This document is for SDK based on ICON JSON RPC API V2. We do not update this project any longer! Please refer to the latest version SDK based on ICON JSON RPC API V3 (https://github.com/icon-project/icon-sdk-python) instead.

ICON SDK for python

ICON supports SDK for 3rd party or user services development. You can integrate ICON SDK for your project and utilize ICON’s functionality.

• Prerequisite
• Version
• Glossary
• Technical information
• Modules
• Getting started
  • Example
• Functions of wallet
  • create_keystore_file_of_wallet(keystore_file_path, password)
  • create_wallet_by_private_key(password, hex_private_key)
  • open_keystore_file_of_wallet(keystore_file_path, password)
  • transfer_value(password, to_address, value, fee=10000000000000000, uri, hex_private_key=None, **kwargs)
  • get_wallet_info(uri)
  • get_balance(uri)
  • get_address()
  • get_block_by_hash(hash)
  • get_block_by_height(height)
  • get_last_block()

Prerequisite

• Python 3.6.x

Version

• 0.0.6 beta

Glossary

• Address of wallet : Unique string to identify the address to transfer value. It begins with hx.
• Private key: A tiny bit of code that is paired with a public key to set off algorithms to encrypt and decrypt a text for the specific address.
• Public key: Long alphanumeric characters that is used to encrypt data (message).

Technical information

There are five steps to get from private->public -> address:

1. Generate a private key.
2. Derive a public key from the private key.
3. H1 = sha3_256( Public key) => 32 byte
4. BitAddress = last 20 bytes of H1
5. Address = hx || HexString(BitAddress) ex) hxaa688d74eb5f98b577883ca203535d2aa4f0838c

Modules

• wallet : Package name of ICX wallet functions.

Getting started

$ pip install iconsdk==0.0.5

Example

from icx.wallet import Wallet

# Create a keystore file of a wallet.
my_wallet_1, _ = Wallet.create_keystore_file_of_wallet(keystore_file_path="./keystore.txt", password="test1234*")

# Create a wallet by the private key.
my_wallet_2, _ = Wallet.create_wallet_by_private_key(password="test1234*", hex_private_key="")

# Open the keystore file of the wallet.
my_wallet_3, _ = Wallet.open_keystore_file_of_wallet(keystore_file_path="./test_keystore_for_transfer.txt", password="ejfnvm1234*")

# Get balance.
balance = my_wallet_1.get_balance(uri="https://testwallet.icon.foundation/api/")

# Get information of the wallet.
wallet_info = my_wallet_1.get_wallet_info(uri="https://testwallet.icon.foundation/api/")

# Get an address.
wallet_address = my_wallet_1.get_address()

# Get block information by hash.
block1 = Wallet.get_block_by_hash('885b8021826f7e741be7f53bb95b48221e9ab263f377e997b2e47a7b8f4a2a8b')

# Get block information by height.
block2 = Wallet.get_block_by_height(1)

# Get last block information.
last_block = Wallet.get_last_block()

# Transfer value 1,010,000,000,000,000,000 loop (1.01 icx) with 10,000,000,000,000,000 loop (0.01 icx) fee.
try:
    result = my_wallet_3.transfer_value(password="ejfnvm1234*", to_address="hx68bc6f60ea01bc033504a217631c601386be26b7", \
                value="1010000000000000000", fee=10000000000000000)
except PasswordIsNotAcceptable:
    print(f"Password is not acceptable.")
except PasswordIsWrong:
     print(f"Password is wrong.")
except AddressIsWrong:
     print(f"Wallet address is wrong.")
except NotEnoughBalanceInWallet:
     print(f"Balance is not enough.")
except TransferFeeIsInvalid:
     print(f"Transaction Fee is invalid. The fee should be 10000000000000000.")
except FeeIsBiggerThanAmount:
     print(f"Fee is bigger than transaction amount.")
except AmountIsInvalid:
     print(f"The amount you want to transfer is not valid.")
except AddressIsSame:
     print(f"Wallet address to transfer must be different from Wallet address to deposit.")

Functions of wallet

create_keystore_file_of_wallet

create_keystore_file_of_wallet

create both a wallet and a keystore file with file path and given password.

Arguments

• keystore_file_path : File path for the keystore file of the wallet.
• password: Password for the wallet. Password must include alphabet character, number, and special character.

Successful case

• Return : Instance of Wallet, private key

Error cases

It will raise following exception.

• PasswordIsNotAcceptable: Password is not acceptable. It must be more than eight characters long, contain any letters from a to z, any numbers from 0 to 9 and some special characters, including @ (at sign), .(period), -(hyphen or dash), and(or) _ (underscore).
• FilePathIsWrong: File path is wrong.

create_wallet_by_private_key

create_wallet_by_private_key(hex_private_key)

create wallet without keystore file.

