolAddress: '0x812db15b8Bb43dBA89042eA8b919740C23aD48a3',
nftCollectionAddress: '0x15cd1cfCd48C06cfC44D433D66C7a9fE06b2C2c3',
nemeosPoolMode: NemeosSDK.NemeosPoolMode.BuyOpenSea, // Can be `BuyOpenSea` or `DirectMint`
})
Get Pool Balance
Retrieve the current balance of the pool smart contract in native token in wei (if balance is 1 ETH, will return 1000000000000000000
).
const poolBalance = await nemeosPoolClient.getPoolBalance()
console.log('Pool Balance:', poolBalance)
Preview a loan
try {
// Preview loan for Nemeos Pool `BuyOpenSea` mode
const nftId = '231'
const loanDurationDays = 61
const loanData = await nemeosPoolBuyOpenSeaClient.previewLoan(nftId, loanDurationDays)
// Preview loan for Nemeos Pool `DirectMint` mode
const loanDurationDays = 61
const loanData2 = await nemeosPoolDirectMintClient.previewLoan(loanDurationDays)
console.log('Preview loanData:', loanData)
console.log('Preview loanData2:', loanData2)
} catch (error) {
console.error('Preview loan failed!', error.message)
throw error
}
export type NftLivePriceBuyOpenSeaData = {
nftFullLivePriceData: {
/** @example "231" */
nftId: string
/** @example "4000000000000000000" */
openSeaNftPrice: string
/** @example "4" */
openSeaNftPriceHuman: string
/** @example "4" */
openSeaNftPriceHumanShortRound: string
/** @example "12686.2" */
openSeaNftPriceHumanUSD: string
/** @example "160000000000000003" */
nemeosOracleNftCollectionFloorPrice: string
/** @example "0.16" */
nemeosOracleNftCollectionFloorPriceHuman: string
/** @example "0.16" */
nemeosOracleNftCollectionFloorPriceHumanShortRound: string
/** @example "507.45" */
nemeosOracleNftCollectionFloorPriceHumanUSD: string
/** @example "3880000000000000000" */
proposedUpfrontPaymentGivenPrices: string
/** @example "3.88" */
proposedUpfrontPaymentGivenPricesHuman: string
/** @example "3.88" */
proposedUpfrontPaymentGivenPricesHumanShortRound: string
/** @example "12305.61" */
proposedUpfrontPaymentGivenPricesHumanUSD: string
/** @example "4000000000000000000" */
openSeaNftCollectionFloorPrice: string
/** @example "4" */
openSeaNftCollectionFloorPriceHuman: string
/** @example "4" */
openSeaNftCollectionFloorPriceHumanShortRound: string
/** @example "12686.2" */
openSeaNftCollectionFloorPriceHumanUSD: string
/** @example "3171.55" */
exchangeRateToUSD: string
/** @example "120000000000000000" */
remainingToPayPrice: string
/** @example "0.12" */
remainingToPayPriceHuman: string
/** @example "0.12" */
remainingToPayPriceHumanShortRound: string
/** @example "380.59" */
remainingToPayPriceHumanUSD: string
/** @example "121464000000000000" */
remainingToPayPriceWithInterests: string
/** @example "0.121464" */
remainingToPayPriceWithInterestsHuman: string
/** @example "0.121" */
remainingToPayPriceWithInterestsHumanShortRound: string
/** @example "385.23" */
remainingToPayPriceWithInterestsHumanUSD: string
/** @example "1464000000000000" */
interestsToPay: string
/** @example "0.001464" */
interestsToPayHuman: string
/** @example "0.001" */
interestsToPayHumanShortRound: string
/** @example "4.64" */
interestsToPayHumanUSD: string
/** @example "4001464000000000000" */
totalLoanPrice: string
/** @example "4.001464" */
totalLoanPriceHuman: string
/** @example "4.001" */
totalLoanPriceHumanShortRound: string
/** @example "12690.84" */
totalLoanPriceHumanUSD: string
/** @example 3 */
numberOfInstallments: number
paySchedule: Array<{
/** @example "3880000000000000000" */
toPay: string
/** @example "3.88" */
toPayHuman: string
/** @example "3.88" */
toPayHumanShortRound: string
/** @example "12305.61" */
toPayHumanUSD: string
/** @example "1721947310346" */
