evm

v0.1.14

evm v0.1.14 EVM.Operation.BlockInformation

Link to this section Summary

Functions

blockhash(list, map)

Get the hash of one of the 256 most recent complete blocks

coinbase(args, map)

Get the block’s beneficiary address

difficulty(args, map)

Get the block’s difficulty

gaslimit(args, map)

Get the block’s gas limit

number(args, map)

Get the block’s number

timestamp(args, map)

Get the block’s timestamp

Link to this section Functions

Link to this function blockhash(list, map) 
blockhash(EVM.Operation.stack_args, EVM.Operation.vm_map) :: EVM.Operation.op_result

Get the hash of one of the 256 most recent complete blocks.

TODO: Test 256 limit

Examples 

iex> block_b = %Block.Header{number: 2, mix_hash: "block_b"}
iex> block_a = %Block.Header{number: 1, mix_hash: "block_a"}
iex> genesis_block = %Block.Header{number: 0, mix_hash: <<0x00::256>>}
iex> block_map = %{<<0x00::256>> => genesis_block, "block_a" => block_a, "block_b" => block_b}
iex> block_interface = EVM.Interface.Mock.MockBlockInterface.new(block_b, block_map)
iex> exec_env = %EVM.ExecEnv{block_interface: block_interface}
iex> EVM.Operation.BlockInformation.blockhash([3], %{exec_env: exec_env})
0
iex> EVM.Operation.BlockInformation.blockhash([2], %{exec_env: exec_env})
"block_b"
iex> EVM.Operation.BlockInformation.blockhash([1], %{exec_env: exec_env})
"block_a"
iex> EVM.Operation.BlockInformation.blockhash([0], %{exec_env: exec_env})
<<0::256>>
iex> EVM.Operation.BlockInformation.blockhash([-1], %{exec_env: exec_env})
0
Link to this function coinbase(args, map) 
coinbase(EVM.Operation.stack_args, EVM.Operation.vm_map) :: EVM.Operation.op_result

Get the block’s beneficiary address.

Examples 

iex> block_interface = EVM.Interface.Mock.MockBlockInterface.new(%Block.Header{beneficiary: <<0x55::160>>})
iex> exec_env = %EVM.ExecEnv{block_interface: block_interface}
iex> EVM.Operation.BlockInformation.coinbase([], %{exec_env: exec_env})
<<0x55::160>>
Link to this function difficulty(args, map) 
difficulty(EVM.Operation.stack_args, EVM.Operation.vm_map) :: EVM.Operation.op_result

Get the block’s difficulty

Examples 

iex> block_interface = EVM.Interface.Mock.MockBlockInterface.new(%Block.Header{difficulty: 2_000_000})
iex> exec_env = %EVM.ExecEnv{block_interface: block_interface}
iex> EVM.Operation.BlockInformation.difficulty([], %{exec_env: exec_env})
2_000_000
Link to this function gaslimit(args, map) 
gaslimit(EVM.Operation.stack_args, EVM.Operation.vm_map) :: EVM.Operation.op_result

Get the block’s gas limit.

Examples 

iex> block_interface = EVM.Interface.Mock.MockBlockInterface.new(%Block.Header{gas_limit: 3_000_000})
iex> exec_env = %EVM.ExecEnv{block_interface: block_interface}
iex> EVM.Operation.BlockInformation.gaslimit([], %{exec_env: exec_env})
3_000_000
Link to this function number(args, map) 
number(EVM.Operation.stack_args, EVM.Operation.vm_map) :: EVM.Operation.op_result

Get the block’s number

Examples 

iex> block_interface = EVM.Interface.Mock.MockBlockInterface.new(%Block.Header{number: 1_500_000})
iex> exec_env = %EVM.ExecEnv{block_interface: block_interface}
iex> EVM.Operation.BlockInformation.number([], %{exec_env: exec_env})
1_500_000
Link to this function timestamp(args, map) 
timestamp(EVM.Operation.stack_args, EVM.Operation.vm_map) :: EVM.Operation.op_result

Get the block’s timestamp

Examples 

iex> block_interface = EVM.Interface.Mock.MockBlockInterface.new(%Block.Header{timestamp: 1_000_000})
iex> exec_env = %EVM.ExecEnv{block_interface: block_interface}
iex> EVM.Operation.BlockInformation.timestamp([], %{exec_env: exec_env})
1_000_000