Line data    Source code

       1             : #include "fd_sysvar_stake_history.h"
       2             : #include "fd_sysvar.h"
       3             : #include "../fd_system_ids.h"
       4             : #include "../fd_txn_account.h"
       5             : #include "../fd_acc_mgr.h"
       6             : 
       7             : /* Ensure that the size declared by our header matches the minimum size
       8             :    of the corresponding fd_types entry. */
       9             : 
      10             : static void
      11             : write_stake_history( fd_bank_t *               bank,
      12             :                      fd_funk_t *               funk,
      13             :                      fd_funk_txn_xid_t const * xid,
      14             :                      fd_capture_ctx_t *        capture_ctx,
      15           9 :                      fd_stake_history_t *      stake_history ) {
      16             :   /* https://github.com/solana-labs/solana/blob/8f2c8b8388a495d2728909e30460aa40dcc5d733/sdk/program/src/sysvar/stake_history.rs#L12 */
      17           9 :   uchar enc[FD_SYSVAR_STAKE_HISTORY_BINCODE_SZ] = {0};
      18             : 
      19           9 :   fd_bincode_encode_ctx_t encode =
      20           9 :     { .data    = enc,
      21           9 :       .dataend = enc + sizeof(enc) };
      22           9 :   if( FD_UNLIKELY( fd_stake_history_encode( stake_history, &encode )!=FD_BINCODE_SUCCESS ) )
      23           0 :     FD_LOG_ERR(("fd_stake_history_encode failed"));
      24             : 
      25           9 :   fd_sysvar_account_update( bank, funk, xid, capture_ctx, &fd_sysvar_stake_history_id, enc, sizeof(enc) );
      26           9 : }
      27             : 
      28             : fd_stake_history_t *
      29             : fd_sysvar_stake_history_read( fd_funk_t *               funk,
      30             :                               fd_funk_txn_xid_t const * xid,
      31           6 :                               fd_stake_history_t *      stake_history ) {
      32           6 :   fd_txn_account_t stake_rec[1];
      33           6 :   int err = fd_txn_account_init_from_funk_readonly( stake_rec, &fd_sysvar_stake_history_id, funk, xid );
      34           6 :   if( FD_UNLIKELY( err!=FD_ACC_MGR_SUCCESS ) ) {
      35           0 :     return NULL;
      36           0 :   }
      37             : 
      38             :   /* This check is needed as a quirk of the fuzzer. If a sysvar account
      39             :      exists in the accounts database, but doesn't have any lamports,
      40             :      this means that the account does not exist. This wouldn't happen
      41             :      in a real execution environment. */
      42           6 :   if( FD_UNLIKELY( fd_txn_account_get_lamports( stake_rec )==0UL ) ) {
      43           0 :     return NULL;
      44           0 :   }
      45             : 
      46           6 :   return fd_bincode_decode_static(
      47           6 :       stake_history, stake_history,
      48           6 :       fd_txn_account_get_data( stake_rec ),
      49           6 :       fd_txn_account_get_data_len( stake_rec ),
      50           6 :       &err );
      51           6 : }
      52             : 
      53             : void
      54             : fd_sysvar_stake_history_init( fd_bank_t *               bank,
      55             :                               fd_funk_t *               funk,
      56             :                               fd_funk_txn_xid_t const * xid,
      57           3 :                               fd_capture_ctx_t *        capture_ctx ) {
      58           3 :   fd_stake_history_t stake_history;
      59           3 :   fd_stake_history_new( &stake_history );
      60           3 :   write_stake_history( bank, funk, xid, capture_ctx, &stake_history );
      61           3 : }
      62             : 
      63             : void
      64             : fd_sysvar_stake_history_update( fd_bank_t *                                 bank,
      65             :                                 fd_funk_t *                                 funk,
      66             :                                 fd_funk_txn_xid_t const *                   xid,
      67             :                                 fd_capture_ctx_t *                          capture_ctx,
      68           6 :                                 fd_epoch_stake_history_entry_pair_t const * pair ) {
      69             : 
      70           6 :   fd_stake_history_t stake_history[1];
      71           6 :   if( FD_UNLIKELY( !fd_sysvar_stake_history_read( funk, xid, stake_history ) ) ) {
      72           0 :     FD_LOG_CRIT(( "Failed to read stake history sysvar" ));
      73           0 :   }
      74             : 
      75           6 :   if( stake_history->fd_stake_history_offset == 0 ) {
      76           6 :     stake_history->fd_stake_history_offset = stake_history->fd_stake_history_size - 1;
      77           6 :   } else {
      78           0 :     stake_history->fd_stake_history_offset--;
      79           0 :   }
      80             : 
      81           6 :   if( stake_history->fd_stake_history_len < stake_history->fd_stake_history_size ) {
      82           6 :     stake_history->fd_stake_history_len++;
      83           6 :   }
      84             : 
      85             :   // This should be done with a bit mask
      86           6 :   ulong idx = stake_history->fd_stake_history_offset;
      87             : 
      88           6 :   stake_history->fd_stake_history[ idx ].epoch              = pair->epoch;
      89           6 :   stake_history->fd_stake_history[ idx ].entry.activating   = pair->entry.activating;
      90           6 :   stake_history->fd_stake_history[ idx ].entry.effective    = pair->entry.effective;
      91           6 :   stake_history->fd_stake_history[ idx ].entry.deactivating = pair->entry.deactivating;
      92             : 
      93           6 :   write_stake_history( bank, funk, xid, capture_ctx, stake_history );
      94             : 
      95           6 : }