Build on Blip

Overview

There are two ways to integrate with Blip, and most dApps use both:

• The injected provider. When your site loads in the Blip in-app browser, Blip injects a Quai provider at window.quai (also aliased to window.pelagus and window.ethereum). You call request() exactly like any EIP-1193 wallet.
• Deep links. From anywhere on the web you can hand a user off into Blip — to open your dApp in the in-app browser, to share a contact, or to attach a referral — using https://blippay.me/... universal links or the blip:// URL scheme.

App wallet spec

Blip is fully self-custody. Keys never leave the device, and there is no Blip account or server-side custody. Two wallet concepts matter for builders:

• Main vault wallet. The user's primary, mnemonic-backed wallet. It owns the user's balance and is the only thing that authorizes funding transfers into app wallets.
• App wallets. Deterministic per-origin wallets derived from the same mnemonic — one wallet per canonical dApp origin. They are standard EOAs (not smart-contract wallets), so everything works through ordinary RPC signing and sending. App wallets sandbox each site: a balance and history scoped to your origin, isolated from the user's main funds.

Derivation

App wallets are derived locally and deterministically. Index 0 is the main vault, index 1 is the referral wallet, and app-wallet allocation begins at index 2. A canonical origin keeps its assigned index unless the user explicitly rotates it, so your dApp sees a stable address across sessions and reinstalls.

Encrypted registry

Because the index-to-origin mapping is what makes the addresses stable, Blip publishes an encrypted snapshot of origin → derivationIndex on-chain, keyed by the user's main vault address. The plaintext never leaves the device — the contract stores opaque ciphertext only — so app-wallet structure survives a device loss or fresh install without any centralized database. You don't call this contract; it's listed here so the model is transparent.

Referral design

Blip has a built-in referral graph. Every user can share a link that, when opened, adds them as the referrer for the new user and keeps the referral tree intact through install and setup.

Link format

Referral and contact links share one shape. Universal links live under blippay.me; the same payload maps to a blip:// deep link once Blip is installed.

https://blippay.me/referral/<code>?name=Ada&q=0x...&qi=<qiPaymentCode>&uqi=<upstreamQiCode>

blip://referral?code=<code>&name=Ada&q=0x...&qi=<qiPaymentCode>&uqi=<upstreamQiCode>

The /contact and /profile paths take the same params (a referral code rides along as referralCode) but share a profile instead of opening a referral.

Deep links

Blip registers both universal links on blippay.me and the blip:// custom scheme. Universal links degrade gracefully: open one without Blip installed and you get a web page with an "Open in Blip" button and store links.

Open your dApp in Blip

The most useful link for builders: send users straight into your dApp inside Blip's browser, where the provider is available. The url must be HTTPS, with a hostname and no embedded credentials.

https://blippay.me/browser?url=https%3A%2F%2Fyourdapp.example

blip://browser?url=https%3A%2F%2Fyourdapp.example

<a href="https://blippay.me/browser?url=https%3A%2F%2Fyourdapp.example">
  Open in Blip
</a>

Platform identifiers

In-app browser

Blip ships a full dApp browser — WKWebView on iOS, WebView on Android — with a Safari-style chrome that hides on scroll. At document start, before your page scripts run, Blip injects a Quai provider and announces it via EIP-6963. From your side it behaves like any injected wallet:

• The provider is reachable at window.quai, and aliased to window.pelagus and window.ethereum for compatibility with existing Quai/EVM dApp code.
• It carries identity flags: isBlip: true, isPelagus: true, isQuai: true, and a marker _isSwiftBlip: true. isMetaMask is false.
• It implements request({ method, params }), the on(...) / removeListener(...) event interface, and a legacy enable() that maps to quai_requestAccounts.
• Discovery also works via the EIP-6963 eip6963:announceProvider event, so libraries that enumerate providers will find Blip without touching globals.

The Blip provider

Requests follow EIP-1193: provider.request({ method, params }) returns a promise. Errors are thrown as provider errors with a numeric code and message. Both quai_* and the equivalent eth_* method names are accepted.

Supported methods

Events

The provider emits accountsChanged, chainChanged, connect, and disconnect. Subscribe with on():

window.quai.on("accountsChanged", (accounts) => { /* re-render */ });
window.quai.on("chainChanged", (chainId) => { /* chainId is hex, e.g. "0x9" */ });
window.quai.on("connect", (info) => { /* info.chainId */ });
window.quai.on("disconnect", (err) => { /* tear down */ });

App-wallet funding

Because each origin gets its own app wallet, that wallet may be empty when your dApp needs to act. The funding protocol lets you ask Blip to move funds from the user's main vault into the app wallet — either with an approval sheet, or silently for native QUAI within the user's per-app limit.

