Technical Reference

👥 Audience: All developers. Quick-reference for contract addresses, token details, network info, and fee structure.

⚠️ All addresses and technical details require Engineering verification before publication. Values below are sourced from internal documentation and may not reflect the latest live deployments.

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Token Details

Property	Value
Name	CBTC (Canton Bitcoin)
Standard	CIP-56 (Canton Instrument Protocol)
Backing	1:1 with native BTC
Network	Canton Network
Deposit requirement	Taproot-compatible Bitcoin wallet (P2TR)
Minimum mint	0.001 BTC
Confirmations	6 Bitcoin blocks (~60 minutes)
Audit	Quantstamp

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Network Environments

Environment	Registry URL	Coordinator URL	Bitcoin Network
Devnet	https://api.utilities.digitalasset-dev.com	https://devnet.dlc.link/attestor-2	Bitcoin Testnet
Testnet	https://api.utilities.digitalasset-staging.com	https://testnet.dlc.link/attestor-1	Bitcoin Testnet
Mainnet	https://api.utilities.digitalasset.com	https://mainnet.dlc.link/attestor-1	Bitcoin Mainnet

For full Instrument IDs per network, see Instrument ID Management.

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Canton Network Requirements

To interact with CBTC you need:

1. Canton participant node — connected to the target network (devnet/testnet/mainnet)

2. CBTC DAR files — installed on your participant. All versions must be installed to access all live contract versions.

• Download: github.com/DLC-link/cbtc-lib/tree/v0.3.0/cbtc-dars

1. OIDC provider — Keycloak (officially supported) or Auth0 (community example)

2. Canton CLI — version 3.3.0+ for DAR upload scripts

3. Prerequisites for CLI: jq, curl, java (11+)

DAR Upload

git clone https://github.com/DLC-link/canton-public.git
cd canton-public
# Edit misc/connect.conf to point to your participant
canton run 00_UploadDars.sc -c ./misc/connect.conf

The upload script is idempotent — safe to re-run.

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Fee Structure

✅ Confirmed: Mint and burn fees are 0%. There are no BitSafe fees on CBTC mint or burn operations.

Canton Transfer Costs

• CBTC transfers on Canton cost approximately $3–5 per transaction (network gas, not BitSafe fees)

• Cost varies based on payload size and UTXO count

• Sending CBTC is generally more expensive than sending Canton Coin (CC) due to larger payload

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GitHub Repositories

Repository	Description	Link
cbtc-lib	Rust SDK for CBTC operations (mint, burn, transfer)	GitHub
canton-lib	Lower-level Canton interaction library	GitHub
canton-public	DAR files, upload scripts, connect config	GitHub

Note: cbtc-lib (crate name: cbtc) is at v0.3.0. It depends on canton-lib v0.3.0. Update your dependencies if using an earlier version. See the cleanup PR.

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Transfer Speed

• Canton transfers take a few seconds each

• Practical throughput: ~500 transfers per 10-minute period

• UTXO limit: 10 UTXOs per party (Canton recommendation). Exceeding this increases load and fees.

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External Links

• CBTC Technical Documentation (live site)

• Canton Network

• Canton Developer Docs

• FROST Whitepaper

• Quantstamp Audit Report

• Canton Whitepaper

• Chainlink Proof of Reserve (CBTC)

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🔴 ⚙️ Engineering Review Required — All addresses, URLs, fee information, and technical details must be validated by Engineering (Jesse or Robert) against live deployments before publication.