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Lightweight Ethereum and Solana RPC client for Elixir
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lib/signet/fee_history.ex
defmodule Signet.FeeHistory do
@moduledoc ~S"""
Represents fee history data as defined in EIP-1559.
See `Signet.RPC.fee_history` for getting traces from
an Ethereum JSON-RPC host.
See also:
* Alchemy docs: https://docs.alchemy.com/reference/eth-feehistory
* Infura docs: https://docs.infura.io/api/networks/ethereum/json-rpc-methods/eth_feehistory
"""
@type t() :: %__MODULE__{
oldest_block: integer(),
base_fee_per_gas: [integer()],
gas_used_ratio: [integer()],
reward: [[float()]] | nil
}
defstruct [
:oldest_block,
:base_fee_per_gas,
:gas_used_ratio,
:reward
]
@doc ~S"""
Deserializes fee history data from `eth_feeHistory` RPC response.
## Examples
iex> %{
...> "oldestBlock" => "0xfd6a75",
...> "reward" => [
...> [
...> "0x3b9aca00",
...> "0x3b9aca00",
...> "0x59682f00"
...> ],
...> [
...> "0x3b9aca00",
...> "0x3b9aca00",
...> "0x77359400"
...> ],
...> [
...> "0x3b9aca00",
...> "0x3b9aca00",
...> "0x3b9aca00"
...> ],
...> [
...> "0x2e7ddb00",
...> "0x3b9aca00",
...> "0x77359400"
...> ],
...> [
...> "0x3b9aca00",
...> "0x3b9aca00",
...> "0x59682f00"
...> ]
...> ],
...> "baseFeePerGas" => [
...> "0x4c9d974c3",
...> "0x4c38a847a",
...> "0x49206d475",
...> "0x47ac58b63",
...> "0x471e805d8",
...> "0x46f5f64a6"
...> ],
...> "gasUsedRatio" => [
...> 0.4794155666666667,
...> 0.3375966,
...> 0.42049746666666665,
...> 0.4690773,
...> 0.49109343333333333
...> ]
...> }
...> |> Signet.FeeHistory.deserialize()
%Signet.FeeHistory{
base_fee_per_gas: [20566340803, 20460504186, 19629790325, 19239635811, 19090900440, 19048391846],
gas_used_ratio: [0.4794155666666667, 0.3375966, 0.42049746666666665, 0.4690773, 0.49109343333333333],
oldest_block: 16607861,
reward: [[1000000000, 1000000000, 1500000000], [1000000000, 1000000000, 2000000000], [1000000000, 1000000000, 1000000000], [780000000, 1000000000, 2000000000], [1000000000, 1000000000, 1500000000]]
}
iex> %{"baseFeePerGas" => ["0xa", "0xa"], "gasUsedRatio" => [0.1878495], "oldestBlock" => "0xa01de6"}
...> |> Signet.FeeHistory.deserialize()
%Signet.FeeHistory{base_fee_per_gas: [10, 10], gas_used_ratio: [0.1878495], oldest_block: 10493414, reward: nil}
"""
@spec deserialize(map()) :: t() | no_return()
def deserialize(
params = %{
"oldestBlock" => oldest_block,
"baseFeePerGas" => base_fee_per_gas,
"gasUsedRatio" => gas_used_ratio
}
) do
%__MODULE__{
oldest_block: Signet.Hex.decode_hex_number!(oldest_block),
base_fee_per_gas: Enum.map(base_fee_per_gas, &Signet.Hex.decode_hex_number!/1),
gas_used_ratio: gas_used_ratio,
reward:
case params["reward"] do
nil ->
nil
reward ->
Enum.map(reward, fn r -> Enum.map(r, &Signet.Hex.decode_hex_number!/1) end)
end
}
end
end