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# Upgrade Watchdog Testnet Canister

Upgrades the testnet watchdog canister to make it less sensitive to conditions
that would disable access to the bitcoin api. The previous release of the
watchdog disabled the Bitcoin testnet canister whenever it's +/- 2 blocks behind
block explorers. Given the frequent surges in blocks when difficulty is reset,
this proposal changes the threshold to be +/- 100.

## Change Log

* fix: make the bitcoin testnet watchdog less sensitive by @ielashi in https://github.com/dfinity/bitcoin-canister/pull/277

## Verify Wasm Hash

NOTE: This verification process may not yet work for M1 Macs.

```shell
# Clone bitcoin-canister repo.
$ git clone git@github.com:dfinity/bitcoin-canister.git
$ cd bitcoin-canister
$ git checkout 62a71e47c491fb842ccc257b1c675651501f4b82 # release/2024-01-22

# Build all the docker canisters.
$ docker build -t canisters .

# Extract canister's wasm.
$ docker run --rm --entrypoint cat canisters /watchdog-canister.wasm.gz > watchdog-canister.wasm.gz

# Calculate SHA-256 of the canister's wasm.
$ sha256sum watchdog-canister.wasm.gz
```

Expected output:

```shell
ababd5b7943a81c0216f6717fa554840a7a8c647840e529bd4185bbef9a9a18f  watchdog-canister.wasm.gz
```

## Verify Upgrade Arguments

```shell
$ ARG="(variant { testnet })"

$ didc encode -d ./watchdog/candid.did -t '(bitcoin_network)' "$ARG"
```

Expected output:

```shell
4449444c016b02c483f7da037fcb8eeaee0b7f010001
```


Upgrade NNS Canister: gjqfs-iaaaa-aaaan-aaada-cai to wasm with hash: ababd5b7943a81c0216f6717fa554840a7a8c647840e529bd4185bbef9a9a18f