@wkalidev/b2s-contracts

$B2S Token — TypeScript SDK & Smart Contract addresses for Base2Stacks DeFi on Stacks mainnet.

Why this SDK?

If you're building on Stacks and need to interact with $B2S DeFi contracts (token, staking, liquidity pool, governance, prediction markets, agent check-in), this SDK gives you:

• All mainnet contract addresses in one place — no more copy-pasting
• TypeScript-first — full type definitions included
• Tree-shakeable — ESM + CJS, import only what you need
• Helper functions — AMM swap math, APY calculator, address utils
• Client classes — B2SClient, RewardsClient, OracleClient, AgentClient, QuestClient

Installation

npm install @wkalidev/b2s-contracts
# or
yarn add @wkalidev/b2s-contracts
# or
pnpm add @wkalidev/b2s-contracts

Deployed Contracts (Stacks Mainnet)

Deployer: SP1V72500C63KN9E348QDK9X879MASSTN0J3KBQ5N

| Contract | Name | Description | |----------|------|-------------| | b2s-token-v4 | $B2S Token | SIP-010 fungible token, 6 decimals | | b2s-staking-vault-v2 | Staking Vault | 12.5–37.5% APY with lock multipliers | | b2s-staking-vault-v3 | Staking Vault v3 | Latest staking vault | | b2s-liquidity-pool-v6 | AMM Pool | Constant product AMM, 0.25% fee | | b2s-rewards-distributor | Rewards | 5 B2S daily claim | | b2s-governance | DAO | On-chain proposals & voting | | b2s-fee-router | Fee Router | Bridge fee collection & distribution | | b2s-prediction-market | Prediction | AMM-style prediction markets | | b2s-price-oracle | Oracle | On-chain price feeds | | b2s-airdrop | Airdrop | Token airdrop distribution | | stacks-quest-v2 | Quest Game | Daily on-chain puzzle game | | stacks-quest-agent-v3 | Agent | Daily check-in + action log | | toolkit-math | Math | Safe Clarity arithmetic |

Quick Start

Get contract addresses

import { CONTRACTS, CONTRACT_NAMES, getContractId } from '@wkalidev/b2s-contracts/contracts'

console.log(CONTRACTS['b2s-token-v4'])
// → 'SP1V72500C63KN9E348QDK9X879MASSTN0J3KBQ5N.b2s-token-v4'

const stakingId = getContractId(CONTRACT_NAMES.STAKING_VAULT)
// → 'SP1V72500C63KN9E348QDK9X879MASSTN0J3KBQ5N.b2s-staking-vault-v2'

Read $B2S balance

import { B2SClient } from '@wkalidev/b2s-contracts'

const client = new B2SClient()
const { formatted } = await client.getBalance('SP1ABC...XYZ')
console.log(`Balance: ${formatted} B2S`)

Agent — Daily check-in & streaks

import { AgentClient } from '@wkalidev/b2s-contracts'

const agent = new AgentClient()

// Get user streak
const streak = await agent.getStreak('SP1ABC...XYZ')
console.log(`Streak: ${streak.currentStreak} days`)
console.log(`Best: ${streak.bestStreak} days`)

// Check if user checked in today
const checkedIn = await agent.hasCheckedInToday('SP1ABC...XYZ')
console.log(`Checked in today: ${checkedIn}`)

// Get check-in fee (in microSTX)
const fee = await agent.getCheckinFee()
console.log(`Fee: ${fee / 1_000_000} STX`)

// Global stats
const stats = await agent.getGlobalStats()
console.log(`Total check-ins: ${stats.totalCheckins}`)
console.log(`Total fees collected: ${stats.totalFees} microSTX`)

Quest — Daily puzzle game

import { QuestClient } from '@wkalidev/b2s-contracts'

const quest = new QuestClient()

// Get player stats
const stats = await quest.getPlayerStats('SP1ABC...XYZ')
console.log(`Games played: ${stats.totalPlayed}`)
console.log(`Games won: ${stats.totalWon}`)
console.log(`Current streak: ${stats.currentStreak}`)

// Check if player already played today
const played = await quest.hasPlayedToday('SP1ABC...XYZ')
console.log(`Played today: ${played}`)

// Get today's puzzle type
const puzzle = await quest.getTodayPuzzle()
console.log(`Today's puzzle: ${puzzle?.puzzleType}`)

// Global stats
const global = await quest.getGlobalStats()
console.log(`Total games: ${global.totalGames}`)

AMM swap calculation

import { calcSwapOutput, calcEffectiveApy, calcBridgeFee } from '@wkalidev/b2s-contracts/helpers'

const { amountOut, fee, priceImpact } = calcSwapOutput(
  1_000_000n,
  50_000_000n,
  10_000_000n,
)

calcEffectiveApy(2100) // → 37.5%
calcEffectiveApy(0)    // → 12.5%

const { totalFeeMicro, toTreasury, toStakers } = calcBridgeFee(1_000_000_000n)

Staking rewards

import { RewardsClient } from '@wkalidev/b2s-contracts'

const rewards = new RewardsClient()
const pending = await rewards.getPendingRewards('SP1ABC...XYZ')
console.log(`Pending: ${pending.formatted} B2S`)

Price oracle

import { OracleClient } from '@wkalidev/b2s-contracts'

const oracle = new OracleClient()
const { price } = await oracle.getPrice('STX-USD')
console.log(`STX price: $${price}`)

Utilities

import {
  toMicroUnits, fromMicroUnits, formatB2S,
  blocksToDuration, isValidStacksAddress, truncateAddress,
} from '@wkalidev/b2s-contracts/helpers'

formatB2S(5_000_000n)              // → '5.000000 B2S'
blocksToDuration(2100)             // → '~14d 0h'
isValidStacksAddress('SP1ABC...') // → true
truncateAddress('SP1V725...BQ5N') // → 'SP1V72...Q5N'

TypeScript Types

import type {
  TokenBalance, StakePosition, PoolReserves, SwapQuote,
  BridgeTransaction, Proposal, ClaimRecord, PriceFeed,
  CheckinStreak, AgentGlobalStats, AgentAction,
  QuestAttempt, PlayerStats, DailyPuzzle,
  Result,
} from '@wkalidev/b2s-contracts/types'

Development

git clone https://github.com/wkalidev/b2s-token-contract.git
cd b2s-token-contract
npm install
npm run build
npm test

Live Apps

• base2stacks-tracker.vercel.app — Full DeFi protocol
• stacks-quest-ten.vercel.app — Daily puzzle game
• stacks-quest-ten.vercel.app/agent — Non-custodial AI agent

Changelog

v1.3.0

• Added AgentClient — streak, check-in, global stats
• Added QuestClient — player stats, puzzle, game stats
• New types: CheckinStreak, AgentGlobalStats, PlayerStats, DailyPuzzle

v1.2.3

• B2SClient, RewardsClient, OracleClient, FeeRouterClient
• AMM math helpers, APY calculator, bridge fee calculator

Contributing

PRs welcome! See CONTRIBUTING.md

License

MIT — © 2026 wkalidev

Built for #StacksBuilderRewards 2026