Discover support

Call wallet_getProviderState to learn the active app-wallet address and whether automatic native top-up is enabled.

{
  "wallet": "blip",
  "accounts": ["0x..."],
  "chainId": "0x9",
  "isConnected": true,
  "isUnlocked": true,
  "appWallet": {
    "connected": true,
    "address": "0x...",
    "autoTopUpEnabled": true,
    "nativeAutoTopUpLimitWei": "1000000000000000000000"
  },
  "features": {
    "appWalletNativeTopUp": true,
    "appWalletTokenFunding": true
  }
}

Request funding

Request the full action's shortfall, not just the input — Blip recommends estimating gas against the real transaction and adding at least a 10% fee buffer.

{
  "chainId": "0x9",
  "reason": "swap",
  "continueLabel": "Continue QUAI swap",
  "assets": [
    {
      "type": "native",
      "symbol": "QUAI",
      "decimals": 18,
      "amountWei": "0x56bc75e2d63100000",
      "purpose": "swapInput"
    },
    {
      "type": "erc20",
      "token": "0x...",
      "symbol": "WQI",
      "decimals": 18,
      "amount": "0x8ac7230489e80000",
      "purpose": "swapInput"
    }
  ]
}

{
  "funded": true,
  "txHashes": ["0x..."],
  "balances": { "native": "0x...", "0xTokenAddress": "0x..." }
}

Errors use provider codes: 4001 user rejected, 4100 app wallet unavailable, 4902 unsupported chain, 4200 unsupported asset, -32010 insufficient main-vault balance, -32602 malformed params.

dApp quickstart

A minimal connect → sign → send flow inside the Blip browser. No SDK; this is plain EIP-1193.

function getBlip() {
  const p = window.quai || window.pelagus || window.ethereum;
  return p && (p.isBlip || p._isSwiftBlip) ? p : null;
}

const blip = getBlip();
if (!blip) {
  // Not inside Blip — offer the deep link instead.
  // location.href = "https://blippay.me/browser?url=" + encodeURIComponent(location.href);
}

const [account] = await blip.request({ method: "quai_requestAccounts" });
console.log("Connected app wallet:", account);

const chainId = await blip.request({ method: "quai_chainId" }); // "0x9"

const signature = await blip.request({
  method: "personal_sign",
  params: ["0x" + Buffer.from("Welcome to my dApp").toString("hex"), account],
});

// Optional: top up the per-origin app wallet before a value transfer.
const state = await blip.request({ method: "wallet_getProviderState" });

if (state.appWallet?.connected) {
  await blip.request({
    method: "blip_requestAppWalletFunding",
    params: [{
      chainId: "0x9",
      reason: "gas",
      assets: [{ type: "native", symbol: "QUAI", decimals: 18,
                 amountWei: "0x16345785d8a0000", purpose: "gas" }],
    }],
  });
}

const txHash = await blip.request({
  method: "quai_sendTransaction",
  params: [{
    from: account,
    to: "0xRecipient...",
    value: "0xde0b6b3a7640000", // 1 QUAI
    data: "0x",
  }],
});
console.log("Submitted:", txHash);

blip.on("accountsChanged", ([next]) => setAccount(next));
blip.on("chainChanged", () => window.location.reload());

For AI agents

Building an agent, an LLM tool, or an automated client that needs to understand Blip? Start with the machine-readable summary — it follows the llms.txt convention and distills this page into a compact, link-rich brief.

curl https://blippay.me/llms.txt

What is automatable

• Deep links. Agents can construct and hand off https://blippay.me/browser?url=..., /referral, and /contact links deterministically — see Deep links for exact params.
• Transaction building. Prepare Quai transactions off-app with quais.js against a Quai RPC, then have the user submit them in Blip.
• In-browser provider. An agent driving a browser session inside the Blip in-app browser uses the same EIP-1193 window.quai surface documented above.

What is not

• No headless wallet API. Blip exposes no remote endpoint to control the wallet. The provider exists only inside the in-app browser.
• Human in the loop. Every signature and every send requires explicit on-device user approval. Blip is self-custody by design — there is no key an agent can hold or act with autonomously.

Where to go next