unixTimestampMs: string
/** @example "Friday, July 26" */
dateTimeHuman: string
/** @example "2024-07-25T22:41:50.346Z" */
dateTimeJSON: string
}>
}
nftPoolLiveData: {
/** @example "0x3a668917C167dfa823b2816e782704444503078D" */
nftPoolAddress: string
/** @example "25" */
minimalDepositPercent: string
/** @example "25" */
minimalDepositPercentHuman: string
/** @example "7" */
yearlyInterestPercent: string
/** @example "7" */
yearlyInterestPercentHuman: string
/** @example "5.6000000000000005" */
yearlyLiquidityProviderProfitsEstimationPercent: string
/** @example "5.6" */
yearlyLiquidityProviderProfitsEstimationPercentHuman: string
/** @example "309586878710840000" */
availableLiquidity: string
/** @example "0.30958687871084" */
availableLiquidityHuman: string
/** @example "0.31" */
availableLiquidityHumanShortRound: string
/** @example "981.87" */
availableLiquidityHumanUSD: string
/** @example "0" */
liquidityLockedInLoans: string
/** @example "0" */
liquidityLockedInLoansHuman: string
/** @example "0" */
liquidityLockedInLoansHumanShortRound: string
/** @example "0" */
liquidityLockedInLoansHumanUSD: string
/** @example "309586878710840000" */
totalValueLocked: string
/** @example "0.30958687871084" */
totalValueLockedHuman: string
/** @example "0.31" */
totalValueLockedHumanShortRound: string
/** @example "981.87" */
totalValueLockedHumanUSD: string
/** @example "3650" */
maxYearlyLoanRate: string
/** @example "43200" */
vestingTimePerBasisPoint: string
/** @example 0 */
currentOngoingLoansCount: number
/** @example 3 */
allTimeLoansCount: number
}
}
export type NftLivePriceDirectMintData = {
nftFullLivePriceData: {
/** @example "100000000000000000" */
mintPrice: string
/** @example "0.1" */
mintPriceHuman: string
/** @example "0.1" */
mintPriceHumanShortRound: string
/** @example "316.55" */
mintPriceHumanUSD: string
/** @example "25000000000000000" */
proposedUpfrontPaymentGivenPrices: string
/** @example "0.025" */
proposedUpfrontPaymentGivenPricesHuman: string
/** @example "0.025" */
proposedUpfrontPaymentGivenPricesHumanShortRound: string
/** @example "79.14" */
proposedUpfrontPaymentGivenPricesHumanUSD: string
/** @example "3165.45" */
exchangeRateToUSD: string
/** @example "75000000000000000" */
remainingToPayPrice: string
/** @example "0.075" */
remainingToPayPriceHuman: string
/** @example "0.075" */
remainingToPayPriceHumanShortRound: string
/** @example "237.41" */
remainingToPayPriceHumanUSD: string
/** @example "76372500000000000" */
remainingToPayPriceWithInterests: string
/** @example "0.0763725" */
remainingToPayPriceWithInterestsHuman: string
/** @example "0.076" */
remainingToPayPriceWithInterestsHumanShortRound: string
/** @example "241.75" */
remainingToPayPriceWithInterestsHumanUSD: string
/** @example "1372500000000000" */
interestsToPay: string
/** @example "0.0013725" */
interestsToPayHuman: string
/** @example "0.001" */
interestsToPayHumanShortRound: string
/** @example "4.34" */
interestsToPayHumanUSD: string
/** @example "101372500000000000" */
totalLoanPrice: string
/** @example "0.1013725" */
totalLoanPriceHuman: string
/** @example "0.101" */
totalLoanPriceHumanShortRound: string
/** @example "320.89" */
totalLoanPriceHumanUSD: string
/** @example 3 */
numberOfInstallments: number
paySchedule: Array<{
/** @example "25000000000000000" */
toPay: string
/** @example "0.025" */
toPayHuman: string
/** @example "0.025" */
toPayHumanShortRound: string
/** @example "79.14" */
toPayHumanUSD: string
/** @example "1721946366176" */
unixTimestampMs: string
/** @example "Friday, July 26" */
dateTimeHuman: string
