> ## Documentation Index
> Fetch the complete documentation index at: https://cantor8.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Core concepts

## Canton network

C8 Wallet is built on [Canton](https://www.canton.network/), a privacy-enabled blockchain designed for institutional finance.

<Info>
  Rather than Ethereum-style addresses, Canton uses:

  * **`partyId`** — string identifier for a participant (account)
  * **`instrumentId`** — string identifier for a tokenized asset

  Your dApp works with these identifiers throughout the SDK.
</Info>

## Popup + postMessage architecture

The SDK uses two channels to talk to the wallet, depending on the request type:

<CardGroup cols={2}>
  <Card title="window.postMessage" icon="lock">
    **Interactive actions** that require user consent, auth, or cryptographic signatures — e.g. connecting an account or signing a transaction.
  </Card>

  <Card title="HTTP API" icon="cloud-arrow-down">
    **Read-only data** retrieval that does not require user intervention — e.g. fetching instruments or balances.
  </Card>
</CardGroup>

## Instruments and holdings

An **instrument** is a Canton asset type (e.g. a tokenized currency or security). A **holding** is a specific account's balance of that instrument.

The typical flow:

<Steps>
  <Step title="List instruments">
    `getInstruments()` — pick an `instrumentId`.
  </Step>

  <Step title="List accounts">
    `getAccounts(instrumentId)` — pick a `partyId` and holding.
  </Step>

  <Step title="Submit transfer">
    `send({ senderPartyId, instrumentId, amount, receiverPartyId })`.
  </Step>
</Steps>