Module block_cost_limits

defines block cost related limits

Constants

• COMPUTE_UNIT_TO_US_RATIO
  Cluster averaged compute unit to micro-sec conversion rate
• ED25519_VERIFY_COST
  Number of compute units for one ed25519 signature verification.
• ED25519_VERIFY_STRICT_COST
  Number of compute units for one ed25519 strict signature verification.
• INSTRUCTION_DATA_BYTES_COST
  Number of data bytes per compute units
• MAX_BLOCK_ACCOUNTS_DATA_SIZE_DELTA
  The maximum allowed size, in bytes, that accounts data can grow, per block. This can also be thought of as the maximum size of new allocations per block.
• MAX_BLOCK_REPLAY_TIME_US
  Static configurations:
• MAX_BLOCK_UNITS
  Statically computed data:
• MAX_BLOCK_UNITS_SIMD_0207
• MAX_CONCURRENCY
  number of concurrent processes,
• MAX_VOTE_UNITS
  Number of compute units that a block can have for vote transactions, sets at ~75% of MAX_BLOCK_UNITS to leave room for non-vote transactions
• MAX_WRITABLE_ACCOUNT_UNITS
  Number of compute units that a writable account in a block is allowed. The limit is to prevent too many transactions write to same account, therefore reduce block’s parallelism.
• SECP256K1_VERIFY_COST
  Number of compute units for one secp256k1 signature verification.
• SIGNATURE_COST
  Number of compute units for one signature verification.
• WRITE_LOCK_UNITS
  Number of compute units for one write lock

Functions

• simd_0207_block_limits
  Return the block limits that will be used upon activation of SIMD-0207. Returns as (account_limit, block_limit, vote_limit)