flamenco: fix stakes_history_entry type

Author: cali-jumptrading

src/flamenco/runtime/program/fd_stake_program.c

@@ -450,7 +450,7 @@ fd_stake_history_ele_binary_search_const( fd_stake_history_t const * history,
   while ( start<=end ) {
     ulong mid = start + ( end - start ) / 2UL;
     if( history->fd_stake_history[mid].epoch==epoch ) {
-      return &history->fd_stake_history[mid];
+      return &history->fd_stake_history[mid].entry;
     } else if( history->fd_stake_history[mid].epoch<epoch ) {
       if ( mid==0 ) return NULL;
       end = mid - 1;
@@ -480,7 +480,7 @@ fd_stake_history_ele_query_const( fd_stake_history_t const * history,
   ulong e = (off + history->fd_stake_history_offset) & (history->fd_stake_history_size - 1);
 
   if ( history->fd_stake_history[e].epoch == epoch ) {
-    return &history->fd_stake_history[e];
+    return &history->fd_stake_history[e].entry;
   }
 
   // if the epoch did not match, we do a binary search

src/flamenco/runtime/sysvar/fd_sysvar_stake_history.c

@@ -44,9 +44,9 @@ fd_sysvar_stake_history_init( fd_exec_slot_ctx_t * slot_ctx ) {
 }
 
 void
-fd_sysvar_stake_history_update( fd_exec_slot_ctx_t *       slot_ctx,
-                                fd_stake_history_entry_t * entry,
-                                fd_spad_t *                runtime_spad ) {
+fd_sysvar_stake_history_update( fd_exec_slot_ctx_t *                  slot_ctx,
+                                fd_epoch_stake_history_entry_pair_t * pair,
+                                fd_spad_t *                           runtime_spad ) {
   // Need to make this maybe zero copies of map...
   fd_stake_history_t * stake_history = fd_sysvar_stake_history_read( slot_ctx, runtime_spad );
 
@@ -63,10 +63,10 @@ fd_sysvar_stake_history_update( fd_exec_slot_ctx_t *       slot_ctx,
   // This should be done with a bit mask
   ulong idx = stake_history->fd_stake_history_offset;
 
-  stake_history->fd_stake_history[ idx ].epoch = entry->epoch;
-  stake_history->fd_stake_history[ idx ].activating = entry->activating;
-  stake_history->fd_stake_history[ idx ].effective = entry->effective;
-  stake_history->fd_stake_history[ idx ].deactivating = entry->deactivating;
+  stake_history->fd_stake_history[ idx ].epoch              = pair->epoch;
+  stake_history->fd_stake_history[ idx ].entry.activating   = pair->entry.activating;
+  stake_history->fd_stake_history[ idx ].entry.effective    = pair->entry.effective;
+  stake_history->fd_stake_history[ idx ].entry.deactivating = pair->entry.deactivating;
 
   write_stake_history( slot_ctx, stake_history );
 }

src/flamenco/runtime/sysvar/fd_sysvar_stake_history.h

@@ -21,9 +21,9 @@ fd_sysvar_stake_history_init( fd_exec_slot_ctx_t * slot_ctx );
 
 /* Update the stake history sysvar account - called during epoch boundary*/
 void
-fd_sysvar_stake_history_update( fd_exec_slot_ctx_t *       slot_ctx,
-                                fd_stake_history_entry_t * entry,
-                                fd_spad_t *                runtime_spad );
+fd_sysvar_stake_history_update( fd_exec_slot_ctx_t *                  slot_ctx,
+                                fd_epoch_stake_history_entry_pair_t * pair,
+                                fd_spad_t *                           runtime_spad );
 
