Have the TendermintMachine domain-separate by genesis

Enbables support for multiple machines over the same DB.

coordinator/tributary/tendermint/src/block.rs

@@ -16,6 +16,7 @@ use crate::{
 
 pub(crate) struct BlockData<N: Network> {
   db: N::Db,
+  genesis: [u8; 32],
 
   pub(crate) number: BlockNumber,
   pub(crate) validator_id: Option<N::ValidatorId>,
@@ -38,6 +39,7 @@ pub(crate) struct BlockData<N: Network> {
 impl<N: Network> BlockData<N> {
   pub(crate) fn new(
     db: N::Db,
+    genesis: [u8; 32],
     weights: Arc<N::Weights>,
     number: BlockNumber,
     validator_id: Option<N::ValidatorId>,
@@ -45,6 +47,7 @@ impl<N: Network> BlockData<N> {
   ) -> BlockData<N> {
     BlockData {
       db,
+      genesis,
 
       number,
       validator_id,
@@ -151,6 +154,7 @@ impl<N: Network> BlockData<N> {
       let mut txn = self.db.txn();
       let key = [
         b"tendermint-machine_already_sent_message".as_ref(),
+        &self.genesis,
         &self.number.0.to_le_bytes(),
         &round_number.0.to_le_bytes(),
         &step.encode(),

coordinator/tributary/tendermint/src/lib.rs

@@ -232,6 +232,7 @@ pub enum SlashEvent {
 /// A machine executing the Tendermint protocol.
 pub struct TendermintMachine<N: Network> {
   db: N::Db,
+  genesis: [u8; 32],
 
   network: N,
   signer: <N::SignatureScheme as SignatureScheme>::Signer,
@@ -325,6 +326,7 @@ impl<N: Network + 'static> TendermintMachine<N> {
     // Create the new block
     self.block = BlockData::new(
       self.db.clone(),
+      self.genesis,
       self.weights.clone(),
       BlockNumber(self.block.number.0 + 1),
       self.signer.validator_id().await,
@@ -375,6 +377,7 @@ impl<N: Network + 'static> TendermintMachine<N> {
   pub async fn new(
     db: N::Db,
     network: N,
+    genesis: [u8; 32],
     last_block: BlockNumber,
     last_time: u64,
     proposal: N::Block,
@@ -414,6 +417,7 @@ impl<N: Network + 'static> TendermintMachine<N> {
         // 01-10
         let mut machine = TendermintMachine {
           db: db.clone(),
+          genesis,
 
           network,
           signer,
@@ -427,6 +431,7 @@ impl<N: Network + 'static> TendermintMachine<N> {
 
           block: BlockData::new(
             db,
+            genesis,
             weights,
             BlockNumber(last_block.0 + 1),
             validator_id,

coordinator/tributary/tendermint/tests/ext.rs

@@ -176,6 +176,7 @@ impl TestNetwork {
           TendermintMachine::new(
             MemDb::new(),
             TestNetwork(i, arc.clone()),
+            [0; 32],
             BlockNumber(1),
             start_time,
             TestBlock { id: 1u32.to_le_bytes(), valid: Ok(()) },