Implement JSON-RPC method for staking

Cargo.toml

@@ -35,6 +35,7 @@ lazy_static = "1.4.0"
 log = "0.4.8"
 num-format = "0.4.0"
 prettytable-rs = { version = "0.10.0", default-features = false }
+qrcode = "0.12"
 sentry = { version = "0.29.3", features = ["log"], optional = true }
 serde_json = "1.0.47"
 structopt = "0.3.9"

config/src/defaults.rs

@@ -486,6 +486,13 @@ pub const PSEUDO_CONSENSUS_CONSTANTS_WIP0022_REWARD_COLLATERAL_RATIO: u64 = 125;
 // TODO: modify the value directly in ConsensusConstants
 pub const PSEUDO_CONSENSUS_CONSTANTS_WIP0027_COLLATERAL_AGE: u32 = 13440;
 
+/// Maximum weight units that a block can devote to `StakeTransaction`s.
+pub const PSEUDO_CONSENSUS_CONSTANTS_POS_MAX_STAKE_BLOCK_WEIGHT: u32 = 10_000_000;
+
+/// Minimum amount of nanoWits that a `StakeTransaction` can add, and minimum amount that can be
+/// left in stake by an `UnstakeTransaction`.
+pub const PSEUDO_CONSENSUS_CONSTANTS_POS_MIN_STAKE_NANOWITS: u64 = 10_000_000_000_000;
+
 /// Struct that will implement all the development defaults
 pub struct Development;
 

data_structures/Cargo.toml

@@ -51,3 +51,7 @@ rand_distr = "0.4.3"
 [[bench]]
 name = "sort_active_identities"
 harness = false
+
+[[bench]]
+name = "staking"
+harness = false

data_structures/benches/staking.rs

@@ -0,0 +1,85 @@
+#[macro_use]
+extern crate bencher;
+use bencher::Bencher;
+use rand::Rng;
+use witnet_data_structures::staking::prelude::*;
+
+fn populate(b: &mut Bencher) {
+    let mut stakes = Stakes::<String, u64, u64, u64>::default();
+    let mut i = 1;
+
+    b.iter(|| {
+        let address = format!("{i}");
+        let coins = i;
+        let epoch = i;
+        stakes.add_stake(address, coins, epoch).unwrap();
+
+        i += 1;
+    });
+}
+
+fn rank(b: &mut Bencher) {
+    let mut stakes = Stakes::<String, u64, u64, u64>::default();
+    let mut i = 1;
+
+    let stakers = 100_000;
+    let rf = 10;
+
+    let mut rng = rand::thread_rng();
+
+    loop {
+        let coins = i;
+        let epoch = i;
+        let address = format!("{}", rng.gen::<u64>());
+
+        stakes.add_stake(address, coins, epoch).unwrap();
+
+        i += 1;
+
+        if i == stakers {
+            break;
+        }
+    }
+
+    b.iter(|| {
+        let rank = stakes.rank(Capability::Mining, i);
+        let mut top = rank.take(usize::try_from(stakers / rf).unwrap());
+        let _first = top.next();
+        let _last = top.last();
+
+        i += 1;
+    })
+}
+
+fn query_power(b: &mut Bencher) {
+    let mut stakes = Stakes::<String, u64, u64, u64>::default();
+    let mut i = 1;
+
+    let stakers = 100_000;
+
+    loop {
+        let coins = i;
+        let epoch = i;
+        let address = format!("{i}");
+
+        stakes.add_stake(address, coins, epoch).unwrap();
+
+        i += 1;
+
+        if i == stakers {
+            break;
+        }
+    }
+
+    i = 1;
+
+    b.iter(|| {
+        let address = format!("{i}");
+        let _power = stakes.query_power(&address, Capability::Mining, i);
+
+        i += 1;
+    })
+}
+
+benchmark_main!(benches);
+benchmark_group!(benches, populate, rank, query_power);

data_structures/examples/transactions_pool_overhead.rs

@@ -100,7 +100,7 @@ fn random_transaction() -> (Transaction, u64) {
     } else {
         let dr_output = random_dr_output();
         Transaction::DataRequest(DRTransaction {
-            body: DRTransactionBody::new(inputs, outputs, dr_output),
+            body: DRTransactionBody::new(inputs, dr_output, outputs),
             signatures: vec![signature; num_inputs],
         })
     };

data_structures/src/capabilities.rs

@@ -0,0 +1,44 @@
+#[repr(u8)]
+#[derive(Clone, Copy, Debug)]
+pub enum Capability {
+    /// The base block mining and superblock voting capability
+    Mining = 0,
+    /// The universal HTTP GET / HTTP POST / WIP-0019 RNG capability
+    Witnessing = 1,
+}
+
+#[derive(Copy, Clone, Debug, Default, PartialEq)]
+pub struct CapabilityMap<T>
+where
+    T: Default,
+{
+    pub mining: T,
+    pub witnessing: T,
+}
+
+impl<T> CapabilityMap<T>
+where
+    T: Copy + Default,
+{
+    #[inline]
+    pub fn get(&self, capability: Capability) -> T {
+        match capability {
+            Capability::Mining => self.mining,
+            Capability::Witnessing => self.witnessing,
+        }
+    }
+
+    #[inline]
+    pub fn update(&mut self, capability: Capability, value: T) {
+        match capability {
+            Capability::Mining => self.mining = value,
+            Capability::Witnessing => self.witnessing = value,
+        }
+    }
+
+    #[inline]
+    pub fn update_all(&mut self, value: T) {
+        self.mining = value;
+        self.witnessing = value;
+    }
+}