Node

1.5.6

Changed

• The node will recognise if a pending upgrade is unstaged and will avoid shutting down for upgrade in this case.
• If an upgrade with the same activation point as the current one is detected on startup, the node will immediately shut down for upgrade.
• Reduce chainspec setting deploys.max_ttl from 18 hours to 2 hours.

1.5.5

Added

• New chainspec setting highway.performance_meter.blocks_to_consider with a value of 10, meaning that nodes will take 10 most recent blocks into account when determining their performance in Highway for the purpose of choosing their round lengths.

Execution Engine

7.0.1

Changed

• Change the cost of wasm.storage_costs.gas_per_byte and shared::storage_costs::DEFAULT_GAS_PER_BYTE_COST from 630_000 to 1_117_587.
• Change the cost of the host function casper_add_associated_key from 9_000 to 1_200_000.
• Change the cost of the argument entry_points_size of host function casper_add_contract_version from 0 to 120_000.
• Change the cost of the host function casper_blake2band its argument in_size from 200 and 0 respectively to 1_200_000 to 120_000.
• Change the cost of the host function casper_call_contract and its arguments entry_point_name_size and runtime_args_size from 4_500, 0 and 420 respectively to 300_000_000, 120_000 and 120_000.
• Change the cost of the host function casper_call_versioned_contract and the arguments entry_point_name_size and runtime_args_size from 4_500, 0 and 420 respectively to 300_000_000, 120_000 and 120_000.
• Change the cost of the host function casper_get_balance from 3_800 to 3_000_000.
• Change the cost of arguments name_size and dest_size of host function casper_get_named_arg from 0 to 120_000.
• Change the cost of the host function casper_put_key and its arguments name_size and key_size from 38_000, 1_100 and 0 respectively to 100_000_000, 120_000 and 120_000.
• Change the cost of the host function casper_read_value and its argument key_size from 6_000 and 0 respectively to 60_000 and 120_000.
• Change the cost of the argument urefs_size of host function casper_remove_contract_user_group_urefs from 0 to 120_000.
• Change the cost of the host function casper_transfer_from_purse_to_purse from 82_000 to 82_000_000.

7.0.0

Added

• Add chainspec option core.allow_unrestricted_transfers that, if enabled, allows token transfers between any two peers. Disabling this option makes sense only for private chains.
• Add chainspec option core.allow_auction_bids that, if enabled, allows auction entrypoints delegate and add_bid to operate. Disabling this option makes sense only for private chains.
• Add chainspec option core.compute_rewards that, if enabled, computes rewards for each era. Disabling this option makes sense only for private chains.
• Add chainspec option core.refund_handling that specifies how payment refunds are handled.
• Add chainspec option core.fee_handling that specifes how transaction fees are handled.
• Add chainspec option core.administrators that, if set, contains list of administrator accounts. This option makes sense only for private chains.
• Add support for a new FFI function enable_contract_version for enabling a specific version of a contract.

Changed

• current stack height is written to stderr in case Trap(Unreachable) error is encountered during Wasm execution.
• Tweak upgrade logic transforming withdraw purses to early exit if possible.
• Lower the default gas costs of opcodes.
  • Set the cost for branching opcodes to 35,000 (br, br_if, br_table).
  • Set the cost for call opcodes to 68,000 (call, call_indirect).
• Default value for round seigniorage rate is halved to 7/175070816 due to reduction in block times, to maintain current seigniorage rate (per unit of time).
• Refund ratio is changed from 0% to 99%.