Updated the test_helpers to produce valid Writecaps.

crates/node/Cargo.toml

@@ -2,7 +2,7 @@
 name = "node"
 version = "0.1.0"
 authors = ["Matthew Carr <mdcarr941@gmail.com>"]
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

crates/node/src/crypto.rs

@@ -38,6 +38,21 @@ pub enum Error {
     Serde(serde_block_tree::Error),
 }
 
+impl Display for Error {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        match self {
+            Error::NoReadCap => write!(f, "no readcap"),
+            Error::NoKeyAvailable => write!(f, "no key available"),
+            Error::MissingPrivateKey => write!(f, "private key was missing"),
+            Error::KeyVariantUnsupported => write!(f, "unsupported key variant"),
+            Error::BlockNotEncrypted => write!(f, "block was not encrypted"),
+            Error::InvalidFormat => write!(f, "invalid format"),
+            Error::Message(message) => f.write_str(message.as_str()),
+            Error::Serde(serde_err) => serde_err.fmt(f),
+        }
+    }
+}
+
 impl From<ErrorStack> for Error {
     fn from(error: ErrorStack) -> Error {
         Error::Message(error.to_string())
@@ -152,6 +167,12 @@ impl Signature {
     }
 }
 
+impl Default for Signature {
+    fn default() -> Self {
+        Signature::Rsa([0; RSA_SIG_LEN])
+    }
+}
+
 /// Identifies a type of cryptographic key. The variants of this enum match those of `Key`.
 pub enum KeyId {
     // TODO: Write a macro to generate this from `Key`.
@@ -225,7 +246,7 @@ impl Key {
         }
     }
 
-    fn generate(id: KeyId) -> Result<Key> {
+    pub fn generate(id: KeyId) -> Result<Key> {
         match id {
             KeyId::Aes256Cbc => {
                 let mut key = [0; 32];
@@ -251,7 +272,7 @@ impl Key {
     }
 
     /// Hashes this key and returns the `Principal` it is for.
-    fn to_principal(&self) -> Principal {
+    pub fn to_principal(&self) -> Principal {
         let slice = match self {
             Key::Rsa { public, .. } => public.as_slice(),
             Key::Aes256Cbc { key, .. } => key,
@@ -533,7 +554,7 @@ pub(crate) fn sign_block(versioned_block: &mut VersionedBlock, write_cap: WriteC
     let sig_header = SigHeader::from(&*block);
     let header = to_vec(&sig_header)?;
     let mut sign_algo = SignAlgo::try_from(&block.write_cap.signing_key)?;
-    sign_algo.sign(std::array::IntoIter::new([header.as_slice(), body]))?;
+    sign_algo.sign([header.as_slice(), body].into_iter())?;
     block.signature = sign_algo.signature;
     Ok(())
 }
@@ -544,7 +565,7 @@ pub(crate) fn verify_block(versioned_block: &VersionedBlock) -> Result<bool> {
     let sig_header = SigHeader::from(&*block);
     let header = to_vec(&sig_header)?;
     let verify_algo = VerifyAlgo::try_from(&block.write_cap.signing_key)?;
-    let parts = std::array::IntoIter::new([header.as_slice(), body]);
+    let parts = [header.as_slice(), body].into_iter();
     if !verify_algo.verify(parts, block.signature.as_slice())? {
         return Ok(false);
     }
@@ -570,6 +591,14 @@ impl<'a> From<&'a WriteCap> for WriteCapSig<'a> {
     }
 }
 
+pub(crate) fn sign_writecap(write_cap: &mut WriteCap, key: &Key) -> Result<()> {
+    let mut sign_algo = SignAlgo::try_from(key)?;
+    let sig_input = to_vec(&WriteCapSig::from(&*write_cap))?;
+    sign_algo.sign([sig_input.as_slice()].into_iter())?;
+    write_cap.signature = sign_algo.signature;
+    Ok(())
+}
+
 /// Verifies that the given `WriteCap` actually grants permission to write to the given `Path`.
 fn verify_write_cap(mut write_cap: &WriteCap, path: &Path) -> Result<bool> {
     let mut prev: Option<&WriteCap> = None;
@@ -592,7 +621,7 @@ fn verify_write_cap(mut write_cap: &WriteCap, path: &Path) -> Result<bool> {
         write_to(&sig, &mut sig_input.as_mut_slice())?;
         let verify_algo = VerifyAlgo::try_from(&write_cap.signing_key)?;
         let valid = verify_algo.verify(
-            std::array::IntoIter::new([sig_input.as_slice()]), write_cap.signature.as_slice())?;
+            [sig_input.as_slice()].into_iter(), write_cap.signature.as_slice())?;
         if !valid {
             return Ok(false);
         }
@@ -680,11 +709,9 @@ mod tests {
         let header = b"About: lyrics".as_slice();
         let message = b"Everything that feels so good is bad bad bad.".as_slice();
         let mut signer = SignAlgo::try_from(&key)?;
-        let parts = std::array::IntoIter::new([header, message]);
-        signer.sign(parts)?;
+        signer.sign([header, message].into_iter())?;
         let verifier = VerifyAlgo::try_from(&key)?;
-        let parts = std::array::IntoIter::new([header, message]);
-        let verified = verifier.verify(parts, signer.signature.as_slice())?;
+        let verified = verifier.verify([header, message].into_iter(), signer.signature.as_slice())?;
         assert_eq!(true, verified);
         Ok(())
     }
@@ -709,21 +736,6 @@ mod tests {
         Ok(())
     }
 
-    #[test]
-    fn to_principal() {
-        let key = Key::Rsa {
-            public: Vec::from(RSA_KEY),
-            private: None,
-            padding: RsaPadding::Pkcs1,
-        };
-        let actual = key.to_principal();
-        let expected = Principal(Hash::Sha2_256([
-            85, 20, 110, 220, 18, 26, 1, 140, 86, 169, 1, 117, 52, 76, 250, 221, 61, 74, 19, 59,
-            131, 225, 180, 78, 252, 126, 230, 147, 76, 205, 219, 238
-        ]));
-        assert_eq!(expected, actual);
-    }
-
     #[test]
     fn hash_to_string() {
         let hash = make_principal().0;

crates/node/src/main.rs

@@ -7,7 +7,8 @@ use std::{
     convert::TryFrom,
     hash::Hash as Hashable,
     fmt::{self, Display, Formatter},
-    time::SystemTime,
+    time::{Duration, SystemTime},
+    ops::Add,
 };
 use serde::{Serialize, Deserialize};
 use serde_big_array::BigArray;
@@ -134,7 +135,7 @@ impl FragmentRecord {
 
 /// An identifier for a security principal, which is any entity that can be authenticated.
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Hashable, Clone)]
-struct Principal(Hash);
+pub struct Principal(Hash);
 
 /// An identifier for a block in a tree.
 #[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
@@ -296,6 +297,15 @@ impl Epoch {
     }
 }
 
+impl Copy for Epoch {}
+
+impl Add<Duration> for Epoch {
+    type Output = Self;
+    fn add(self, other: Duration) -> Self {
+        Epoch(self.0 + other.as_secs())
+    }
+}
+
 /// The serial number of a block fragment.
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Hashable)]
 struct FragmentSerial(u32);

crates/node/src/serde_tests.rs

@@ -45,7 +45,7 @@ fn roundtrip_fragment() -> Result<()> {
 
 #[test]
 fn roundtrip_write_cap() -> Result<()> {
-    let expected = make_write_cap()?;
+    let expected = make_writecap()?;
     let ser_result = to_vec(&expected);
     let de_result = from_vec(&ser_result?);
     assert_eq!(expected, de_result?);

crates/node/src/test_helpers.rs

@@ -1,8 +1,9 @@
 /// Test data and functions to help with testing.
 
 use super::*;
-use crypto::RsaPadding;
-use serde_block_tree::Result;
+use crypto::{ KeyId, RsaPadding };
+use serde_block_tree::{Error, Result};
+use std::{ fs::File, io::Write, fmt::Write as FmtWrite };
 
 pub const PRINCIPAL: [u8; 32] = [
     0x75, 0x28, 0xA9, 0xE0, 0x9D, 0x24, 0xBA, 0xB3, 0x79, 0x56, 0x15, 0x68, 0xFD, 0xA4, 0xE2, 0xA4,
@@ -65,42 +66,380 @@ pub const KEY: [u8; 32] = [
     0xBB, 0xF9, 0xFE, 0xD0, 0xC1, 0xF7, 0x90, 0x34, 0x69, 0xB7, 0xE7, 0xC6, 0x1C, 0x46, 0x85, 0x48,
 ];
 