Arguments

• hex_private_key : A private key in hexadecimal - 256 bits in hexadecimal is 32 bytes, or 64 characters in the range 0-9 or A-F. A tiny bit of code that is paired with a public key to set off algorithms to encrypt and decrypt a text for the specific address.
• password: Password for the wallet. Password must include alphabet character, number, and special character.

Successful case

• Return : Instance of Wallet, private key

Error cases

It will raise following exception.

• TypeError

open_keystore_file_of_wallet

open_keystore_file_of_wallet(keystore_file_path, password)

Open the created keystore file and read the information of the file.

Arguments

• keystore_file_path : File path for the keystore file of the wallet.
• password: Password for the wallet. Password must include alphabet character, number, and special character.

Successful case

• Return : Instance of Wallet.

Error cases

It will raise following exception.

• PasswordIsWrong: Password is wrong.
• FilePathIsWrong: File path is wrong.

transfer_value

transfer_value(password, to_address, value, fee=10000000000000000, uri, hex_private_key=None, **kwargs)

Transfer the value from the given wallet to the specific address with the fee.

Arguments

• password : Password for the wallet in keystore file used in open_wallet_from_file()
• to_address: Address of the wallet
• value : Amount of money
• fee : Transfer fee (10000000000000000 loop)
• uri : URI of ICON API. The default value is ‘https://testwallet.icon.foundation/api/’, test net. You can use another URI of ICON API for various test net like Ethereum.
• kwargs : (Optional) Reserved for the next version

TIP

• value and fee are integer with decimal point 10^18. Ex) 1.10 icx => 1.10 X 1,000,000,000,000,000,000 = 1,100,000,000,000,000,000 loop.
• Need to wait for a while after transfer value. Because it takes time to make consensus among nodes. We recommend 0.3 sec at least.

Successful case

• Return : Response

{
    "jsonrpc": "2.0",
    "result": {
        "response_code": 0,
        "tx_hash": "4bf74e6aeeb43bde5dc8d5b62537a33ac8eb7605ebbdb51b015c1881b45b3aed"
    },
    "id":2
}

• response_code: JSON RPC error code.
• tx_hash: Hash data of the result. Use icx_getTransactionResult to get the result.
• id: It MUST be the same as the value of the id member in the Request Object.
  • If there was an error in detecting the id in the Request object (e.g. Parse error/Invalid Request), it MUST be Null.

Unsuccessful case

• Return : Response

{
    "jsonrpc": "2.0",
    "result": {
        "message": "create tx message",
        "response_code": -11
    },
    "id": 2
}

Error cases

It will raise following exception.

• AddressIsWrong : Wallet address is wrong.
• PasswordIsWrong: Password is wrong.
• NoEnoughBalanceInWallet : Sender’s wallet does not have enough balance.
• TransferFeeIsInvalid : Transfer fee is invalid.
• TimestampIsNotCorrect : Timestamp is not correct. (Adjust your computer’s time and date.)

get_wallet_info

get_wallet_info(uri)

Get the keystore file information and the balance.

Arguments

• uri : URI of ICON API. The default value is ‘https://testwallet.icon.foundation/api/’, test net. You can use another URI of ICON API for various test net like Ethereum.

Successful case

Return dictionary with sub items like below.

• balance : the balance of this wallet
• depositAddress: the address of this wallet
• completedTransactions : list of dictionary to store completed transactions
  • requestedTime : The time when the transaction was requested
  • transactionType : deposit or withdraw
  • transactionID : ID of transaction to track
  • amount : The amount of money
• pendingTransactions : list of dictionary to store pending transactions
  • requestedTime : The time when the transaction was requested
  • transactionType : deposit or withdraw
  • transactionID : ID of transaction to track
  • amount : The amount of money

Error cases

It will raise following exception.

• AddressIsWrong : Address is wrong.

get_balance

get_balance(uri)

Get the balance of all addresses in the current wallet.

Arguments

• uri : URI of ICON API. The default value is ‘https://testwallet.icon.foundation/api/’, test net. You can use another URI of ICON API for various test net like Ethereum.

Successful case

• Return integer with decimal point 10^18. Ex) 1.10 icx => It will return 1,100,000,000,000,000,000.

Error cases

It will raise following exception.

• AddressIsWrong : Address is wrong.

get_address

get_address()

Get the address of wallet.

Arguments

• N/A

Successful case

• Return string of wallet address begins from ‘hx’.

Error cases

It will raise following exception.

• AddressIsWrong : Address is wrong.

get_block_by_hash

get_block_by_hash(hash)

Get the block information by hash.

Arguments

• hash: Using hash values ​​with electronic signatures. 64 character. hexadecimal.

Successful case

• Return dictionary of the block information.

get_block_by_height

get_block_by_height(height)

Get the block information by height.

Arguments

• height : block's height

Successful case

• Return dictionary of the block information.

get_last_block

get_last_block()

Get the block information by hash.

Arguments

• N/A

Successful case

• Return dictionary of the last block information.