feat: add genesis dfn address (#185)

Genesis addresses were given in 'DFN' form, which essentially just encoded the K256 key as an Ethereum address instead of a principal. This address is required for the KYC process, so keysmith had an option to print it. This PR adds that functionality to quill as well.

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- Added option to print DFN address for Genesis investors. (#184)
+
 ## [0.4.1] - 2023-03-23
 
 - Added release binaries for linux-gnu in addition to linux-musl on amd64.

Cargo.toml

@@ -54,6 +54,7 @@ crc32fast = "1.3.2"
 data-encoding = "2.3.3"
 itertools = "0.10.5"
 atty = "0.2.14"
+sha3 = "0.10.6"
 
 [dev-dependencies]
 tempfile = "3.3.0"

docs/cli-reference/quill-public-ids.md

@@ -12,9 +12,10 @@ quill public-ids [option]
 
 ## Flags
 
-| Flag           | Description                 |
-|----------------|-----------------------------|
-| `-h`, `--help` | Displays usage information. |
+| Flag            | Description                                                    |
+|-----------------|----------------------------------------------------------------|
+| `-h`, `--help`  | Displays usage information.                                    |
+| `--genesis-dfn` | Additionally prints the legacy DFN address for Genesis claims. |
 
 ## Options
 

src/commands/public.rs

@@ -1,31 +1,42 @@
 use crate::lib::{get_account_id, get_identity, AnyhowResult, AuthInfo};
-use anyhow::anyhow;
+use anyhow::{anyhow, bail, Context};
 use candid::Principal;
 use clap::Parser;
 use icp_ledger::AccountIdentifier;
+use k256::{elliptic_curve::sec1::ToEncodedPoint, SecretKey};
+use sha3::{Digest, Keccak256};
 
 #[derive(Parser)]
 /// Prints the principal id and the account id.
 pub struct PublicOpts {
     /// Principal for which to get the account_id.
     #[clap(long)]
     principal_id: Option<String>,
+    /// Additionally prints the legacy DFN address for Genesis claims.
+    #[clap(long, conflicts_with = "principal-id")]
+    genesis_dfn: bool,
 }
 
 /// Prints the account and the principal ids.
 pub fn exec(auth: &AuthInfo, opts: PublicOpts) -> AnyhowResult {
-    let (principal_id, account_id) = get_public_ids(auth, opts)?;
+    let (principal_id, account_id) = get_public_ids(auth, &opts)?;
     println!("Principal id: {}", principal_id.to_text());
     println!("Account id: {}", account_id);
+    if opts.genesis_dfn {
+        let AuthInfo::PemFile(pem) = auth else {
+            bail!("Must supply a pem or seed file for the DFN address");
+        };
+        println!("DFN address: {}", get_dfn(pem)?)
+    }
     Ok(())
 }
 
 /// Returns the account id and the principal id if the private key was provided.
 fn get_public_ids(
     auth: &AuthInfo,
-    opts: PublicOpts,
+    opts: &PublicOpts,
 ) -> AnyhowResult<(Principal, AccountIdentifier)> {
-    match opts.principal_id {
+    match &opts.principal_id {
         Some(principal_id) => {
             let principal_id = Principal::from_text(principal_id)?;
             Ok((principal_id, get_account_id(principal_id)?))
@@ -42,6 +53,14 @@ fn get_public_ids(
     }
 }
 
+fn get_dfn(pem: &str) -> AnyhowResult<String> {
+    let pk = SecretKey::from_sec1_pem(pem).context("DFN addresses need a secp256k1 key")?;
+    let pubk = pk.public_key();
+    let uncompressed = pubk.to_encoded_point(false);
+    let hash = Keccak256::digest(&uncompressed.as_bytes()[1..]);
+    Ok(hex::encode(&hash[12..]))
+}
+
 /// Returns the account id and the principal id if the private key was provided.
 pub fn get_ids(auth: &AuthInfo) -> AnyhowResult<(Principal, AccountIdentifier)> {
     let principal_id = get_identity(auth)?.sender().map_err(|e| anyhow!(e))?;

tests/commands/public-ids-dfn.sh

@@ -0,0 +1 @@
+"$QUILL" public-ids --genesis-dfn --seed-file - <<<"fee tube anger harsh pipe pull since path erase hire ordinary display"

tests/outputs/public-ids-dfn.txt

@@ -0,0 +1,3 @@
+Principal id: ed6vu-jnldn-5wync-3xnlm-jzlg2-5kjds-iqbcj-5pjgi-jhbw3-qawnx-eae
+Account id: 2adf562a6232efe3a3934880edb092ae481651fc961a61d845797d762f437fbd
+DFN address: bfcc18caabb2b3ca17c50c0d3834e368c4e4b88f