-pub const RSA_KEY: [u8; 550] = [
-    0xEC, 0xB5, 0x31, 0xFB, 0xF7, 0x1B, 0x81, 0x55, 0x20, 0xF2, 0x4D, 0x09, 0xDC, 0x19, 0x37, 0x07,
-    0x08, 0x41, 0xB5, 0xC2, 0xDE, 0xF8, 0x33, 0xF9, 0x42, 0x79, 0xFF, 0x79, 0x4F, 0x45, 0x4F, 0x99,
-    0x3C, 0x80, 0xE7, 0x91, 0xC1, 0xA1, 0x6C, 0xB4, 0xBF, 0x1B, 0x64, 0xCE, 0xE6, 0xB4, 0x7D, 0xB8,
-    0x8A, 0x2E, 0xE6, 0x01, 0xE5, 0x83, 0xE8, 0xB5, 0x41, 0x21, 0x5B, 0xA6, 0x89, 0xDF, 0x72, 0xBF,
-    0xA8, 0x54, 0x6E, 0x9E, 0x16, 0xDD, 0x19, 0x07, 0x3D, 0xEF, 0xD2, 0x84, 0x05, 0x96, 0xAD, 0x06,
-    0xEC, 0x8C, 0x8F, 0x2B, 0xB5, 0xD9, 0x24, 0x8D, 0xCE, 0x85, 0xC6, 0x72, 0xA5, 0xCC, 0x7A, 0x53,
-    0x5E, 0x86, 0x47, 0x19, 0x15, 0xFC, 0x1F, 0x66, 0xDB, 0x15, 0x24, 0x90, 0x8C, 0x90, 0xBE, 0xA0,
-    0x6A, 0xED, 0x9F, 0x5E, 0x40, 0xD1, 0x08, 0xD0, 0x1B, 0x98, 0x5F, 0xD2, 0x73, 0x1A, 0x5A, 0x85,
-    0x78, 0x5E, 0x57, 0x01, 0xFE, 0x4E, 0xF9, 0xB2, 0x7B, 0x8B, 0x1D, 0xF0, 0xA1, 0xE6, 0xF2, 0xF6,
-    0xB8, 0x27, 0x91, 0xC1, 0xD4, 0x1A, 0xFF, 0xBE, 0x31, 0x05, 0xD7, 0x4D, 0x81, 0xC7, 0xA8, 0x52,
-    0x84, 0xB9, 0x24, 0x5C, 0x4C, 0x98, 0x3A, 0x77, 0xD1, 0x20, 0x9F, 0x3A, 0x72, 0x1D, 0xE2, 0xDB,
-    0xEE, 0x7E, 0xB1, 0x92, 0x91, 0x84, 0xB0, 0xE1, 0x3A, 0x1F, 0xC4, 0x15, 0xB9, 0x9F, 0x1E, 0xBC,
-    0x9D, 0x67, 0xED, 0xD5, 0x39, 0x45, 0x48, 0x7F, 0x15, 0x8D, 0xC5, 0xE0, 0x13, 0x16, 0x32, 0x74,
-    0xB2, 0x5A, 0xF8, 0x10, 0x0D, 0x59, 0xA8, 0xE8, 0xB9, 0xE4, 0xAA, 0xE0, 0x09, 0xDE, 0x4E, 0xA4,
-    0x7E, 0x98, 0x23, 0x65, 0xC1, 0xC9, 0xA2, 0x47, 0x26, 0x59, 0x48, 0xD4, 0x9D, 0x85, 0x75, 0x45,
-    0x7F, 0xFD, 0xCD, 0xE7, 0xC6, 0x81, 0x7F, 0xCC, 0xB5, 0x89, 0xA9, 0x1B, 0x6D, 0x3C, 0xFE, 0x64,
-    0x8B, 0xF4, 0xEE, 0xDD, 0xA2, 0xE0, 0x9A, 0xEF, 0x66, 0x17, 0x6E, 0x6B, 0x7F, 0xB8, 0x7A, 0x54,
-    0x9C, 0x38, 0xA1, 0xC5, 0xAD, 0x0C, 0xA0, 0x8E, 0x13, 0x46, 0x21, 0x07, 0x25, 0x3C, 0x7D, 0xDA,
-    0xD5, 0x62, 0x2E, 0xD4, 0x6E, 0x44, 0x76, 0xA3, 0xF2, 0x32, 0x8A, 0xDE, 0xC1, 0xE6, 0xB7, 0x7A,
-    0xCD, 0xDE, 0x25, 0x3D, 0x59, 0x8C, 0x1F, 0x12, 0xCB, 0x7F, 0xA5, 0x92, 0xC9, 0x65, 0x65, 0xC0,
-    0x3D, 0x09, 0x63, 0xBF, 0x92, 0x97, 0x52, 0xEF, 0xCA, 0x32, 0x9C, 0x51, 0xE8, 0x5F, 0x78, 0x06,
-    0x2F, 0x43, 0x79, 0xD9, 0xE8, 0x1B, 0x2A, 0xB1, 0x52, 0x33, 0xFD, 0x8C, 0x5F, 0x1E, 0x38, 0xC2,
-    0xA4, 0xEB, 0x3C, 0x92, 0x79, 0xAA, 0x6E, 0x95, 0x54, 0xE0, 0x77, 0x47, 0xC4, 0xC5, 0x6F, 0xE6,
-    0x14, 0x77, 0xC5, 0x2C, 0xDF, 0xBF, 0x7E, 0xB2, 0x39, 0x4C, 0x86, 0x1E, 0xD8, 0xAC, 0x03, 0x60,
-    0xB9, 0xA6, 0x44, 0x4F, 0x27, 0xEB, 0xCD, 0xCF, 0x12, 0x93, 0x61, 0x6F, 0xC5, 0x9B, 0xD4, 0x53,
-    0x88, 0x5E, 0x32, 0x21, 0xB2, 0xFA, 0x4E, 0xD1, 0x18, 0x26, 0x97, 0xCB, 0xBC, 0x3D, 0xD1, 0x0C,
-    0x8F, 0xBD, 0x3D, 0x47, 0xA2, 0x91, 0x53, 0x25, 0xCE, 0xB5, 0x3A, 0x72, 0x83, 0xD5, 0x79, 0xD5,
-    0x29, 0x46, 0x44, 0xE0, 0x31, 0xC5, 0x40, 0x04, 0xD6, 0xA5, 0xFB, 0x58, 0xC5, 0xBE, 0x4D, 0x01,
-    0x28, 0xE7, 0x9E, 0xF7, 0x8A, 0xF3, 0x76, 0x52, 0xC4, 0x34, 0x26, 0x25, 0x81, 0xF4, 0xC7, 0xA5,
-    0xE2, 0xA0, 0x3C, 0x68, 0x6F, 0x8B, 0xAF, 0xA2, 0x61, 0x5E, 0x1E, 0x1A, 0xA4, 0x9E, 0x38, 0x77,
-    0x09, 0xFB, 0x8D, 0x23, 0x52, 0x78, 0x9E, 0xAC, 0x1B, 0xEE, 0xAB, 0xBD, 0xF7, 0xE5, 0xA7, 0x03,
-    0xDB, 0x16, 0xB8, 0xE6, 0x63, 0x7C, 0x04, 0x7B, 0xDD, 0x06, 0xDC, 0xD1, 0xF8, 0x1B, 0xCB, 0xA1,
-    0x44, 0x1B, 0x45, 0x33, 0x04, 0x4B, 0xA2, 0x13, 0xA7, 0x27, 0x22, 0x05, 0x09, 0xDA, 0x5E, 0xE5,
-    0xE8, 0x1C, 0x4C, 0x7D, 0xAE, 0x09, 0x88, 0xA4, 0x77, 0x90, 0x15, 0xF0, 0xAA, 0xF7, 0x89, 0xD3,
-    0xD6, 0x50, 0xC0, 0x9A, 0x2F, 0x07,
+pub const ROOT_PUBLIC_KEY: [u8; 550] = [
+    0x30, 0x82, 0x02, 0x22, 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 
+    0x01, 0x05, 0x00, 0x03, 0x82, 0x02, 0x0F, 0x00, 0x30, 0x82, 0x02, 0x0A, 0x02, 0x82, 0x02, 0x01, 
+    0x00, 0xA4, 0x3E, 0xA9, 0xF6, 0x60, 0x73, 0x29, 0x9E, 0x75, 0xB4, 0x95, 0xAD, 0x2F, 0x8E, 0x93, 
+    0xD9, 0x9D, 0xB5, 0x46, 0x99, 0xD9, 0xA2, 0x2E, 0x3F, 0x93, 0xAB, 0xDB, 0x36, 0x2F, 0x37, 0xB7, 
+    0x8C, 0x2C, 0xD5, 0xC7, 0x25, 0x94, 0x11, 0x9D, 0xBD, 0x55, 0xAB, 0x89, 0x1C, 0x47, 0x66, 0xCD, 
+    0x4D, 0x5D, 0x48, 0x72, 0x4C, 0x15, 0xC9, 0x36, 0xCB, 0x40, 0x17, 0x05, 0x44, 0xCB, 0xE1, 0xE7, 
+    0x3C, 0xB7, 0xDD, 0xE0, 0x52, 0x9A, 0xE2, 0x3A, 0xF2, 0x33, 0x82, 0xB5, 0x75, 0xA0, 0x55, 0x51, 
+    0x9E, 0x11, 0x2D, 0x41, 0x11, 0xF7, 0x6A, 0x6F, 0xB3, 0x96, 0x93, 0x82, 0xC4, 0x18, 0xAD, 0x9F, 
+    0x45, 0x3C, 0x91, 0xC2, 0x3D, 0x1B, 0x77, 0xFE, 0x4E, 0xD5, 0xE0, 0x73, 0x85, 0xE0, 0x63, 0x1B, 
+    0x07, 0xED, 0x02, 0x0A, 0x5D, 0x6D, 0x93, 0x3D, 0x17, 0x13, 0xAA, 0x06, 0x86, 0xEF, 0xB7, 0x35, 
+    0x41, 0x0E, 0xE7, 0x60, 0x2B, 0x8F, 0xA6, 0x15, 0xC8, 0xA1, 0x7B, 0xA4, 0x01, 0x7E, 0x64, 0x51, 
+    0x87, 0x83, 0xBA, 0x9B, 0x29, 0x5C, 0xB0, 0x1C, 0xE9, 0x07, 0xC1, 0xB4, 0xE2, 0x61, 0x51, 0x74, 
+    0x3A, 0x4C, 0x22, 0xE9, 0xFA, 0xAC, 0x12, 0xC3, 0x71, 0x76, 0x7B, 0xFD, 0xA5, 0x15, 0x22, 0xC5, 
+    0xB3, 0x57, 0xDC, 0xD7, 0xC1, 0xA8, 0x7A, 0x5A, 0xCB, 0xD0, 0x7E, 0x27, 0xDF, 0x02, 0x32, 0x02, 
+    0xB9, 0xD6, 0x59, 0xC7, 0x68, 0x58, 0x2D, 0x54, 0x08, 0x20, 0x1D, 0x06, 0x7E, 0xC5, 0x61, 0x58, 
+    0x28, 0x2D, 0x0F, 0x1F, 0xBA, 0x75, 0xE5, 0xB7, 0x98, 0x73, 0x0F, 0x77, 0x60, 0x9C, 0x1F, 0x74, 
+    0xD6, 0x27, 0x7B, 0x6F, 0x68, 0x77, 0x5D, 0xC1, 0x91, 0x40, 0x09, 0x6E, 0xA7, 0xF8, 0xA7, 0x71, 
+    0x37, 0xA9, 0x82, 0xFB, 0xC6, 0x06, 0x80, 0xB7, 0xCB, 0x4B, 0x0A, 0x65, 0xD5, 0xC4, 0xDE, 0x7D, 
+    0x99, 0xCC, 0xE9, 0xDC, 0x06, 0x17, 0x69, 0xCD, 0x5F, 0x4B, 0x49, 0x6C, 0x39, 0x45, 0x5F, 0x37, 
+    0xE7, 0x0D, 0x0C, 0x50, 0xBC, 0xF9, 0x44, 0xAD, 0x9E, 0x6F, 0x3E, 0x40, 0x10, 0x1E, 0xF1, 0x97, 
+    0x59, 0xD3, 0x31, 0x74, 0x01, 0x51, 0xE9, 0x01, 0x59, 0x1C, 0x5B, 0x3A, 0x0B, 0xDE, 0x4C, 0xA2, 
+    0x3D, 0xB0, 0x53, 0xDC, 0x14, 0x42, 0x03, 0xE3, 0x29, 0x51, 0x9D, 0x06, 0x5F, 0x38, 0x36, 0xAE, 
+    0xE0, 0x42, 0xDB, 0x32, 0x62, 0x38, 0x13, 0x83, 0xC6, 0x62, 0x0F, 0xAA, 0x78, 0xF2, 0xE1, 0x46, 
