module : sdk.account

Link to GitHub

Entities:

1. TransactionError
   • __init__
   • __str__
2. Account
   • __init__
   • _get_nonce
   • _get_gas_price
   • _send_signed_transaction
   • send_transaction
   • _parse_receipt
   • escrow_balance
   • deposit_to_escrow_account
   • approve_transfer
   • allowance

Class TransactionError

extends: Exception

is extended by: -

description

TransactionError is a custom exception class that is raised when an Ethereum transaction receipt has a status of 0. This indicates that the transaction failed. Can provide a custom message. Optionally includes receipt

attributes

• message (str): The exception message.
• receipt (dict): The transaction receipt.

methods

__init__

Initializes the exception with the provided message and receipt.

args:

• message (str): The exception message.
• receipt (dict): The transaction receipt. Defaults to None.

returns:

• None

__str__

Returns a string representation of the TransactionError object.

returns:

• A string containing the message attribute of the TransactionError object. (str)

Class Account

extends: -

is extended by: -

description

Account is responsible for managing the Ethereum account associated with the SingularityNET platform. It provides methods for interacting with the MultiPartyEscrow contract, the SingularityNetToken contract, and the Ethereum blockchain.

attributes

• config (dict): The configuration settings for the account. Note: In fact, this is the same config from SnetSDK.
• web3 (Web3): An instance of the Web3 class for interacting with the Ethereum blockchain.
• mpe_contract (MPEContract): An instance of the MPEContract class for interacting with the MultiPartyEscrow contract.
• token_contract (Contract): An instance of the Contract class from the web3 library for interacting with the SingularityNET ASI (FET) Token contract.
• private_key (str): The private key associated with the account.
• signer_private_key (str): The private key used for signing transactions.
• address (str): The Ethereum address associated with the account.
• signer_address (str): The Ethereum address used for signing transactions.
• nonce (int): The nonce value for the account.

methods

__init__

Initializes a new instance of the Account class.

args:

• w3 (Web3): An instance of the Web3 class.
• config (dict): A dictionary containing the configuration settings.
• mpe_contract (MPEContract): An instance of the MPEContract class.

returns:

• None

_get_nonce

Returns the next nonce for a transaction.

returns:

• The next nonce for a transaction. (int)

_get_gas_price

Calculates the gas price for a transaction.

Retrieves the current gas price from the Ethereum network using the web3 and increases it according to a certain algorithm so that the transaction goes faster.

returns:

• The calculated gas price. (int)

_send_signed_transaction

Sends a signed transaction to the Ethereum blockchain.

Builds a transaction using the given contract function and arguments, signs it with the private key of the account, and sends it to the Ethereum blockchain.

args:

• contract_fn: The contract function to be called.
• *args: The arguments to pass to the contract function.

returns:

• Hash of the sent transaction. (HexStr | str)

send_transaction

Sends a transaction by calling the given contract function with the provided arguments.

args:

• contract_fn: The contract function to be called.
• *args: The arguments to pass to the contract function.

returns:

• The transaction receipt indicating the success or failure of the transaction. (TxReceipt)

_parse_receipt

Parses the receipt of a transaction and returns the result as a JSON string.

args:

• receipt (TxReceipt): The receipt of the transaction.
• event (Event): The event to process the receipt with.
• encoder (JSONEncoder): The JSON encoder to use. Defaults to json.JSONEncoder.

returns:

• The result of processing the receipt as a JSON string. (str)

raises:

• TransactionError: If the transaction status is 0, indicating a failed transaction.

escrow_balance

Retrieves the escrow balance for the current account.

returns:

• The escrow balance in cogs. (int)

deposit_to_escrow_account

Deposit the specified amount of ASI (FET) tokens in cogs into the MPE account.

args:

• amount_in_cogs (int): The amount of ASI (FET) tokens in cogs to deposit.

returns:

• The transaction receipt of the transaction. (TxReceipt)

approve_transfer

Approves a transfer of a specified amount of ASI (FET) tokens in cogs to the MPE contract.

args:

• amount_in_cogs (int): The amount of ASI (FET) tokens in cogs to approve for transfer.

returns:

• The transaction receipt of the transaction. (TxReceipt)

allowance

Retrieves the allowance of the current account for the MPE contract.

returns:

• The allowance in cogs. (int)