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Documentation Index

Fetch the complete documentation index at: https://docs.binibit.com/llms.txt

Use this file to discover all available pages before exploring further.

Bridge A converts off-chain Crystals (CRS) into on-chain USBI on BiniChain.

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Conversion rate

10,000 CRS  =  1 USBI
Fixed rate. No oracle, no slippage, no fee on the bridge itself.

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Level gate

Bridge A unlocks at Level 5 (50,000,000 XP). Below Level 5, users earn USBI entitlement but cannot bridge it on-chain. This gate exists to ensure users have engaged with the app before flowing into BaiDEX, reducing thin-account spam.

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How it interacts with USBI entitlement

The bridge consumes: Bridging does not create new USBI entitlement on its own — but the CRS spent during the bridge does count as XP, which raises your entitlement. So bridging is itself slightly self-funding. Walk-through:
  1. User has 10,000,000 CRS spent on lessons → 10,000,000 XP → 1,000 USBI entitlement
  2. User wants to bridge 5,000,000 CRS into 500 USBI
  3. Bridge action burns 5,000,000 CRS, mints 500 USBI on BiniChain
  4. CRS spent during bridge counts as XP → total XP becomes 15,000,000 → entitlement becomes 1,500 USBI
  5. User now has 500 USBI on-chain and 1,000 USBI of remaining entitlement

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Cap

USBI bridged on-chain is bounded by total USBI entitlement (welcome grant + XP-derived). A user cannot bridge more USBI than they are entitled to.

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Gas

The user pays BiniChain gas in BINI to execute the bridge transaction. See BINI Bridge for getting BINI native if needed.

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Sandbox vs Mainnet

USBI is a sandbox stablecoin — it is not externally redeemable. Bridge A operates inside the sandbox/testnet phase. The mainnet evolution of USBI (or its replacement) is on the roadmap. See BINI Token / Roadmap.

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Formula in code

const RATIO = 10_000;

function usbiFromCrs(crsBurned) {
  return Math.floor(crsBurned / RATIO);
}

function crsRequiredFor(usbiTarget) {
  return usbiTarget * RATIO;
}

USBI Formula

The entitlement headroom

BINI Bridge

Bridge B: BINI off → BINI native

Bini App / USBI Bridge

User-facing bridge UI

BaiDEX Pools

Where USBI provides liquidity