+    0x12, 0x15, 0x58, 0x08, 0xB1, 0x42, 0x9B, 0x3E, 0xA5, 0x00, 0xF5, 0x3B, 0x6F, 0xD4, 0xB8, 0x50, 
+    0x3D, 0xCA, 0x42, 0x47, 0x03, 0x4E, 0x28, 0x6C, 0xE1, 0x3D, 0xEB, 0x83, 0x77, 0x58, 0x07, 0x13, 
+    0x82, 0x75, 0xBF, 0x0C, 0xC6, 0x26, 0xC5, 0x54, 0xF4, 0x53, 0x52, 0x84, 0x2B, 0xB1, 0xD4, 0x6F, 
+    0xFF, 0xC3, 0x08, 0xA7, 0x92, 0xED, 0x86, 0x1C, 0x2B, 0xB1, 0x76, 0x74, 0xA7, 0x43, 0xFC, 0x47, 
+    0x4F, 0x93, 0x30, 0xD5, 0x2D, 0xF0, 0x71, 0xA3, 0xE6, 0x3B, 0xBE, 0x8F, 0x0C, 0x36, 0x73, 0xBD, 
+    0xAD, 0xCC, 0x92, 0x73, 0xEA, 0xC5, 0xCD, 0x4B, 0x12, 0x47, 0x59, 0xD9, 0xBA, 0xA9, 0x67, 0x4A, 
+    0x4E, 0xD9, 0x6D, 0x45, 0x2A, 0xE6, 0x60, 0xEB, 0x4E, 0x8D, 0xA3, 0xC2, 0x1C, 0x46, 0x85, 0x35, 
+    0x33, 0x08, 0x64, 0x1F, 0x9C, 0xEE, 0xA0, 0x9C, 0x48, 0xB5, 0x8D, 0xD0, 0xFC, 0x4F, 0x5F, 0xA1, 
+    0x85, 0x52, 0x01, 0xD4, 0x2C, 0xA6, 0xE0, 0x63, 0xFC, 0xE1, 0x74, 0x8B, 0xBC, 0xC1, 0x88, 0x25, 
+    0x20, 0xDF, 0xB8, 0xAF, 0xE2, 0xA7, 0xEF, 0x2C, 0x1D, 0x29, 0x66, 0x3D, 0xC1, 0x75, 0x13, 0x3C, 
+    0xE1, 0x47, 0x59, 0xD5, 0x96, 0x8F, 0xA0, 0xBF, 0xEE, 0x86, 0xCC, 0xC6, 0xC8, 0xF3, 0x36, 0x58, 
+    0x93, 0x02, 0x03, 0x01, 0x00, 0x01, 
+];
+
+pub const ROOT_PRIVATE_KEY: [u8; 2348] = [
+    0x30, 0x82, 0x09, 0x28, 0x02, 0x01, 0x00, 0x02, 0x82, 0x02, 0x01, 0x00, 0xA4, 0x3E, 0xA9, 0xF6, 
+    0x60, 0x73, 0x29, 0x9E, 0x75, 0xB4, 0x95, 0xAD, 0x2F, 0x8E, 0x93, 0xD9, 0x9D, 0xB5, 0x46, 0x99, 
+    0xD9, 0xA2, 0x2E, 0x3F, 0x93, 0xAB, 0xDB, 0x36, 0x2F, 0x37, 0xB7, 0x8C, 0x2C, 0xD5, 0xC7, 0x25, 
+    0x94, 0x11, 0x9D, 0xBD, 0x55, 0xAB, 0x89, 0x1C, 0x47, 0x66, 0xCD, 0x4D, 0x5D, 0x48, 0x72, 0x4C, 
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+    0xD5, 0x35, 0xC1, 0x02, 0x82, 0x01, 0x01, 0x00, 0x8D, 0x47, 0xAF, 0xA5, 0x2C, 0x78, 0x20, 0x99, 
+    0x68, 0xEA, 0x4C, 0x39, 0xFC, 0xFC, 0x1D, 0x86, 0xC7, 0xFA, 0x01, 0x8A, 0xCC, 0x38, 0x89, 0x5F, 
+    0xC9, 0xB9, 0x76, 0x25, 0x19, 0x38, 0x0F, 0xE8, 0xB9, 0xC6, 0xCB, 0xAB, 0xDF, 0xB1, 0xED, 0x7C, 
+    0x4C, 0x94, 0x65, 0x27, 0xFB, 0x15, 0x8A, 0x1D, 0x40, 0xA5, 0xF1, 0x53, 0x67, 0x84, 0x18, 0x7A, 
+    0xF9, 0xD9, 0x8A, 0xB6, 0xA5, 0x73, 0xEE, 0x17, 0xEA, 0x20, 0x74, 0xE6, 0x52, 0xCC, 0xA5, 0xFA, 
+    0x79, 0x47, 0xCC, 0x87, 0x57, 0x6E, 0xA8, 0x9C, 0x3D, 0xF2, 0x26, 0xF2, 0xE6, 0xBD, 0xB7, 0xC9, 
+    0x9C, 0x97, 0xF5, 0x3D, 0xED, 0xA2, 0xA7, 0xD8, 0xB0, 0x47, 0x7F, 0xE1, 0x88, 0x72, 0xE6, 0x2D, 
+    0xB8, 0x24, 0x67, 0xDB, 0xD7, 0xF8, 0x3B, 0xB9, 0x5A, 0x5A, 0x9D, 0x7C, 0x4E, 0xAA, 0x32, 0xDA, 
+    0x87, 0x9E, 0xE7, 0xD5, 0x30, 0xCD, 0xBB, 0x36, 0x04, 0xE6, 0x34, 0xC2, 0xB1, 0xBB, 0x6B, 0xE9, 
+    0xE4, 0xC0, 0x07, 0x91, 0x59, 0x51, 0xDB, 0xCE, 0xC1, 0x16, 0xD5, 0x44, 0x52, 0xAA, 0x22, 0x12, 
+    0x4B, 0xB8, 0x8A, 0xD6, 0xB0, 0x1C, 0x1B, 0x43, 0xD7, 0x3B, 0x6D, 0x53, 0x8B, 0xE0, 0xD0, 0x01, 
+    0xD6, 0x15, 0x72, 0xD2, 0x74, 0xDE, 0xF8, 0xD1, 0x46, 0x92, 0x0B, 0xEC, 0x1D, 0xB7, 0xFA, 0xAB, 
+    0x18, 0x5F, 0x94, 0x75, 0x99, 0x99, 0x15, 0x89, 0xF2, 0xEB, 0x68, 0x0C, 0x39, 0xA8, 0xFA, 0xB4, 
+    0x83, 0x95, 0xA8, 0x41, 0xB7, 0x31, 0xA4, 0x72, 0x5C, 0x38, 0x80, 0xF4, 0x35, 0x1F, 0x24, 0x48, 
+    0x1D, 0x48, 0x22, 0x96, 0x81, 0xCE, 0x8D, 0x76, 0x43, 0x38, 0xD5, 0x72, 0x4A, 0x68, 0x27, 0x91, 
+    0x08, 0xF8, 0x4D, 0x33, 0xDE, 0x9A, 0x8D, 0x28, 0x58, 0x0F, 0x3C, 0x68, 0xEA, 0x95, 0x3F, 0xF1, 
+    0xB0, 0x05, 0x6B, 0xFF, 0x04, 0x48, 0x6F, 0x99, 0x02, 0x82, 0x01, 0x00, 0x65, 0x8F, 0x41, 0x86, 
+    0x2E, 0x9A, 0x75, 0x7A, 0x96, 0x3F, 0x63, 0x69, 0x4B, 0xF9, 0xAB, 0x71, 0x79, 0xAB, 0x70, 0x2A, 
+    0x3B, 0xB7, 0x47, 0xEA, 0x53, 0x73, 0xAA, 0x21, 0x2F, 0x34, 0xE4, 0x29, 0x07, 0xD8, 0x68, 0x53, 
+    0xD1, 0x76, 0x91, 0x46, 0xC9, 0xF8, 0xAA, 0x25, 0x22, 0x54, 0x66, 0xF3, 0x0C, 0x05, 0x86, 0x94, 
+    0x65, 0x4F, 0xFB, 0x11, 0x8B, 0x1B, 0x3E, 0xF9, 0x7B, 0xF0, 0x63, 0xC6, 0x84, 0xEA, 0x40, 0xE8, 
+    0xB3, 0x8D, 0x1C, 0x99, 0x19, 0x5B, 0xD4, 0xC8, 0x48, 0x6B, 0x36, 0xBF, 0x66, 0xD3, 0x1E, 0xE2, 
+    0x04, 0x18, 0x06, 0xF5, 0x4E, 0x8E, 0xC7, 0xD6, 0x87, 0x4A, 0xD7, 0x58, 0x7F, 0x83, 0x16, 0xA9, 
+    0x40, 0x92, 0x7B, 0x9F, 0x1A, 0x86, 0x7B, 0x7C, 0xF9, 0x12, 0x46, 0xBF, 0x71, 0xE1, 0xB9, 0x38, 
+    0x59, 0x2F, 0xBA, 0x27, 0x88, 0xDA, 0xF8, 0x73, 0x35, 0x5A, 0x32, 0x18, 0xB5, 0xBB, 0xE5, 0x19, 
+    0x0F, 0x65, 0xC9, 0x93, 0x01, 0x9B, 0x96, 0x59, 0x31, 0x51, 0x23, 0xE0, 0x57, 0xE5, 0xD1, 0x63, 
+    0xE4, 0x0E, 0x0C, 0x21, 0x6C, 0x46, 0xF6, 0x7E, 0xD6, 0x45, 0xC5, 0xF2, 0x3C, 0x93, 0xFB, 0x64, 
+    0xD5, 0x6B, 0xF5, 0x66, 0x12, 0xBF, 0x47, 0xFD, 0x00, 0x4E, 0xA0, 0x7E, 0xCE, 0x96, 0x75, 0xE4, 
+    0xCB, 0xF1, 0x58, 0xD9, 0x0A, 0x4F, 0xC1, 0x05, 0x53, 0x77, 0xBD, 0x7A, 0x04, 0x82, 0x4E, 0x7E, 
+    0xC3, 0x37, 0x89, 0x25, 0x80, 0xC1, 0x19, 0x42, 0x90, 0x21, 0xD3, 0x53, 0xD0, 0x60, 0x1A, 0xF4, 
+    0xC1, 0xF4, 0x6D, 0xFD, 0xF4, 0xA7, 0xE8, 0x8E, 0xE8, 0x20, 0x70, 0xC4, 0xD1, 0x43, 0xFA, 0x39, 
+    0x30, 0xBB, 0x45, 0xD2, 0xA2, 0xC1, 0x9C, 0xDE, 0x44, 0xEF, 0x35, 0xFB, 0x09, 0xCA, 0xB0, 0x4F, 
+    0x7D, 0x1B, 0x4C, 0xB8, 0x60, 0x17, 0x1C, 0x38, 0xB1, 0xA1, 0x64, 0x92, 
+];
+
+pub const NODE_PUBLIC_KEY: [u8; 550] = [
+    0x30, 0x82, 0x02, 0x22, 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 
+    0x01, 0x05, 0x00, 0x03, 0x82, 0x02, 0x0F, 0x00, 0x30, 0x82, 0x02, 0x0A, 0x02, 0x82, 0x02, 0x01, 
+    0x00, 0xB7, 0xFF, 0xBF, 0x35, 0x21, 0xB3, 0xC1, 0xBB, 0x8F, 0x3B, 0x83, 0x9B, 0x9E, 0x3B, 0x2E, 
+    0x47, 0xDC, 0x67, 0xDA, 0xF7, 0x90, 0x1C, 0x37, 0x32, 0x7C, 0xC8, 0x8A, 0x90, 0xD3, 0x1F, 0x43, 
+    0x83, 0x3E, 0x96, 0xCF, 0x03, 0x8B, 0x0B, 0xE6, 0xBB, 0x97, 0xB9, 0xC4, 0x2E, 0xBF, 0xF3, 0xC1, 
+    0xAB, 0xC8, 0x9E, 0x97, 0xC3, 0xEE, 0x7D, 0x4C, 0xB2, 0x8E, 0x56, 0x16, 0xA4, 0xBD, 0x66, 0x9B, 
+    0xF7, 0x44, 0x2A, 0x19, 0x22, 0xA1, 0x1C, 0x87, 0x4B, 0xF8, 0x4B, 0x73, 0x89, 0xC7, 0x9E, 0xBE, 
+    0x09, 0x1C, 0x37, 0x68, 0xAE, 0x1A, 0x42, 0x74, 0x1D, 0xB4, 0x15, 0xA2, 0x59, 0xC1, 0x6D, 0xB6, 
