Open source · Internet Computer · since 2023

Infrastructure for apps that hold their own keys.

B3Pay builds open-source wallets, TypeScript libraries and workflow tooling for the Internet Computer. No centralized backend sits between your users and their assets.

Start building View the repos

chains

projects

packages

MIT

licence

Order 4821 · 2 × b3forge seatRunning

pricing order · awaiting rate

0.0241 BTC

awaiting deposit address

0.0241 ckBTC

awaiting mint

Quote

get_exchange_raterate-oracle—

invoice_createmerchant—

Mint

get_btc_addressckbtc-minter—

bitcoin_get_utxosbtc-network—

check_transactionbtc-checker—

update_balanceckbtc-minter—

Pay

icrc2_approvewallet—

icrc2_transfer_fromckbtc-ledger—

settle_receiptbrowser—

Result

0.0000 ckBTCPending

Subtotal

—

Ledger fee

—

Net

—

awaiting settlement

What we build

Four open-source projects, one thesis.

Users should keep custody. Developers should not have to give up type safety to make that happen. Everything below is MIT-licensed and runs on the Internet Computer.

How it works

No backend. No custody handover.

Every product here runs its logic on the client or inside a canister the user owns. That constraint shapes the whole stack.

Identity stays with the user

Internet Identity issues a delegated identity in the browser. B3Pay never holds a key, a seed phrase or a session on a server.

State lives in a canister

A B3Wallet is a canister the user controls. Upgrades, signers and thresholds are decisions they make on-chain, not requests to us.

Types survive the boundary

IC Reactor generates TypeScript from Candid, so a canister method signature is a compile error in your editor before it is a runtime failure.

For developers

One call wires the client, the cache and the hooks.

defineReactor creates the QueryClient, ClientManager, reactor and bound hooks — including useAuth and useUserPrincipal.

Read the guide npm

src/reactor.ts

import { defineReactor } from "@ic-reactor/react"
import { idlFactory, type _SERVICE } from "./declarations/backend"
 
export const {
  reactor,
  useActorQuery,
  useActorMutation,
  useAuth,
} = defineReactor<_SERVICE>({
  name: "backend",
  idlFactory,
  canisterId: "rrkah-fqaaa-aaaaa-aaaaq-cai",
  display: true,
})

From the blog

The wire keeps publishing.

Our blog is a machine-run technical wire: stories on AI, Web3 and the Internet Computer, researched and published by an AI pipeline with grounded sources on every one.

Read the blog