Debug for Account

Derive prints the full userdata vec which is questionably useful.

Cargo.lock

@@ -727,6 +727,11 @@ dependencies = [
  "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "hex"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "hex-literal"
 version = "0.1.2"
@@ -2254,6 +2259,7 @@ dependencies = [
  "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "generic-array 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "ring 0.13.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.88 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2938,6 +2944,7 @@ dependencies = [
 "checksum globset 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4743617a7464bbda3c8aec8558ff2f9429047e025771037df561d383337ff865"
 "checksum h2 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)" = "30e0b8e55b4d7ffedade2b9605851f8e85f5010663e7ad170ef3c0f0681bc43f"
 "checksum hashbrown 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3bae29b6653b3412c2e71e9d486db9f9df5d701941d86683005efb9f2d28e3da"
+"checksum hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "805026a5d0141ffc30abb3be3173848ad46a1b1664fe632428479619a3644d77"
 "checksum hex-literal 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "ae0e5c30fb65e661a0e39860e37100dfbe4d39aff865e9357a6a4ed0b5bbf303"
 "checksum hex-literal-impl 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1d340b6514f232f6db1bd16db65302a5278a04fef9ce867cb932e7e5fa21130a"
 "checksum http 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)" = "1a10e5b573b9a0146545010f50772b9e8b1dd0a256564cc4307694c68832a2f5"

sdk/Cargo.toml

@@ -11,6 +11,7 @@ edition = "2018"
 [dependencies]
 bincode = "1.1.2"
 bs58 = "0.2.0"
+hex = "0.3.2"
 byteorder = "1.2.1"
 chrono = { version = "0.4.0", features = ["serde"] }
 generic-array = { version = "0.12.0", default-features = false, features = ["serde"] }

sdk/src/account.rs

@@ -1,8 +1,9 @@
 use crate::pubkey::Pubkey;
+use std::{cmp, fmt};
 
 /// An Account with userdata that is stored on chain
 #[repr(C)]
-#[derive(Serialize, Deserialize, Debug, Clone, Default, Eq, PartialEq)]
+#[derive(Serialize, Deserialize, Clone, Default, Eq, PartialEq)]
 pub struct Account {
     /// tokens in the account
     pub tokens: u64,
@@ -14,6 +15,29 @@ pub struct Account {
     pub executable: bool,
 }
 
+impl fmt::Debug for Account {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let userdata_len = cmp::min(64, self.userdata.len());
+        let userdata_str = if userdata_len > 0 {
+            format!(
+                " userdata: {}",
+                hex::encode(self.userdata[..userdata_len].to_vec())
+            )
+        } else {
+            "".to_string()
+        };
+        write!(
+            f,
+            "Account {{ tokens: {} userdata.len: {} owner: {} executable: {}{} }}",
+            self.tokens,
+            self.userdata.len(),
+            self.owner,
+            self.executable,
+            userdata_str,
+        )
+    }
+}
+
 impl Account {
     // TODO do we want to add executable and leader_owner even though they should always be false/default?
     pub fn new(tokens: u64, space: usize, owner: Pubkey) -> Account {