+    0x24, 0xEC, 0x8A, 0x20, 0x53, 0x24, 0x53, 0x48, 0xE8, 0x10, 0x94, 0x7F, 0xBA, 0xDD, 0xE7, 0x9F, 
+    0x8D, 0xEB, 0xC0, 0x93, 0x26, 0x74, 0x7C, 0xC8, 0x8B, 0xA0, 0x6D, 0x2B, 0x8B, 0x04, 0x9D, 0x2F, 
+    0xDF, 0x0A, 0x83, 0x72, 0x25, 0x06, 0x89, 0xC7, 0xD4, 0x27, 0xBF, 0x99, 0x8F, 0xF3, 0x2D, 0xA6, 
+    0x9B, 0xF2, 0x78, 0x8C, 0xDA, 0x2E, 0x8D, 0xAC, 0x94, 0xCB, 0xA7, 0xFD, 0xCD, 0x39, 0x09, 0xE4, 
+    0xC3, 0x22, 0x59, 0xC4, 0xAC, 0x80, 0x84, 0x56, 0x55, 0xA8, 0xE7, 0x7C, 0x70, 0x37, 0x9C, 0x5B, 
+    0x46, 0x3A, 0xDF, 0xD8, 0x3A, 0xA3, 0x67, 0x98, 0x96, 0xC5, 0x90, 0x56, 0x7C, 0x67, 0xE2, 0xFE, 
+    0x1A, 0xD0, 0x80, 0xE2, 0x8B, 0xF5, 0x6C, 0x75, 0x16, 0x77, 0xDF, 0x5B, 0x76, 0x36, 0xA9, 0xC9, 
+    0xC9, 0xB9, 0xC4, 0x04, 0xF1, 0x8A, 0xB9, 0xBC, 0xA8, 0x16, 0x41, 0xC5, 0x54, 0xA7, 0x51, 0xF3, 
+    0x2A, 0x39, 0x80, 0x55, 0x6A, 0xB2, 0xBF, 0x29, 0xD0, 0x40, 0x9E, 0x2A, 0x59, 0xA9, 0xEB, 0xA8, 
+    0xBF, 0x32, 0x3F, 0x54, 0x10, 0x45, 0x1B, 0x64, 0x3B, 0x15, 0x26, 0x2C, 0x37, 0xB3, 0xA0, 0x9E, 
+    0xE9, 0xAB, 0x55, 0x34, 0x82, 0xD5, 0xA8, 0xF0, 0x7C, 0xC5, 0x1B, 0xA1, 0x30, 0x75, 0x2D, 0x9D, 
+    0xB3, 0xEC, 0xF7, 0xE6, 0x54, 0x4B, 0xE8, 0xBB, 0x59, 0xFB, 0xD4, 0x35, 0xA3, 0x7F, 0xA2, 0xF6, 
+    0x95, 0x9F, 0x7F, 0x65, 0x41, 0x4F, 0x58, 0x1E, 0x92, 0xA4, 0x43, 0x4A, 0x66, 0xB6, 0xB6, 0x3D, 
+    0x6B, 0x85, 0xAE, 0x7D, 0x2A, 0x82, 0xD1, 0xB3, 0xBD, 0xF1, 0x4A, 0x4B, 0x90, 0x86, 0x56, 0x41, 
+    0x39, 0x2F, 0x97, 0x7F, 0x78, 0xCE, 0x59, 0x7A, 0xD5, 0x40, 0xDB, 0x0D, 0x5F, 0x44, 0x69, 0xBC, 
+    0xA0, 0xDF, 0xEC, 0x3E, 0x83, 0xAB, 0x9A, 0xAA, 0x46, 0xAE, 0xD0, 0x8D, 0x67, 0x9C, 0x47, 0x3B, 
+    0xFA, 0xD1, 0x90, 0xD9, 0x1B, 0x48, 0x43, 0xED, 0x1E, 0xEE, 0x0A, 0x25, 0x46, 0xDE, 0xFE, 0x8C, 
+    0x1A, 0xDA, 0xA5, 0xAD, 0xC8, 0x4F, 0x33, 0x3B, 0x93, 0x48, 0x10, 0xD9, 0xF8, 0xA4, 0xC0, 0x68, 
+    0x45, 0x71, 0x85, 0x1D, 0xCA, 0xC8, 0x5A, 0xDC, 0x02, 0x6A, 0x62, 0x0E, 0x80, 0xBC, 0xAD, 0x53, 
+    0xE3, 0x26, 0x1F, 0x5B, 0xE8, 0x4F, 0x37, 0xA9, 0x7F, 0x36, 0xDF, 0x3B, 0x35, 0x8D, 0xF6, 0x34, 
+    0x9F, 0xB3, 0x84, 0xC3, 0x1E, 0xA8, 0xD2, 0x0E, 0x0F, 0x13, 0x1E, 0xEB, 0xD1, 0x2C, 0x9F, 0x84, 
+    0x3E, 0x62, 0xF4, 0x07, 0x8A, 0x6E, 0xC8, 0x56, 0xA1, 0xB0, 0x42, 0xF7, 0x0B, 0xF9, 0xD7, 0x36, 
+    0x22, 0xE2, 0xB2, 0x44, 0xA7, 0x3E, 0x4D, 0x9E, 0x6B, 0x3C, 0x8B, 0x2E, 0xEC, 0x13, 0x21, 0x3A, 
+    0xBA, 0x3E, 0x4B, 0x98, 0x5F, 0x6B, 0x8B, 0x5F, 0x90, 0x05, 0x11, 0x7D, 0xE9, 0xF3, 0x3A, 0xBD, 
+    0x0A, 0xAE, 0x49, 0x6E, 0xA6, 0x3C, 0x4E, 0xF0, 0xFA, 0xF1, 0xDE, 0xEF, 0xDC, 0x20, 0xC4, 0x2F, 
+    0xD1, 0x61, 0x3B, 0xAF, 0xA4, 0xE2, 0x92, 0x2B, 0xF3, 0x6B, 0x17, 0xAD, 0x95, 0x11, 0x4C, 0x90, 
+    0x5F, 0x02, 0x03, 0x01, 0x00, 0x01, 
+];
+
+pub const NODE_PRIVATE_KEY: [u8; 2349] = [
+    0x30, 0x82, 0x09, 0x29, 0x02, 0x01, 0x00, 0x02, 0x82, 0x02, 0x01, 0x00, 0xB7, 0xFF, 0xBF, 0x35, 
+    0x21, 0xB3, 0xC1, 0xBB, 0x8F, 0x3B, 0x83, 0x9B, 0x9E, 0x3B, 0x2E, 0x47, 0xDC, 0x67, 0xDA, 0xF7, 
+    0x90, 0x1C, 0x37, 0x32, 0x7C, 0xC8, 0x8A, 0x90, 0xD3, 0x1F, 0x43, 0x83, 0x3E, 0x96, 0xCF, 0x03, 
+    0x8B, 0x0B, 0xE6, 0xBB, 0x97, 0xB9, 0xC4, 0x2E, 0xBF, 0xF3, 0xC1, 0xAB, 0xC8, 0x9E, 0x97, 0xC3, 
+    0xEE, 0x7D, 0x4C, 0xB2, 0x8E, 0x56, 0x16, 0xA4, 0xBD, 0x66, 0x9B, 0xF7, 0x44, 0x2A, 0x19, 0x22, 
+    0xA1, 0x1C, 0x87, 0x4B, 0xF8, 0x4B, 0x73, 0x89, 0xC7, 0x9E, 0xBE, 0x09, 0x1C, 0x37, 0x68, 0xAE, 
+    0x1A, 0x42, 0x74, 0x1D, 0xB4, 0x15, 0xA2, 0x59, 0xC1, 0x6D, 0xB6, 0x24, 0xEC, 0x8A, 0x20, 0x53, 
+    0x24, 0x53, 0x48, 0xE8, 0x10, 0x94, 0x7F, 0xBA, 0xDD, 0xE7, 0x9F, 0x8D, 0xEB, 0xC0, 0x93, 0x26, 
+    0x74, 0x7C, 0xC8, 0x8B, 0xA0, 0x6D, 0x2B, 0x8B, 0x04, 0x9D, 0x2F, 0xDF, 0x0A, 0x83, 0x72, 0x25, 
+    0x06, 0x89, 0xC7, 0xD4, 0x27, 0xBF, 0x99, 0x8F, 0xF3, 0x2D, 0xA6, 0x9B, 0xF2, 0x78, 0x8C, 0xDA, 
+    0x2E, 0x8D, 0xAC, 0x94, 0xCB, 0xA7, 0xFD, 0xCD, 0x39, 0x09, 0xE4, 0xC3, 0x22, 0x59, 0xC4, 0xAC, 
+    0x80, 0x84, 0x56, 0x55, 0xA8, 0xE7, 0x7C, 0x70, 0x37, 0x9C, 0x5B, 0x46, 0x3A, 0xDF, 0xD8, 0x3A, 
+    0xA3, 0x67, 0x98, 0x96, 0xC5, 0x90, 0x56, 0x7C, 0x67, 0xE2, 0xFE, 0x1A, 0xD0, 0x80, 0xE2, 0x8B, 
+    0xF5, 0x6C, 0x75, 0x16, 0x77, 0xDF, 0x5B, 0x76, 0x36, 0xA9, 0xC9, 0xC9, 0xB9, 0xC4, 0x04, 0xF1, 
+    0x8A, 0xB9, 0xBC, 0xA8, 0x16, 0x41, 0xC5, 0x54, 0xA7, 0x51, 0xF3, 0x2A, 0x39, 0x80, 0x55, 0x6A, 
+    0xB2, 0xBF, 0x29, 0xD0, 0x40, 0x9E, 0x2A, 0x59, 0xA9, 0xEB, 0xA8, 0xBF, 0x32, 0x3F, 0x54, 0x10, 
+    0x45, 0x1B, 0x64, 0x3B, 0x15, 0x26, 0x2C, 0x37, 0xB3, 0xA0, 0x9E, 0xE9, 0xAB, 0x55, 0x34, 0x82, 
+    0xD5, 0xA8, 0xF0, 0x7C, 0xC5, 0x1B, 0xA1, 0x30, 0x75, 0x2D, 0x9D, 0xB3, 0xEC, 0xF7, 0xE6, 0x54, 
+    0x4B, 0xE8, 0xBB, 0x59, 0xFB, 0xD4, 0x35, 0xA3, 0x7F, 0xA2, 0xF6, 0x95, 0x9F, 0x7F, 0x65, 0x41, 
+    0x4F, 0x58, 0x1E, 0x92, 0xA4, 0x43, 0x4A, 0x66, 0xB6, 0xB6, 0x3D, 0x6B, 0x85, 0xAE, 0x7D, 0x2A, 
+    0x82, 0xD1, 0xB3, 0xBD, 0xF1, 0x4A, 0x4B, 0x90, 0x86, 0x56, 0x41, 0x39, 0x2F, 0x97, 0x7F, 0x78, 
+    0xCE, 0x59, 0x7A, 0xD5, 0x40, 0xDB, 0x0D, 0x5F, 0x44, 0x69, 0xBC, 0xA0, 0xDF, 0xEC, 0x3E, 0x83, 
+    0xAB, 0x9A, 0xAA, 0x46, 0xAE, 0xD0, 0x8D, 0x67, 0x9C, 0x47, 0x3B, 0xFA, 0xD1, 0x90, 0xD9, 0x1B, 
+    0x48, 0x43, 0xED, 0x1E, 0xEE, 0x0A, 0x25, 0x46, 0xDE, 0xFE, 0x8C, 0x1A, 0xDA, 0xA5, 0xAD, 0xC8, 
+    0x4F, 0x33, 0x3B, 0x93, 0x48, 0x10, 0xD9, 0xF8, 0xA4, 0xC0, 0x68, 0x45, 0x71, 0x85, 0x1D, 0xCA, 
+    0xC8, 0x5A, 0xDC, 0x02, 0x6A, 0x62, 0x0E, 0x80, 0xBC, 0xAD, 0x53, 0xE3, 0x26, 0x1F, 0x5B, 0xE8, 
+    0x4F, 0x37, 0xA9, 0x7F, 0x36, 0xDF, 0x3B, 0x35, 0x8D, 0xF6, 0x34, 0x9F, 0xB3, 0x84, 0xC3, 0x1E, 
+    0xA8, 0xD2, 0x0E, 0x0F, 0x13, 0x1E, 0xEB, 0xD1, 0x2C, 0x9F, 0x84, 0x3E, 0x62, 0xF4, 0x07, 0x8A, 
+    0x6E, 0xC8, 0x56, 0xA1, 0xB0, 0x42, 0xF7, 0x0B, 0xF9, 0xD7, 0x36, 0x22, 0xE2, 0xB2, 0x44, 0xA7, 
+    0x3E, 0x4D, 0x9E, 0x6B, 0x3C, 0x8B, 0x2E, 0xEC, 0x13, 0x21, 0x3A, 0xBA, 0x3E, 0x4B, 0x98, 0x5F, 
+    0x6B, 0x8B, 0x5F, 0x90, 0x05, 0x11, 0x7D, 0xE9, 0xF3, 0x3A, 0xBD, 0x0A, 0xAE, 0x49, 0x6E, 0xA6, 
