DFINITY Foundation

Synapse.vote (formerly ICP Maximalist Network)

ICDevs.org

CryptoIsGood

Anvil

ICPL.app

ysyms

The Accumulators’ Neuron

RawTech Venture

Paul Young

ICPMANUAL

8yeargangDAO

Isaac Valadez

Krzysztof Żelazko

Nicolas.ic

Smaug’s Neuron for Retail Investors

Internet Computer Association

Arthur’s Neuron (used to be cycle_dao)

The Fools' Court

Always Rejects

John Wiegley

# Proposal to Upgrade the ckBTC Minter Canister

Git hash: `6f405daa25e663a5b767d26ac5586785a1c20d7a`

New compressed Wasm hash: `9525c491b534a854d31624ac36d155befd52acc607f5ae5316715027c70a351a`

Target canister: `mqygn-kiaaa-aaaar-qaadq-cai`

Previous ckBTC Minter proposal: https://dashboard.internetcomputer.org/proposal/109480

---

## Motivation

With this upgrade, the minimum ckBTC amount that can be converted to BTC increased from 0.1 mBTC (10K satoshi) to 1 mBTC (100K satoshi).
The original lower limit was a misconfiguration on the first deployment.
The fee estimation algorithm also became more precise.

## Upgrade args

```
git checkout 6f405daa25e663a5b767d26ac5586785a1c20d7a
cd rs/bitcoin/ckbtc/minter
didc encode -d ckbtc_minter.did -t '(MinterArg)' '(variant { Upgrade = opt record { retrieve_btc_min_amount = opt 100000 }})'
```

## Release Notes

```
$ git log --format="%C(auto) %h %s" 7ca62c7ab108e53b19d49505a12e62508fe25528..6f405daa25e663a5b767d26ac5586785a1c20d7a rs/bitcoin/ckbtc/minter

 78f1d15fd7 feat(ckBTC) Only allow min_confirmations decrease
 17bc54f7b6 feat(ckBTC) No heartbeat in logs
 ea52033e20 chore: Remove ckSatoshi wording
 2c56afcde8 fix(FI-602): fee estimation algorithm
 3b6314038c chore(ckBTC): get rid of upgrade.did file
```

## Wasm Verification

Verify that the hash of the gzipped WASM matches the proposed hash.

```
git fetch
git checkout 6f405daa25e663a5b767d26ac5586785a1c20d7a
./gitlab-ci/container/build-ic.sh -c
sha256sum ./artifacts/canisters/ic-ckbtc-minter.wasm.gz
```



Upgrade Nns Canister: mqygn-kiaaa-aaaar-qaadq-cai to wasm with hash: 9525c491b534a854d31624ac36d155befd52acc607f5ae5316715027c70a351a