OpCode Costs Tables

The following tables outline the cost, in motes, for a given operation on Casper's Mainnet. If you are building for a private network or other instance of Casper, you will need to verify these costs in the associated chainspec.toml.

More information on chainspecs for private networks can be found here

note

All costs in this table are in motes, not CSPR, and the corresponding chainspec is here.

Storage Costs

Attribute	Description	Cost
gas_per_byte	Gas charged per byte stored in global state.	1_117_587

OpCode Costs

Attribute	Description	Cost
bit	Bit operations multiplier.	300
add	Arithmetic add operations multiplier.	210
mul	Mul operations multiplier.	240
div	Div operations multiplier.	320
load	Memory load operation multiplier.	2_500
store	Memory store operation multiplier.	4_700
const	Const store operation multiplier.	110
local	Local operations multiplier.	390
global	Global operations multiplier.	390
integer_comparison	Integer operations multiplier.	250
conversion	Conversion operations multiplier.	420
unreachable	Unreachable operation multiplier.	270
nop	Nop operation multiplier.	200
current_memory	Get the current memory operation multiplier.	290
grow_memory	Grow memory cost per page (64 kB).	240_000

Control Flow Operation Costs

Attribute	Description	Cost
block	Cost for block opcode.	440
loop	Cost for loop opcode.	440
if	Cost for if opcode.	440
else	Cost for else opcode.	440
end	Cost for end opcode.	440
br	Cost for br opcode.	35_000
br_if	Cost for br_if opcode.	35_000
return	Cost for return opcode.	440
select	Cost for select opcode.	440
call	Cost for call opcode.	68_000
call_indirect	Cost for call_indirect opcode.	68_000
drop	Cost for drop opcode.	440

Br_Table OpCode Costs

Attribute	Description	Cost
cost	Fixed cost per br_table opcode.	35_000
size_multiplier	Size of target labels in the br_table opcode will be multiplied by size_multiplier.	100

External Function Costs

The following costs are for low-level bindings for host-side ("external") functions. More information on the Casper external FFI can be found here.

Host-Side Function	Cost	Arguments
add	5_800	[0, 0, 0, 0]
add_associated_key	1_200_000	[0, 0, 0]
add_contract_version	200	[0, 0, 0, 0, 120_000, 0, 0, 0, 30_000, 0, 0]
blake2b	1_200_000	[0, 120_000, 0, 0]
call_contract	300_000_000	[0, 0, 0, 120_000, 0, 120_000, 0]
call_versioned_contract	300_000_000	[0, 0, 0, 0, 120_000, 0, 120_000, 0]
create_contract_package_at_hash	200	[0, 0]
create_contract_user_group	200	[0, 0, 0, 0, 0, 0, 0, 0]
create_purse	2_500_000_000	[0, 0]
disable_contract_version	200	[0, 0, 0, 0]
get_balance	3_000_000	[0, 0, 0]
get_blocktime	330	[0]
get_caller	380	[0]
get_key	2_000	[0, 440, 0, 0, 0]
get_main_purse	1_300	[0]
get_named_arg	200	[0, 120_000, 0, 120_000]
get_named_arg_size	200	[0, 0, 0]
get_phase	710	[0]
get_system_contract	1_100	[0, 0, 0]
has_key	1_500	[0, 840]
is_valid_uref	760	[0, 0]
load_named_keys	42_000	[0, 0]
new_uref	17_000	[0, 0, 590]
random_bytes	200	[0, 0]
print	20_000	[0, 4_600]
provision_contract_user_group_uref	200	[0, 0, 0, 0, 0]
put_key	100_000_000	[0, 120_000, 0, 120_000]
read_host_buffer	3_500	[0, 310, 0]
read_value	60_000	[0, 120_000, 0]
read_value_local	5_500	[0, 590, 0]
remove_associated_key	4_200	[0, 0]
remove_contract_user_group	200	[0, 0, 0, 0]
remove_contract_user_group_urefs	200	[0, 0, 0, 0, 0, 120_000]
remove_key	61_000	[0, 3_200]
ret	23_000	[0, 420_000]
revert	500	[0]
set_action_threshold	74_000	[0, 0]
transfer_from_purse_to_account	2_500_000_000	[0, 0, 0, 0, 0, 0, 0, 0, 0]
transfer_from_purse_to_purse	82_000_000	[0, 0, 0, 0, 0, 0, 0, 0]
transfer_to_account	2_500_000_000	[0, 0, 0, 0, 0, 0, 0]
update_associated_key	4_200	[0, 0, 0]
write	14_000	[0, 0, 0, 980]
dictionary_put	9_500	[0, 1_800, 0, 520]
enable_contract_version	200	[0, 0, 0, 0]
manage_message_topic	200	[0, 30_000, 0, 0]
emit_message	200	[0, 30_000, 0, 120_000]
cost_increase_per_message	50

Auction System Contract Costs

These are the costs of calling auction system contract entrypoints.

Entrypoint	Description	Cost
get_era_validators	Cost of calling the get_era_validators entrypoint.	10_000
read_seigniorage_recipients	Cost of calling the read_seigniorage_recipients entrypoint.	10_000
add_bid	Cost of calling the add_bid entrypoint.	2_500_000_000
withdraw_bid	Cost of calling the withdraw_bid entrypoint.	2_500_000_000
delegate	Cost of calling the delegate entrypoint.	2_500_000_000
undelegate	Cost of calling the undelegate entrypoint.	2_500_000_000
run_auction	Cost of calling the run_auction entrypoint.	10_000
slash	Cost of calling the slash entrypoint.	10_000
distribute	Cost of calling the distribute entrypoint.	10_000
withdraw_delegator_reward	Cost of calling the withdraw_delegator_reward entrypoint.	10_000
withdraw_validator_reward	Cost of calling the withdraw_validator_reward entrypoint.	10_000
read_era_id	Cost of calling the read_era_id entrypoint.	10_000
activate_bid	Cost of calling the activate_bid entrypoint.	10_000
redelegate	Cost of calling the redelegate entrypoint.	2_500_000_000
change_bid_public_key	Cost of calling the change_bid_public_key entrypoint.	5_000_000_000

Mint System Contract Costs

These are the costs of calling mint system contract entrypoints.

Entrypoint	Description	Cost
mint	Cost of calling the mint entrypoint.	2_500_000_000
reduce_total_supply	Cost of calling the reduce_total_supply entrypoint.	10_000
create	Cost of calling the create entrypoint.	2_500_000_000
balance	Cost of calling the balance entrypoint.	10_000
burn	Cost of calling the burn entrypoint.	10_000
transfer	Cost of calling the transfer entrypoint.	10_000
read_base_round_reward	Cost of calling the read_base_round_reward entrypoint.	10_000
mint_into_existing_purse	Cost of calling the mint_into_existing_purse entrypoint.	2_500_000_000

Handle_Payment System Contract Costs

These are the costs of calling entrypoints on the handle_payment system contract.

Entrypoint	Description	Cost
get_payment_purse	Cost of calling the get_payment_purse entrypoint.	10_000
set_refund_purse	Cost of calling the set_refund_purse entrypoint.	10_000
get_refund_purse	Cost of calling the get_refund_purse entrypoint.	10_000
finalize_payment	Cost of calling the finalize_payment entrypoint.	10_000

Standard_Payment System Contract Costs

These settings manage the costs of calling entrypoints on the standard_payment system contract.

Entrypoint	Description	Cost
pay	Cost of calling the pay entrypoint and sending an amount to a payment purse.	10_000