+    0x3C, 0x4E, 0xF0, 0xFA, 0xF1, 0xDE, 0xEF, 0xDC, 0x20, 0xC4, 0x2F, 0xD1, 0x61, 0x3B, 0xAF, 0xA4, 
+    0xE2, 0x92, 0x2B, 0xF3, 0x6B, 0x17, 0xAD, 0x95, 0x11, 0x4C, 0x90, 0x5F, 0x02, 0x03, 0x01, 0x00, 
+    0x01, 0x02, 0x82, 0x02, 0x01, 0x00, 0xA2, 0x95, 0x3C, 0x2A, 0x41, 0x96, 0x69, 0xA8, 0x46, 0x9E, 
+    0xEA, 0xE2, 0xB6, 0x05, 0x4B, 0x16, 0xBA, 0x5D, 0x96, 0x71, 0x4C, 0x08, 0x72, 0x89, 0x8D, 0x13, 
+    0x52, 0xC5, 0x37, 0x98, 0x17, 0x7A, 0xBF, 0xF2, 0x58, 0x07, 0xA4, 0x74, 0xA6, 0xB3, 0xBA, 0x14, 
+    0xAE, 0x92, 0x34, 0x90, 0xB9, 0xE0, 0x05, 0xCC, 0x85, 0x03, 0xDF, 0x17, 0x1E, 0x8F, 0x64, 0x10, 
+    0x13, 0xC0, 0x0B, 0x8F, 0xC0, 0x5E, 0xD3, 0xFF, 0x72, 0xE8, 0x53, 0x7E, 0x36, 0xDA, 0xDD, 0x12, 
+    0x26, 0x8C, 0x67, 0x34, 0x10, 0x6D, 0x52, 0x5E, 0x6F, 0x83, 0xEF, 0xB6, 0x2A, 0x8E, 0x18, 0x93, 
+    0x49, 0x3A, 0x90, 0x1D, 0x56, 0x65, 0xF8, 0x10, 0xF1, 0x11, 0x26, 0x36, 0xE5, 0x64, 0x11, 0x4A, 
+    0x76, 0x36, 0xF3, 0x5F, 0x78, 0x6F, 0xDA, 0x11, 0xF6, 0xB4, 0x73, 0x17, 0xD3, 0xC8, 0xF4, 0xBF, 
+    0xA2, 0x4B, 0x1B, 0x8F, 0x9D, 0x3E, 0x33, 0x37, 0x04, 0xC4, 0x4C, 0xAB, 0xB0, 0x43, 0xF9, 0xBF, 
+    0x66, 0x7C, 0x78, 0xFF, 0x2C, 0x89, 0xFD, 0xCD, 0xA1, 0x80, 0x24, 0xC4, 0x90, 0xEB, 0x85, 0xAC, 
+    0xF2, 0x29, 0xC5, 0xAD, 0xC5, 0x52, 0xDB, 0x66, 0x80, 0xCF, 0x80, 0x5B, 0xEF, 0x41, 0x8F, 0x96, 
+    0xC4, 0x31, 0x10, 0x22, 0x7B, 0xD0, 0x69, 0xB3, 0x63, 0x88, 0x24, 0xDD, 0x24, 0x4A, 0x8D, 0x55, 
+    0xC5, 0xE5, 0xF5, 0x91, 0xF0, 0xC0, 0x56, 0xDE, 0x9B, 0xCF, 0xD9, 0xD3, 0xB4, 0xFE, 0x5E, 0x7B, 
+    0xA1, 0x80, 0xAA, 0x3A, 0x8B, 0x10, 0x51, 0xB2, 0x30, 0x40, 0x12, 0x39, 0x9E, 0xC6, 0xD3, 0xAB, 
+    0xD8, 0x26, 0xBE, 0x16, 0x3E, 0x8C, 0x5F, 0xF4, 0xD3, 0x05, 0x0D, 0xDE, 0xB6, 0x9E, 0xCA, 0x8A, 
+    0x37, 0x97, 0xB4, 0xFA, 0x83, 0xC8, 0x36, 0x29, 0x19, 0x29, 0xAB, 0x36, 0xD1, 0xF1, 0x16, 0xF5, 
+    0xFC, 0xFA, 0x57, 0x21, 0xA5, 0x68, 0x0A, 0x7F, 0x84, 0x0B, 0xF6, 0x95, 0xCA, 0x88, 0x2B, 0x74, 
+    0x42, 0x76, 0xD4, 0xB3, 0xC4, 0x29, 0x16, 0x4A, 0xB9, 0x65, 0x2B, 0xCD, 0x46, 0x52, 0x89, 0xF0, 
+    0x0F, 0x8F, 0x0E, 0xFB, 0x61, 0xE2, 0xC1, 0x50, 0xFD, 0xBD, 0x59, 0xEC, 0x55, 0xDC, 0x5E, 0xF1, 
+    0x9F, 0x2A, 0x94, 0x14, 0x5D, 0xDB, 0x58, 0xCB, 0xE8, 0x10, 0x8C, 0x00, 0xED, 0x5D, 0x93, 0xAA, 
+    0x91, 0xB4, 0xBB, 0xB3, 0xCB, 0x55, 0xF9, 0x27, 0x70, 0x23, 0x94, 0xE2, 0x23, 0x56, 0x04, 0xA2, 
+    0xDC, 0xFC, 0xAA, 0x6A, 0x98, 0xDE, 0xBC, 0xE4, 0x4B, 0x2B, 0xAE, 0xD8, 0x65, 0xF8, 0x27, 0xD8, 
+    0x78, 0xE4, 0x57, 0x7C, 0xF0, 0xB1, 0x0D, 0xB2, 0x80, 0x0F, 0x3A, 0xCE, 0xC1, 0xB9, 0xA9, 0xCA, 
+    0xD5, 0x74, 0xFB, 0x1F, 0xE2, 0x49, 0x28, 0xC3, 0x52, 0xAB, 0xB4, 0x38, 0xDD, 0xDC, 0x6A, 0x88, 
+    0xD6, 0xA5, 0xCE, 0x08, 0x64, 0xB1, 0x75, 0x01, 0x8A, 0xCB, 0xEC, 0x8C, 0x57, 0x53, 0x5B, 0xD2, 
+    0x8D, 0x90, 0xE8, 0x29, 0xA3, 0xFC, 0x5F, 0x50, 0x7A, 0xFC, 0x26, 0xB8, 0xA9, 0x9F, 0x39, 0x94, 
+    0xDD, 0xFE, 0x12, 0x84, 0x3A, 0x0A, 0x64, 0x81, 0x11, 0x0A, 0x37, 0xD1, 0x8D, 0xBD, 0xBD, 0x53, 
+    0x5F, 0xC2, 0xD1, 0x13, 0x69, 0xD2, 0xA9, 0xA7, 0xA9, 0xFE, 0xF6, 0x88, 0xEF, 0xBC, 0x65, 0xFF, 
+    0x81, 0xEA, 0x57, 0x5B, 0x45, 0xEB, 0x52, 0xFD, 0x54, 0xAA, 0x75, 0x8F, 0x4B, 0x01, 0x83, 0xB2, 
+    0x12, 0x2A, 0x9D, 0x79, 0xE0, 0x57, 0x07, 0x9C, 0x65, 0x79, 0x1D, 0x12, 0x7B, 0x10, 0x41, 0x99, 
+    0x65, 0x63, 0x14, 0xED, 0x0C, 0x80, 0x0F, 0x74, 0x83, 0x0E, 0xED, 0x79, 0x33, 0x9A, 0x12, 0x96, 
+    0x62, 0x39, 0x6F, 0xD3, 0x57, 0x30, 0x97, 0x77, 0xCB, 0x2A, 0xE0, 0xA5, 0x30, 0x42, 0xCE, 0xDF, 
+    0xDD, 0x31, 0xD5, 0xCF, 0x49, 0xD9, 0x02, 0x82, 0x01, 0x01, 0x00, 0xDF, 0xB2, 0xC5, 0x6B, 0xBE, 
+    0x77, 0x50, 0x8E, 0x84, 0xB5, 0xA8, 0x6E, 0x24, 0x81, 0xE1, 0x5C, 0x25, 0x9F, 0x79, 0x27, 0xD4, 
+    0x61, 0xC3, 0xA1, 0xCD, 0xBD, 0xAE, 0xB0, 0xBD, 0xA3, 0xBA, 0x95, 0x2E, 0x59, 0x00, 0x88, 0xE5, 
+    0x47, 0x83, 0x18, 0xAA, 0xE9, 0x1A, 0x72, 0xCE, 0xA2, 0x65, 0x82, 0xCB, 0xEC, 0xDB, 0x84, 0xA3, 
+    0xED, 0x28, 0x66, 0xED, 0x91, 0xDD, 0xFE, 0xC0, 0x10, 0x3E, 0xC0, 0x28, 0xE0, 0x2A, 0x25, 0x91, 
+    0x29, 0x5D, 0xFD, 0x2E, 0x6F, 0xFF, 0x5A, 0x6D, 0x9D, 0x6A, 0x7B, 0x0F, 0x8A, 0x0F, 0x99, 0x07, 
+    0x79, 0x54, 0x9E, 0xF5, 0xE5, 0x97, 0xE8, 0xD9, 0x39, 0xDC, 0x43, 0xC6, 0x24, 0xCF, 0xA2, 0x30, 
+    0xAE, 0xA2, 0xC1, 0x5E, 0xEA, 0x5F, 0x75, 0x28, 0xA9, 0x4B, 0x75, 0xBF, 0x41, 0xEA, 0x27, 0xFD, 
+    0x7D, 0xD7, 0x87, 0x2D, 0x3D, 0xEF, 0x76, 0x69, 0x1B, 0x34, 0x57, 0x2C, 0x09, 0xC5, 0xA8, 0x11, 
+    0x7E, 0x20, 0x71, 0x05, 0x0A, 0x0D, 0xAD, 0xC1, 0xF1, 0x8B, 0x6A, 0x9E, 0x26, 0xF3, 0xDC, 0x10, 
+    0x5A, 0x1B, 0x0A, 0x15, 0x1E, 0xC2, 0xDC, 0xB4, 0x93, 0xF9, 0xA3, 0xE6, 0xD9, 0x0D, 0x79, 0x12, 
+    0xCB, 0x52, 0xFE, 0x89, 0x05, 0x3C, 0xCA, 0xA5, 0x1A, 0xBE, 0x4F, 0x0E, 0x82, 0x00, 0xAF, 0x18, 
+    0x67, 0x87, 0xBD, 0x65, 0x8B, 0xED, 0x78, 0xA6, 0x4F, 0x13, 0xFF, 0xF7, 0xB4, 0x9F, 0xAA, 0x08, 
+    0xDD, 0x4D, 0xEA, 0x90, 0x94, 0x11, 0xE6, 0xE6, 0x93, 0xF3, 0x1A, 0xEB, 0xA3, 0x44, 0x2D, 0x28, 
+    0xE6, 0xBF, 0xD9, 0xCC, 0xB3, 0xD5, 0x09, 0x71, 0xFB, 0x64, 0x75, 0x1F, 0xAD, 0x59, 0x81, 0xB6, 
+    0xC2, 0x32, 0x3D, 0xB8, 0x43, 0xB7, 0xBA, 0xD2, 0x8E, 0xA2, 0x80, 0xB5, 0xFE, 0x25, 0x60, 0x29, 
+    0xD2, 0x06, 0x3B, 0xEA, 0xE9, 0xEC, 0xB2, 0xF1, 0x03, 0xEF, 0x6D, 0x02, 0x82, 0x01, 0x01, 0x00, 
+    0xD2, 0x91, 0x73, 0x96, 0xA0, 0x37, 0x26, 0x6E, 0x78, 0x6E, 0xFF, 0xCB, 0xE3, 0xC2, 0x55, 0xC8, 
+    0x59, 0xBE, 0x3C, 0xBB, 0x58, 0x10, 0x1B, 0x61, 0xDE, 0x5A, 0x63, 0x37, 0x09, 0xB9, 0xCE, 0xB2, 
+    0xD6, 0xF1, 0x5B, 0x92, 0x86, 0x96, 0xBB, 0xB3, 0x50, 0xF0, 0xB3, 0x0B, 0x4F, 0x0D, 0xE1, 0x4F, 
+    0x0E, 0xE4, 0xE2, 0x08, 0xAA, 0x32, 0x10, 0x87, 0xA2, 0x31, 0xAE, 0xBA, 0xC9, 0xC9, 0x1E, 0x95, 
+    0xCF, 0xD5, 0xDC, 0x8F, 0x41, 0x36, 0x48, 0x75, 0x50, 0x1F, 0x8C, 0xE5, 0x5A, 0x53, 0xB0, 0xF1, 
+    0xC0, 0x8B, 0x3E, 0x23, 0x22, 0x30, 0xFD, 0x3C, 0xF6, 0x69, 0x6B, 0x64, 0x74, 0xF7, 0xB8, 0x69, 
+    0x9D, 0x23, 0xDB, 0x3E, 0x02, 0x79, 0x68, 0x16, 0xAD, 0xE2, 0xC1, 0xB8, 0xD4, 0x6E, 0x10, 0x73, 