/** @example "2024-07-25T22:26:06.176Z" */
dateTimeJSON: string
}>
}
nftPoolLiveData: {
/** @example "0xf4180C986Aec6f8fAdc6eFe4A0eC237c819AC074" */
nftPoolAddress: string
/** @example "25" */
minimalDepositPercent: string
/** @example "25" */
minimalDepositPercentHuman: string
/** @example "10" */
yearlyInterestPercent: string
/** @example "10" */
yearlyInterestPercentHuman: string
/** @example "8" */
yearlyLiquidityProviderProfitsEstimationPercent: string
/** @example "8" */
yearlyLiquidityProviderProfitsEstimationPercentHuman: string
/** @example "100000000000000000" */
availableLiquidity: string
/** @example "0.1" */
availableLiquidityHuman: string
/** @example "0.1" */
availableLiquidityHumanShortRound: string
/** @example "316.55" */
availableLiquidityHumanUSD: string
/** @example "0" */
liquidityLockedInLoans: string
/** @example "0" */
liquidityLockedInLoansHuman: string
/** @example "0" */
liquidityLockedInLoansHumanShortRound: string
/** @example "0" */
liquidityLockedInLoansHumanUSD: string
/** @example "100000000000000000" */
totalValueLocked: string
/** @example "0.1" */
totalValueLockedHuman: string
/** @example "0.1" */
totalValueLockedHumanShortRound: string
/** @example "316.55" */
totalValueLockedHumanUSD: string
/** @example "3650" */
maxYearlyLoanRate: string
/** @example "43200" */
vestingTimePerBasisPoint: string
/** @example 0 */
currentOngoingLoansCount: number
/** @example 0 */
allTimeLoansCount: number
}
}
Start a loan
try {
// Start loan for Nemeos Pool `BuyOpenSea` mode
const nftId = '224'
const loanDurationDays = 90
const tx = await nemeosPoolBuyOpenSeaClient.startLoan(nftId, loanDurationDays)
// Start loan for Nemeos Pool `DirectMint` mode
const loanDurationDays = 90
const whitelistProof = ['0x1234567890123456789012345678901234567890'] // Optional, necessary if there is a whitelist
const tx2 = await nemeosPoolDirectMintClient.startLoan(loanDurationDays, whitelistProof)
console.log('Starting loan success! Transaction hash:', tx.hash)
} catch (error) {
console.error('Starting loan failed!', error.message)
throw error
}
Retrieve a loan
const nftId = '224'
const loan = await nemeosPoolClient.retrieveLoan(nftId)
type Loan = {
/** Borrower address */
borrower: string
/** Token ID */
tokenID: bigint
/** Amount owed with interest */
amountOwedWithInterest: bigint
/** Next payment amount */
nextPaymentAmount: bigint
/** Interest amount per payment */
interestAmountPerPayment: bigint
/** Loan duration in seconds */
loanDurationInSeconds: bigint
/** Start time */
startTime: bigint
/** Next payment time */
nextPaymentTime: bigint
/** Remaining number of installments */
remainingNumberOfInstallments: number
/** Daily interest rate at start */
dailyInterestRateAtStart: bigint
/** Is closed */
isClosed: boolean
/** Is in liquidation */
isInLiquidation: boolean
}
Pay the next loan step
try {
const nftId = '224'
const tx = await nemeosPoolClient.payNextLoanStep(nftId)
console.log('Paying next loan step success! Transaction hash:', tx.hash)
} catch (error) {
console.error('Paying next loan step failed!', error.message)
throw error
}
Build
pnpm build
Tests
Test script
# touch .env, or set the environment variables in the command line
export NODE_ENV=development # to connect to Nemeos backend at http://localhost:3000
export WALLET_PRIVATE_KEY=43ac571235456515454565645445454546123121454848791215488877897123
export INFURA_ENDPOINT_WITH_API_KEY=https://sepolia.infura.io/v3/b3866123121321321231212132131123
node tests/test.mjs
Browser test page
Build the test page and the required dependencies with Parcel
pnpm i --global parcel
parcel tests/browser/index.html