DFINITY Foundation

Synapse.vote (original)

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

ICLight.io

Synapse.vote (NEW)

Taggr Network

CodeGov.org

Internet Computer Association

Arthur’s Neuron (used to be cycle_dao)

Inactive (Request Removal) - The Fools' Court

Always Rejects

John Wiegley

# Summary

Git Hash: `e9a789189425bb70e7bf6bf0efa1dfa4a3e180f9`
Compressed WASM Hash: `513bd326c827881278810c09327573a95aac84976a9a97c769847179223ffc27`
Target Canister: `uf6dk-hyaaa-aaaaq-qaaaq-cai`

## Features

- The pricing has been updated in accordance with the new [price function of HTTPS outcalls](https://forum.dfinity.org/t/a-new-price-function-for-https-outcalls/20838). In short, the number of cycles that need to be attached and the number of cycles charged have been reduced by a factor of 10!
- The exchange rate canister now supports variable decimals. That is, the decimals field in the returned exchange rate metadata may deviate from the default value 9 to represent very small or large exchange rates.
- Since all rates are represented as integers, the standard deviation in the metadata is now computed using an integer square-root function to minimize the use of floating-point operations.
- The exchange rate canister now supports the upcoming `dfx deps` feature, which will make it possible to easily install canisters locally.
- Several new end-to-end tests have been added to test the canister’s behavior in various scenarios.

## Commit Log

```bash
$ git checkout 
$ git log --format="%C(auto) %h %s" aff48f88ea2f26bb16dea1d644636dc00197c942..e9a789189425bb70e7bf6bf0efa1dfa4a3e180f9 --  ./src/xrc
```

```
 e9a7891 `chore`: Update Coinbase max response bytes (#236)
 c55e2f5 Update cycle pricing (#232)
 bfb1f74 Removing floating-point square-root operations (#230)
 cd127b1 fix(stddev): Update standard deviation to account for overflow (#229)
 e6030c9 feat: Enabling variable decimals (#222)
 2b82623 feat: Mock forex and stablecoin responses (#221)
 ef51b10 chore: Update rust version to 1.69.0 (#215)
```

## Verify the WASM hash of the canister

```
$ export IP_SUPPORT=ipv4
$ ./scripts/docker-build
$ sha256sum xrc.wasm.gz
```

Expected output

```
513bd326c827881278810c09327573a95aac84976a9a97c769847179223ffc27  xrc.wasm.gz
```


Upgrade NNS Canister: uf6dk-hyaaa-aaaaq-qaaaq-cai to wasm with hash: 513bd326c827881278810c09327573a95aac84976a9a97c769847179223ffc27