+    0x31, 0x3C, 0x1C, 0xDB, 0xC9, 0x8C, 0x2E, 0x2F, 0x12, 0x2D, 0x02, 0x7B, 0xE1, 0xBE, 0x97, 0xA1, 
+    0xD2, 0x16, 0x68, 0x19, 0xE9, 0x3E, 0x7E, 0x45, 0x7D, 0xC5, 0xEA, 0x01, 0xB8, 0x93, 0x2C, 0x72, 
+    0x0F, 0xF1, 0x9B, 0x24, 0xED, 0x84, 0x19, 0xFC, 0x2F, 0x28, 0xD5, 0x07, 0x25, 0xBC, 0xBA, 0xA6, 
+    0xC9, 0x55, 0xE2, 0x14, 0x0C, 0x23, 0xED, 0x5A, 0x80, 0x9B, 0xC7, 0xEC, 0x15, 0xD5, 0x8B, 0x76, 
+    0x28, 0xF5, 0x0F, 0x09, 0x6A, 0xAF, 0xFB, 0x73, 0x84, 0x0C, 0x3F, 0x51, 0xA7, 0xB8, 0xCA, 0x84, 
+    0xF2, 0xB0, 0x56, 0x17, 0xE0, 0xC5, 0x04, 0x7E, 0x53, 0x5D, 0xEB, 0x03, 0xA9, 0xE9, 0xA9, 0x1A, 
+    0xB1, 0x40, 0x1A, 0xFC, 0x44, 0x7E, 0x22, 0xEB, 0x92, 0x2E, 0xEF, 0xE2, 0x91, 0x66, 0x74, 0x4F, 
+    0x7F, 0x5F, 0x92, 0xE4, 0x8D, 0x27, 0x22, 0x60, 0x73, 0x65, 0x80, 0xF9, 0xC5, 0x4C, 0xD9, 0x64, 
+    0x49, 0x02, 0x95, 0x1C, 0x09, 0xDD, 0xC1, 0xFE, 0x77, 0x4F, 0xEB, 0xC4, 0x05, 0x5B, 0x43, 0x7B, 
+    0x02, 0x82, 0x01, 0x00, 0x54, 0xD7, 0x60, 0xB8, 0xF4, 0x8C, 0x1C, 0x29, 0x71, 0x7B, 0xD4, 0x5D, 
+    0xB1, 0xCA, 0xF0, 0xC6, 0x1A, 0x1E, 0xD9, 0xBC, 0x99, 0x78, 0x5A, 0xD2, 0x4B, 0x4D, 0xDD, 0xAB, 
+    0x7A, 0xC1, 0x56, 0x4A, 0xAE, 0x41, 0x63, 0x4A, 0x88, 0x6B, 0x0E, 0xF5, 0x94, 0x1C, 0xC4, 0xC3, 
+    0x36, 0x4B, 0xB1, 0x64, 0x62, 0x23, 0x7B, 0x3E, 0x5B, 0x4D, 0xDF, 0x3C, 0xEA, 0x6D, 0xA0, 0x5C, 
+    0xB6, 0x4B, 0x73, 0x01, 0x3E, 0x7F, 0x86, 0x7C, 0xA9, 0x09, 0x9F, 0x74, 0x1E, 0xE0, 0xAB, 0x60, 
+    0x88, 0xA2, 0x63, 0x78, 0x38, 0xF4, 0x8B, 0xE5, 0xE6, 0x47, 0xC6, 0x28, 0x63, 0xEA, 0xA8, 0x2A, 
+    0xCF, 0xF8, 0x79, 0xE9, 0xDA, 0x84, 0xAB, 0x9B, 0x40, 0x0B, 0x7B, 0xFF, 0x0B, 0x18, 0xA9, 0x0B, 
+    0xAE, 0x58, 0x47, 0x1E, 0x69, 0x63, 0x7E, 0x83, 0x9C, 0x48, 0xD6, 0x2D, 0x96, 0xA3, 0x1E, 0xE7, 
+    0x32, 0x05, 0xF7, 0x5B, 0xF8, 0x7F, 0xDC, 0x4F, 0x5A, 0x13, 0x14, 0x0A, 0xC9, 0x76, 0x7E, 0xA9, 
+    0xA0, 0x1D, 0x14, 0x5B, 0x63, 0x90, 0x32, 0x7D, 0x0C, 0x56, 0xA0, 0x5A, 0xBA, 0x97, 0xE8, 0x1F, 
+    0xFC, 0xFD, 0x02, 0x79, 0x7F, 0x5C, 0x63, 0x17, 0xC0, 0x61, 0x0D, 0x21, 0x2C, 0xA6, 0xA7, 0xDF, 
+    0xD3, 0xAE, 0xC8, 0xEF, 0x02, 0xF9, 0x9B, 0x78, 0xCD, 0x30, 0xB6, 0xF2, 0xC6, 0x48, 0xC3, 0xD0, 
+    0x36, 0x83, 0x57, 0x7A, 0x85, 0x60, 0x24, 0x0E, 0x41, 0x3E, 0x6E, 0x06, 0xC0, 0xBE, 0xE7, 0xEB, 
+    0x43, 0x18, 0x69, 0xE3, 0x93, 0xEB, 0x60, 0x38, 0x20, 0x83, 0x23, 0xD0, 0x5F, 0x2A, 0xF5, 0x69, 
+    0x97, 0xA9, 0x58, 0xF8, 0x73, 0x03, 0x34, 0x27, 0x56, 0x41, 0x60, 0xFC, 0xB7, 0x9E, 0x37, 0x58, 
+    0xCB, 0xF2, 0xFC, 0xFF, 0x04, 0x07, 0x57, 0xF5, 0x98, 0xE6, 0xE7, 0x26, 0x62, 0x7A, 0x46, 0x23, 
+    0xB7, 0xF5, 0x5E, 0x21, 0x02, 0x82, 0x01, 0x01, 0x00, 0xCF, 0x14, 0x32, 0x0B, 0x88, 0xC6, 0x93, 
+    0xEA, 0x02, 0x50, 0x8F, 0x09, 0x31, 0x94, 0xD5, 0x8D, 0xF2, 0x0B, 0xEF, 0x68, 0x02, 0xA3, 0xDC, 
+    0x79, 0xF4, 0x15, 0x0A, 0x0B, 0x7F, 0x6A, 0x16, 0xC7, 0xB4, 0x30, 0xAA, 0x70, 0xC0, 0x21, 0x8E, 
+    0xB8, 0x3B, 0x3A, 0x6B, 0xAA, 0x0C, 0x75, 0xC7, 0x05, 0x5B, 0xCD, 0x66, 0x29, 0x45, 0x4F, 0x75, 
+    0x08, 0x1E, 0x4F, 0x23, 0xDA, 0x18, 0x45, 0xCC, 0xE9, 0x61, 0xFA, 0x9D, 0x2C, 0xD8, 0xE2, 0x0C, 
+    0x82, 0x2A, 0x68, 0xCC, 0xC4, 0x65, 0x7F, 0x76, 0xBD, 0x59, 0x30, 0xD6, 0xCB, 0xF0, 0x7D, 0x23, 
+    0x1E, 0x87, 0xEA, 0x86, 0xAD, 0xC5, 0x86, 0x34, 0xFA, 0xD0, 0x8A, 0x09, 0xBB, 0xC2, 0xED, 0x28, 
+    0x9B, 0x5D, 0x28, 0x6A, 0x81, 0x5D, 0x90, 0x5C, 0x67, 0x1C, 0x9D, 0x54, 0x78, 0x25, 0x8E, 0xD1, 
+    0x80, 0x83, 0x2C, 0x76, 0x8B, 0xE4, 0x26, 0xEE, 0xB2, 0x3A, 0x8C, 0xC4, 0x95, 0xEE, 0xD7, 0x01, 
+    0x91, 0x4F, 0xAE, 0x8A, 0x82, 0x64, 0xC5, 0x7F, 0xE9, 0x30, 0x9A, 0xD7, 0x8B, 0x8A, 0x75, 0xE6, 
+    0xA4, 0x26, 0xB0, 0xCE, 0x47, 0x78, 0x2A, 0x51, 0x99, 0x62, 0xD9, 0x2E, 0x3B, 0xAE, 0xF0, 0xCA, 
+    0x24, 0xBD, 0xE3, 0xF5, 0xC9, 0xCC, 0x73, 0x34, 0xF2, 0xE0, 0x36, 0x98, 0x32, 0x17, 0x94, 0xB8, 
+    0x02, 0x13, 0x73, 0x83, 0xF5, 0xC6, 0xAF, 0x29, 0xA3, 0x73, 0x94, 0x4D, 0x26, 0xB0, 0x6A, 0xB1, 
+    0x0F, 0x96, 0xE6, 0xFF, 0x0F, 0x9C, 0x52, 0xE9, 0x76, 0x11, 0xA8, 0xCC, 0xA1, 0x18, 0xAE, 0xBF, 
+    0xA2, 0xD2, 0x21, 0x8C, 0xD2, 0x51, 0x51, 0xE3, 0xC2, 0xA6, 0xAE, 0x14, 0x24, 0xE6, 0x57, 0xFD, 
+    0x2B, 0xC3, 0x70, 0xA8, 0x55, 0x7A, 0x5E, 0x28, 0x50, 0xC2, 0xA8, 0x62, 0x81, 0xAF, 0x86, 0x41, 
+    0x99, 0x02, 0x37, 0x3B, 0xD2, 0x8B, 0xBE, 0x03, 0xEF, 0x02, 0x82, 0x01, 0x00, 0x45, 0x6D, 0xA8, 
+    0xD3, 0xA8, 0x9B, 0x2C, 0x91, 0x48, 0xEF, 0x3E, 0x27, 0xF8, 0x48, 0xEE, 0xB7, 0x90, 0xF7, 0xFD, 
+    0xAB, 0x03, 0x40, 0xF8, 0xE6, 0xB5, 0x72, 0xC7, 0x2B, 0x82, 0xCE, 0xC5, 0xFB, 0x52, 0x0A, 0x8C, 
+    0xEF, 0x1D, 0x04, 0x01, 0x4D, 0xA4, 0x16, 0x29, 0x99, 0xAE, 0x5B, 0xAE, 0xDC, 0x80, 0xF2, 0x00, 
+    0xA0, 0xE2, 0xEB, 0x90, 0x01, 0x99, 0x23, 0x3C, 0xAF, 0xAA, 0x97, 0xA5, 0x1C, 0x9F, 0x37, 0x6E, 
+    0x3E, 0xAB, 0xED, 0xAD, 0xF6, 0xB3, 0x79, 0x78, 0x4E, 0x6D, 0xFA, 0x96, 0x72, 0xC3, 0xD1, 0xC3, 
+    0x1B, 0xE0, 0xB4, 0xF8, 0x67, 0x01, 0xC1, 0xDC, 0x6E, 0xC0, 0x3C, 0xE1, 0xB7, 0xDB, 0x7F, 0x4F, 
+    0x86, 0xA3, 0x27, 0x41, 0xAB, 0x23, 0x70, 0x94, 0xBC, 0x2F, 0xE5, 0xEF, 0x6B, 0xB1, 0x74, 0x70, 
+    0xF4, 0x82, 0x76, 0xEB, 0x12, 0x90, 0x99, 0x74, 0xAF, 0xCA, 0x41, 0x27, 0x24, 0xC8, 0x41, 0xFA, 
+    0x80, 0x34, 0xE6, 0x32, 0xD2, 0x5A, 0xD9, 0x24, 0x7C, 0x12, 0xD9, 0x6C, 0x42, 0x38, 0xEE, 0xD8, 
+    0x4A, 0xEB, 0x79, 0x49, 0x1C, 0x76, 0xD6, 0xA5, 0x26, 0x16, 0xD7, 0xED, 0xC1, 0xED, 0xC7, 0x0C, 
+    0xA1, 0xA5, 0x61, 0xD8, 0xA0, 0x03, 0x11, 0x6C, 0x74, 0x54, 0x5B, 0x2B, 0x07, 0x29, 0x3C, 0x29, 
+    0xC4, 0x3E, 0xEA, 0x54, 0x9B, 0xCA, 0xB8, 0xEE, 0xB3, 0xFF, 0x10, 0x35, 0x96, 0x9A, 0x21, 0xBE, 
+    0x8D, 0xD6, 0x7B, 0x6C, 0x0D, 0xA1, 0x8D, 0xFD, 0xA8, 0xEF, 0x5D, 0xB5, 0x5B, 0x48, 0xF5, 0x1D, 
+    0x52, 0xD3, 0x88, 0x45, 0x4D, 0xF9, 0x3F, 0xC4, 0x38, 0x2E, 0x00, 0xF4, 0xCA, 0xF3, 0x3C, 0xDB, 
+    0x30, 0x74, 0x1A, 0x28, 0x5F, 0x04, 0x14, 0xFB, 0xA5, 0xC8, 0x04, 0x60, 0x5A, 0x47, 0x51, 0x7F, 
+    0x1A, 0xEC, 0x3F, 0x4E, 0xA4, 0x2E, 0xA5, 0xFC, 0xF0, 0xE3, 0x82, 0x5C, 0x3B, 
 ];
 