 FD_PROTOTYPES_END
 

src/flamenco/runtime/tests/harness/fd_txn_harness.c

@@ -144,7 +144,7 @@ fd_runtime_fuzz_txn_ctx_create( fd_runtime_fuzz_runner_t *         runner,
   /* Provide default stake history if not provided */
   if( !slot_ctx->sysvar_cache->has_stake_history ) {
     // Provide a 0-set default entry
-    fd_stake_history_entry_t entry = {0};
+    fd_epoch_stake_history_entry_pair_t entry = {0};
     fd_sysvar_stake_history_init( slot_ctx );
     fd_sysvar_stake_history_update( slot_ctx, &entry, runner->spad );
   }

src/flamenco/stakes/fd_stakes.c

@@ -672,11 +672,13 @@ fd_stakes_activate_epoch( fd_exec_slot_ctx_t *  slot_ctx,
                              runtime_spad );
 
   /* https://github.com/anza-xyz/agave/blob/v2.1.6/runtime/src/stakes.rs#L359 */
-  fd_stake_history_entry_t new_elem = {
+  fd_epoch_stake_history_entry_pair_t new_elem = {
     .epoch        = stakes->epoch,
-    .effective    = accumulator.effective,
-    .activating   = accumulator.activating,
-    .deactivating = accumulator.deactivating
+    .entry        = {
+      .effective    = accumulator.effective,
+      .activating   = accumulator.activating,
+      .deactivating = accumulator.deactivating
+    }
   };
 
   fd_sysvar_stake_history_update( slot_ctx, &new_elem, runtime_spad );

src/flamenco/types/fd_fuzz_types.h

@@ -250,6 +250,15 @@ void *fd_stake_history_entry_generate( void *mem, void **alloc_mem, fd_rng_t * r
   return mem;
 }
 
+void *fd_epoch_stake_history_entry_pair_generate( void *mem, void **alloc_mem, fd_rng_t * rng ) {
+  fd_epoch_stake_history_entry_pair_t *self = (fd_epoch_stake_history_entry_pair_t *) mem;
+  *alloc_mem = (uchar *) *alloc_mem + sizeof(fd_epoch_stake_history_entry_pair_t);
+  fd_epoch_stake_history_entry_pair_new(mem);
+  self->epoch = fd_rng_ulong( rng );
+  fd_stake_history_entry_generate( &self->entry, alloc_mem, rng );
+  return mem;
+}
+
 void *fd_stake_history_generate( void *mem, void **alloc_mem, fd_rng_t * rng ) {
   fd_stake_history_t *self = (fd_stake_history_t *) mem;
   *alloc_mem = (uchar *) *alloc_mem + sizeof(fd_stake_history_t);
@@ -258,7 +267,7 @@ void *fd_stake_history_generate( void *mem, void **alloc_mem, fd_rng_t * rng ) {
   self->fd_stake_history_size = 512;
   self->fd_stake_history_offset = 0;
   for( ulong i=0; i<self->fd_stake_history_len; i++ ) {
-    fd_stake_history_entry_generate( self->fd_stake_history + i, alloc_mem, rng );
+    fd_epoch_stake_history_entry_pair_generate( self->fd_stake_history + i, alloc_mem, rng );
   }
   return mem;
 }

src/flamenco/types/fd_types.c

@@ -169,11 +169,19 @@
         { "name": "deactivating", "type": "ulong" }
       ]
     },
+    {
+      "name": "epoch_stake_history_entry_pair",
+      "type": "struct",
+      "fields": [
+        { "name": "epoch", "type": "ulong" },
+        { "name": "entry", "type": "stake_history_entry" }
+      ]
+    },
     {
       "name": "stake_history",
       "type": "struct",
       "fields": [
-        { "name": "fd_stake_history", "type": "static_vector", "element": "stake_history_entry", "size": 512 }
+        { "name": "fd_stake_history", "type": "static_vector", "element": "epoch_stake_history_entry_pair", "size": 512 }
       ],
       "comment": "https://github.com/firedancer-io/solana/blob/v1.17/sdk/program/src/stake_history.rs#L12-L75"
     },