denarolib 1.0.2

A Python library for interacting with the Denaro cyptocurrency

Denaro Python Client Module Documentation

This module is a lightweight Python client for interacting with a Denaro blockchain node.
It provides helper functions to query node state, blockchain data, addresses, transactions, and to build, sign, and submit transactions.

Important:
All functions that communicate with the node return a requests.Response object, not parsed data.
You must explicitly call .json(), .text, .status_code, etc., on the returned value.

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Requirements

Python

• Python 3.8+

Dependencies

pip install requests ecdsa

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Configuration

DECIMALS = 10**6
NODE = "http://denaro.mine.bz:3006/"
DEBUG = True

Description

• DECIMALS Atomic units per Denaro coin (1 DNR = 1,000,000 units).

• NODE Base URL of the Denaro node API.

• DEBUG If enabled, prints the raw requests.Response object and its decoded JSON payload.

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Return Value Convention (IMPORTANT)

All network-related functions return:

requests.Response

This allows you to manually inspect:

response.status_code
response.headers
response.text
response.json()

Example:

resp = get_status()
if resp.status_code == 200:
    data = resp.json()

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Node & Blockchain API Functions

All functions below return requests.Response.

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get_node_info() -> requests.Response

Fetches general node information.

resp = get_node_info()

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get_status() -> requests.Response

Returns blockchain and node status.

resp = get_status()

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get_peers() -> requests.Response

Returns the list of known peers.

resp = get_peers()

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get_block() -> requests.Response

Returns the latest block.

resp = get_block()

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get_blocks() -> requests.Response

Returns a list of recent blocks.

resp = get_blocks()

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get_transaction(txhash) -> requests.Response

Fetches a transaction by its hash.

resp = get_transaction("TX_HASH")

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get_pending_transactions() -> requests.Response

Returns all pending (mempool) transactions.

resp = get_pending_transactions()

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get_address_info(addr) -> requests.Response

Returns balance and transaction history for an address.

resp = get_address_info("DNR_ADDRESS")

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submit_tx(tx_hex) -> requests.Response

Submits a hex-encoded transaction to the network.

resp = submit_tx(tx_hex)

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sync_blockchain() -> requests.Response

Triggers a blockchain synchronization.

resp = sync_blockchain()

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get_mining_info() -> requests.Response

Returns mining-related information.

resp = get_mining_info()

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submit_block(id, content, txs) -> requests.Response

Submits a mined block.

resp = submit_block(
    id="BLOCK_ID",
    content="BLOCK_CONTENT",
    txs=[tx_hex_1, tx_hex_2]
)

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Cryptographic Utilities

These functions do not return requests.Response.

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sha256(b: bytes) -> bytes

Computes a SHA-256 hash.

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double_sha256(b: bytes) -> bytes

Computes SHA256(SHA256(data)).

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amount_to_int(amount: float) -> int

Converts a human-readable Denaro amount to atomic units.

amount_to_int(1.0)  # 1000000

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Transaction Construction

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build_tx_object(from_addr, to_addr, amount_int) -> dict

Creates an unsigned transaction object.

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serialize_tx(tx: dict) -> bytes

Serializes a transaction deterministically (sorted keys, compact JSON).

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sign_tx(tx_bytes, privkey_hex) -> dict

Signs a serialized transaction using ECDSA secp256k1.

Returns a dictionary containing:

• signature (hex)
• public_key (hex)

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make_tx_hex(from_addr, to_addr, amount, privkey_hex) -> str

Builds, signs, serializes, and hex-encodes a transaction.

tx_hex = make_tx_hex(...)

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Sending Transactions

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send(from_addr, to_addr, amount, privkey_hex) -> requests.Response

High-level convenience function.

• Builds the transaction
• Signs it
• Submits it to the node

resp = send(
    from_addr="FROM_ADDRESS",
    to_addr="TO_ADDRESS",
    amount=0.5,
    privkey_hex="PRIVATE_KEY_HEX"
)

Returned value is a requests.Response.

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Notes & Limitations

• All node interactions return requests.Response
• Private keys must be raw hex strings
• No UTXO selection, fee calculation, or balance validation
• Debug mode may expose sensitive data in logs

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Example Usage

resp = get_address_info("FROM_ADDRESS")
print(resp.status_code)
print(resp.json())

resp = send(
    from_addr="FROM_ADDRESS",
    to_addr="TO_ADDRESS",
    amount=1.0,
    privkey_hex="PRIVATE_KEY"
)
print(resp.json())

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Disclaimer

This module is provided as-is for development and experimentation. Use extreme caution when handling real funds.