Fireblocks.Evm.Contract (Fireblocks Contract v0.1.1)

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Dynamically creates modules for Solidity ABIs at compile time and provides helpers for reading and writing contract state via the Fireblocks API.

How to use

Create a new module and call use Fireblocks.Evm.Contract with the desired parameters:

# Using an ABI file
defmodule MyApp.Contracts.ERC20 do
  use Fireblocks.Evm.Contract, abi_file: "priv/erc20-abi.json"
end

# Providing a default contract address
defmodule MyApp.Contracts.ERC20 do
  use Fireblocks.Evm.Contract,
    abi_file: "priv/erc20-abi.json",
    default_address: "0x1234...9999"
end

# Using an ABI directly (decoded JSON)
defmodule MyApp.Contracts.ERC20 do
  use Fireblocks.Evm.Contract, abi: [%{"type" => "function", ...}]
end

After this, every ABI function is accessible as an Elixir function that returns an %Fireblocks.Evm.Contract.Call{} struct:

call = MyApp.Contracts.ERC20.name()
# %Fireblocks.Evm.Contract.Call{function: "name", inputs: [], ...}

Pass that struct to Fireblocks.Evm.Contract.read/2 or Fireblocks.Evm.Contract.write/3:

MyApp.Contracts.ERC20.name()
|> Fireblocks.Evm.Contract.read(
  baseAssetId: "ETH",
  contractAddress: "0xA0b8...FeAb"
)
# {:ok, "My Token"}

Valid use options

  • :abi – decoded ABI list (list of maps) or encoded JSON binary.
  • :abi_file – path to the JSON ABI file (relative to the project root).
  • :default_address – default deployed contract address. (optional)
  • :default_base_asset_id – default Fireblocks base asset ID, e.g. "ETH". (optional)

Summary

Functions

read(call, opts)

Reads contract state by calling a view/pure ABI function via the Fireblocks API.

write(call, opts)

Writes contract state by calling a non-view ABI function via the Fireblocks API.

Functions

read(call, opts)

@spec read(Fireblocks.Evm.Contract.Call.t(), Keyword.t()) ::
  {:ok, any()} | {:error, any()}

Reads contract state by calling a view/pure ABI function via the Fireblocks API.

Parameters

  • call – an %Fireblocks.Evm.Contract.Call{} struct returned by a generated contract function.
  • opts – keyword options:

  • :baseAssetId (String.t/0) - Required. Base assetId e.g. ETH, ETH_TEST5

  • :contractAddress (String.t/0) - Required. Deployed contract address

  • :idempotentKey (String.t/0) - Optional idempotency key

Example

MyApp.Contracts.ERC20.name()
|> Fireblocks.Evm.Contract.read(
  baseAssetId: "ETH",
  contractAddress: "0x..."
)
# {:ok, "My Token"}

write(call, opts)

@spec write(Fireblocks.Evm.Contract.Call.t(), Keyword.t()) ::
  {:ok, any()} | {:error, any()}

Writes contract state by calling a non-view ABI function via the Fireblocks API.

This creates an on-chain transaction and returns a transaction ID that can be polled for status.

Parameters

  • call – an %Fireblocks.Evm.Contract.Call{} struct returned by a generated contract function.
  • opts – keyword options:

  • :baseAssetId (String.t/0) - Required. Base assetId e.g. ETH, ETH_TEST5

  • :contractAddress (String.t/0) - Required. Deployed contract address

  • :vaultId (String.t/0) - Required. Vault account ID this contract was deployed from

  • :amount (String.t/0) - Amount in base asset (for payable functions)

  • :feeLevel - Fee level for the transaction The default value is :medium.

  • :fee (String.t/0) - Max fee amount (interchangeable with feeLevel)

  • :note (String.t/0) - Custom note visible in the Fireblocks workspace

  • :useGasless (boolean/0) - The default value is false.

  • :externalId (String.t/0) - External identifier (max 255 characters)

  • :idempotentKey (String.t/0) - Optional idempotency key

Example

MyApp.Contracts.ERC20.transfer("0xDest...", 1_000)
|> Fireblocks.Evm.Contract.write(
  baseAssetId: "ETH",
  contractAddress: "0x...",
  vaultId: "1",
  feeLevel: :medium,
  note: "monthly distribution",
  useGasless: false
)