Introduce automatic ABI maintenance mechanism (2/2; rollout) (#8012)

* Introduce automatic ABI maintenance mechanism (2/2; rollout)

* Fix stable clippy

* Change to symlink

* Freeze abi of Tower

* fmt...

* Improve dev-experience!

* Update BankSlotDelta

$ diff -u /tmp/abi8/*7dg6BreYxTuxiVz6aLvk3p2Z7GQk2cJqfGvC9h4FAoSj* /tmp/abi8/*9chBcbXVJ4fK7uGgydQzam5aHipaAKFw6V4LDFpjbE4w*
--- /tmp/abi8/bank__BankSlotDelta_frozen_abi__test_abi_digest_7dg6BreYxTuxiVz6aLvk3p2Z7GQk2cJqfGvC9h4FAoSj      2020-06-18 18:01:22.831228087 +0900
+++ /tmp/abi8/bank__BankSlotDelta_frozen_abi__test_abi_digest_9chBcbXVJ4fK7uGgydQzam5aHipaAKFw6V4LDFpjbE4w      2020-07-03 15:59:58.430695244 +0900
@@ -140,7 +140,7 @@
                                                         field u8
                                                             primitive u8
                                                         field solana_sdk::instruction::InstructionError
-                                                            enum InstructionError (variants = 34)
+                                                            enum InstructionError (variants = 35)
                                                                 variant(0) GenericError (unit)
                                                                 variant(1) InvalidArgument (unit)
                                                                 variant(2) InvalidInstructionData (unit)
@@ -176,6 +176,7 @@
                                                                 variant(31) CallDepth (unit)
                                                                 variant(32) MissingAccount (unit)
                                                                 variant(33) ReentrancyNotAllowed (unit)
+                                                                variant(34) MaxSeedLengthExceeded (unit)
                                                     variant(9) CallChainTooDeep (unit)
                                                     variant(10) MissingSignatureForFee (unit)
                                                     variant(11) InvalidAccountIndex (unit)

* Fix some merge conflicts...

programs/vote/Cargo.toml

@@ -15,10 +15,15 @@ num-derive = "0.3"
 num-traits = "0.2"
 serde = "1.0.112"
 serde_derive = "1.0.103"
+solana-logger = { path = "../../logger", version = "1.3.0" }
 solana-metrics = { path = "../../metrics", version = "1.3.0" }
 solana-sdk = { path = "../../sdk", version = "1.3.0" }
+solana-sdk-macro-frozen-abi = { path = "../../sdk/macro-frozen-abi", version = "1.3.0" }
 thiserror = "1.0"
 
+[build-dependencies]
+rustc_version = "0.2"
+
 [lib]
 crate-type = ["lib"]
 name = "solana_vote_program"

programs/vote/build.rs

@@ -0,0 +1 @@
+../../sdk/build.rs

programs/vote/src/authorized_voters.rs

@@ -3,7 +3,7 @@ use serde_derive::{Deserialize, Serialize};
 use solana_sdk::{clock::Epoch, pubkey::Pubkey};
 use std::collections::BTreeMap;
 
-#[derive(Debug, Default, Serialize, Deserialize, PartialEq, Eq, Clone)]
+#[derive(Debug, Default, Serialize, Deserialize, PartialEq, Eq, Clone, AbiExample)]
 pub struct AuthorizedVoters {
     authorized_voters: BTreeMap<Epoch, Pubkey>,
 }

programs/vote/src/lib.rs

@@ -1,3 +1,5 @@
+#![cfg_attr(RUSTC_WITH_SPECIALIZATION, feature(specialization))]
+
 pub mod authorized_voters;
 pub mod vote_instruction;
 pub mod vote_state;
@@ -6,4 +8,7 @@ pub mod vote_transaction;
 #[macro_use]
 extern crate solana_metrics;
 
+#[macro_use]
+extern crate solana_sdk_macro_frozen_abi;
+
 solana_sdk::declare_id!("Vote111111111111111111111111111111111111111");

programs/vote/src/vote_state/mod.rs

@@ -36,7 +36,8 @@ pub const MAX_EPOCH_CREDITS_HISTORY: usize = 64;
 // defaults, intended to limit block time drift to < 1hr
 pub const TIMESTAMP_SLOT_INTERVAL: u64 = 4500;
 
-#[derive(Serialize, Default, Deserialize, Debug, PartialEq, Eq, Clone)]
+#[frozen_abi(digest = "69hYtmmcuqPbhpc64ZaNJDidaUcg66CW6wzPFiuYZ3To")]
+#[derive(Serialize, Default, Deserialize, Debug, PartialEq, Eq, Clone, AbiExample)]
 pub struct Vote {
     /// A stack of votes starting with the oldest vote
     pub slots: Vec<Slot>,
@@ -60,7 +61,7 @@ impl Vote {
     }
 }
 
-#[derive(Serialize, Default, Deserialize, Debug, PartialEq, Eq, Clone)]
+#[derive(Serialize, Default, Deserialize, Debug, PartialEq, Eq, Clone, AbiExample)]
 pub struct Lockout {
     pub slot: Slot,
     pub confirmation_count: u32,
@@ -103,7 +104,7 @@ pub enum VoteAuthorize {
     Withdrawer,
 }
 
-#[derive(Debug, Default, Serialize, Deserialize, PartialEq, Eq, Clone)]
+#[derive(Debug, Default, Serialize, Deserialize, PartialEq, Eq, Clone, AbiExample)]
 pub struct BlockTimestamp {
     pub slot: Slot,
     pub timestamp: UnixTimestamp,
@@ -112,7 +113,7 @@ pub struct BlockTimestamp {
 // this is how many epochs a voter can be remembered for slashing
 const MAX_ITEMS: usize = 32;
 
-#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone)]
+#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone, AbiExample)]
 pub struct CircBuf<I> {
     buf: [I; MAX_ITEMS],
     /// next pointer
@@ -153,7 +154,8 @@ impl<I> CircBuf<I> {
     }
 }
 
-#[derive(Debug, Default, Serialize, Deserialize, PartialEq, Eq, Clone)]
+#[frozen_abi(digest = "H7z93iz4PiRJqahQ9G1aJXao1huusBz47SA5WfP8g4yd")]
+#[derive(Debug, Default, Serialize, Deserialize, PartialEq, Eq, Clone, AbiExample)]
 pub struct VoteState {
     /// the node that votes in this account
     pub node_pubkey: Pubkey,