ABI.Event (abi v0.1.19)
Link to this section Summary
Functions
Decodes an event, including handling parsing out data from topics.
Returns the topic of an event, i.e. the first item that appears in an Ethereum log for this event.
Link to this section Functions
Link to this function
decode_event(data, topics, function_selector)
Decodes an event, including handling parsing out data from topics.
examples
Examples
iex> "00000000000000000000000000000000000000000000000000000004a817c800"
...> |> Base.decode16!(case: :lower)
...> |> ABI.Event.decode_event(
...> [
...> "ddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef" |> Base.decode16!(case: :lower),
...> "000000000000000000000000b2b7c1795f19fbc28fda77a95e59edbb8b3709c8" |> Base.decode16!(case: :lower),
...> "0000000000000000000000007795126b3ae468f44c901287de98594198ce38ea" |> Base.decode16!(case: :lower)
...> ],
...> %ABI.FunctionSelector{
...> function: "Transfer",
...> types: [
...> %{type: :address, name: "from", indexed: true},
...> %{type: :address, name: "to", indexed: true},
...> %{type: {:uint, 256}, name: "amount"},
...> ]
...> })
{"Transfer",
%{
"amount" => 20_000_000_000,
"from" => [
<<252, 55, 141, 170, 149, 43, 167, 241, 99, 196, 161, 22, 40, 245, 90, 77, 245, 35, 179, 239>>
],
"to" => [
<<178, 183, 193, 121, 95, 25, 251, 194, 143, 218, 119, 169, 94, 89, 237, 187, 139, 55, 9, 200>>
]
}}
Link to this function
event_topic(function_selector)
Returns the topic of an event, i.e. the first item that appears in an Ethereum log for this event.
examples
Examples
iex> ABI.Event.event_topic(
...> %ABI.FunctionSelector{
...> function: "Transfer",
...> types: [
...> %{type: :address, name: "from", indexed: true},
...> %{type: :address, name: "to", indexed: true},
...> %{type: {:uint, 256}, name: "amount"},
...> ]
...> }
...> )
...> |> Base.encode16(case: :lower)
"ddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"