 pub const BLOCK_KEY: [u8; 32] = [
@@ -127,8 +466,7 @@ pub(crate) fn make_principal() -> Principal {
     Principal(Hash::Sha2_256(PRINCIPAL))
 }
 
-pub(crate) fn make_path(rel_components: Vec<&str>) -> Path {
-    let owner = make_principal();
+pub(crate) fn make_path_with_owner(owner: Principal, rel_components: Vec<&str>) -> Path {
     let mut components = Vec::with_capacity(rel_components.len() + 1);
     components.push(owner.0.to_string());
     for component in rel_components {
@@ -137,26 +475,70 @@ pub(crate) fn make_path(rel_components: Vec<&str>) -> Path {
     Path { owner, components }
 }
 
-pub(crate) fn make_write_cap() -> Result<WriteCap> {
-    Ok(WriteCap {
-        issued_to: Principal(Hash::Sha2_256(PRINCIPAL)),
-        path: make_path(vec!["contacts", "emergency"]),
-        expires: Epoch(1649904316),
-        signing_key: Key::Rsa {
-            public: Vec::from(RSA_KEY), private: None, padding: RsaPadding::Pkcs1
-        },
-        signature: Signature::Rsa(SIGNATURE),
-        next: Some(Box::from(WriteCap {
-            issued_to: Principal(Hash::Sha2_256(PRINCIPAL)),
-            path: make_path(vec!["contacts"]),
-            expires: Epoch(1649994316),
-            signing_key: Key::Rsa {
-                public: Vec::from(RSA_KEY), private: None, padding: RsaPadding::Pkcs1
-            },
-            signature: Signature::Rsa(SIGNATURE),
-            next: None,
-        }))
-    })
+pub(crate) fn make_path(rel_components: Vec<&str>) -> Path {
+    make_path_with_owner(make_principal(), rel_components)
+}
+
+pub(crate) fn make_writecap() -> Result<WriteCap> {
+    let (root_writecap, root_key) = make_self_signed_writecap()?;
+    let public_key = Key::Rsa {
+        public: Vec::from(NODE_PUBLIC_KEY),
+        private: None,
+        padding: RsaPadding::Pkcs1,
+    };
+    make_writecap_trusted_by(
+        root_writecap, &root_key, &public_key, vec!["contacts", "emergency"])
+}
+
+pub(crate) fn make_writecap_trusted_by(
+    next: WriteCap, signing_key: &Key, public_key: &Key, path_components: Vec<&str>
+) -> Result<WriteCap> {
+    let hour_hence = Epoch::now() + Duration::from_secs(3600);
+    let mut signing_public_key = signing_key.clone();
+    match &mut signing_public_key {
+        Key::Rsa { private, .. } => private.take(),
+        _ => return Err(Error::Message("unexpected key type".to_string())),
+    };
+    let mut writecap = WriteCap {
+        issued_to: public_key.to_principal(),
+        path: make_path_with_owner(next.path.owner.clone(), path_components),
+        expires: hour_hence,
+        signing_key: signing_public_key,
+        signature: Signature::default(),
+        next: Some(Box::from(next)),
+    };
+    crypto::sign_writecap(&mut writecap, signing_key).map_err(|e| Error::Message(e.to_string()))?;
+    Ok(writecap)
+}
+
+pub(crate) fn make_self_signed_writecap() -> Result<(WriteCap, Key)> {
+    let private_key = Key::Rsa {
+        public: Vec::from(ROOT_PUBLIC_KEY),
+        private: Some(Vec::from(ROOT_PRIVATE_KEY)),
+        padding: RsaPadding::Pkcs1,
+    };
+    Ok((make_self_signed_writecap_with(&private_key)?, private_key))
+}
+
+pub(crate) fn make_self_signed_writecap_with(private_key: &Key) -> Result<WriteCap> {
+    let mut public_key = private_key.clone();
+    match &mut public_key {
+        Key::Rsa { private, .. } => private.take(),
+        _ => return Err(Error::Message("unexpected key type".to_string())),
+    };
+    let root_principal = public_key.to_principal();
+    let hour_hence = Epoch::now() + Duration::from_secs(3600);
+    let mut write_cap = WriteCap {
+        issued_to: root_principal.clone(),
+        path: make_path_with_owner(root_principal, vec![]),
+        expires: hour_hence,
+        signing_key: public_key,
+        signature: Signature::default(),
+        next: None,
+    };
+    crypto::sign_writecap(&mut write_cap, &private_key)
+        .map_err(|e| Error::Message(e.to_string()))?;
+    Ok(write_cap)
 }
 
 pub(crate) fn make_read_cap() -> ReadCap {
@@ -171,7 +553,7 @@ pub(crate) fn make_block() -> Result<Block> {
         let read_cap = make_read_cap();
         read_caps.insert(read_cap.issued_to, read_cap.key);
     }
-    let write_cap = make_write_cap()?;
+    let write_cap = make_writecap()?;
     Ok(Block {
         path: make_path(vec!["apps", "verse"]),
         read_caps,
@@ -179,4 +561,62 @@ pub(crate) fn make_block() -> Result<Block> {
         body: Cryptotext::Plain(Vec::from(PAYLOAD)),
         signature: Signature::Rsa(SIGNATURE)
     })
+}
+
+/// This function can be run as a test to write a new RSA key pair, as two Rust arrays,
+/// out to a file.
+fn write_test_keys() -> Result<()> {
+    write_rsa_keys_to_file("test_keys.rs")
+}
+
+struct NamedSlice<'a> {
+    name: &'a str,
+    slice: &'a [u8],
+}
+
+impl<'a> NamedSlice<'a> {
+    fn new(name: &'a str, slice: &'a [u8]) -> NamedSlice<'a> {
+        NamedSlice { name, slice }
+    }
+}
+
+fn write_rsa_keys_to_file(path: &str) -> Result<()> {
+    let key = Key::generate(KeyId::Rsa).map_err(|e| Error::Message(e.to_string()))?;
+    let (public, private) = match key {
+        Key::Rsa { public, private, .. } => (public, private.unwrap()),
+        _ => return Err(Error::Message("unexpected key type".to_string())),
+    };
+    let slices = [
+        NamedSlice::new("PUBLIC", public.as_slice()),
+        NamedSlice::new("PRIVATE", private.as_slice())
+    ];
+    write_to_file(path, slices.into_iter())
+}
+
+fn write_to_file<'a, I: Iterator<Item = NamedSlice<'a>>>(path: &str, slices: I) -> Result<()> {
+    let path = std::path::Path::new(path);
+    let mut file = File::create(path).map_err(Error::Io)?;
+    for NamedSlice { name, slice } in slices {
+        write_slice(&mut file, name, slice)?;
+    }
+    Ok(())
+}
+
+fn write_slice<W: Write>(output: &mut W, name: &str, slice: &[u8]) -> Result<()> {
+    const LINE_LEN: usize = 100;
+    let mut line = String::with_capacity(LINE_LEN);
+    write!(line, "    ").map_err(Error::Format)?;
+    writeln!(output, "pub const {}: [u8; {}] = [", name, slice.len()).map_err(Error::Io)?;
+    for byte in slice {
+        if line.len() + 6 > LINE_LEN {
+            writeln!(output, "{}", line).map_err(Error::Io)?;
+            line.clear();
+            write!(line, "    ").map_err(Error::Format)?;
+        }
+        write!(line, "0x{:02X?}, ", byte).map_err(Error::Format)?;
+    }
+    writeln!(output, "{}", line).map_err(Error::Io)?;
+    writeln!(output, "];").map_err(Error::Io)?;
+    writeln!(output).map_err(Error::Io)?;
+    Ok(())
 }

crates/serde-block-tree/src/error.rs

@@ -13,7 +13,8 @@ pub enum Error {
     TooManyVariants(u32),
     TypeConversion,
     NotSupported(&'static str),
-    InvalidUtf8Char
+    InvalidUtf8Char,
+    Format(std::fmt::Error)
 }
 
 impl std::error::Error for Error {}
@@ -34,7 +35,8 @@ impl Display for Error {
             Error::TypeConversion => formatter.write_str("type conversion failed"),
             Error::NotSupported(message) => formatter.write_fmt(format_args!(
                 "Operation is not supported: {}", message)),
-            Error::InvalidUtf8Char => formatter.write_str("Invalid UTF-8 character encountered.")
+            Error::InvalidUtf8Char => formatter.write_str("Invalid UTF-8 character encountered."),
+            Error::Format(fmt_error) => fmt_error.fmt(formatter),
         }
     }
 }