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241 lines
6.7 KiB
241 lines
6.7 KiB
4 years ago
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from .rpc.request import (
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rpc_request
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)
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from .transaction import (
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get_transaction_receipt
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)
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_default_endpoint = 'http://localhost:9500'
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_default_timeout = 30
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#########################
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# Smart contract RPCs
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#########################
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def call(to, block_num, from_address=None, gas=None, gas_price=None, value=None, data=None,
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endpoint=_default_endpoint, timeout=_default_timeout) -> str:
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"""
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Execute a smart contract without saving state
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Parameters
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----------
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to: :obj:`str`
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Address of the smart contract
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block_num: :obj:`int`
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Block number to execute the contract for
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from_address: :obj:`str`, optional
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Wallet address
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gas: :obj:`str`, optional
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Gas to execute the smart contract (in hex)
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gas_price: :obj:`str`, optional
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Gas price to execute smart contract call (in hex)
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value: :obj:`str`, optional
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Value sent with the smart contract call (in hex)
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data: :obj:`str`, optional
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Hash of smart contract method and parameters
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endpoint: :obj:`str`, optional
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Endpoint to send request to
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timeout: :obj:`int`, optional
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Timeout in seconds
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Returns
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-------
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str
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Return value of the executed smart contract
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Raises
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------
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InvalidRPCReplyError
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If received unknown result from endpoint, or
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API Reference
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-------------
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https://api.hmny.io/?version=latest#d34b1f82-9b29-4b68-bac7-52fa0a8884b1
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"""
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params = [
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{
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'to': to,
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'from': from_address,
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'gas': gas,
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'gasPrice': gas_price,
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'value': value,
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'data': data
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},
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block_num
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]
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method = 'hmyv2_call'
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try:
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return rpc_request(method, params=params, endpoint=endpoint, timeout=timeout)['result']
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except KeyError as e:
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raise InvalidRPCReplyError(method, endpoint) from e
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def estimate_gas(to, from_address=None, gas=None, gas_price=None, value=None, data=None,
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endpoint=_default_endpoint, timeout=_default_timeout) -> int:
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"""
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Estimate the gas price needed for a smart contract call
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Parameters
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----------
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to: :obj:`str`
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Address of the smart contract
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from_address: :obj:`str`, optional
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Wallet address
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gas: :obj:`str`, optional
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Gas to execute the smart contract (in hex)
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gas_price: :obj:`str`, optional
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Gas price to execute smart contract call (in hex)
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value: :obj:`str`, optional
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Value sent with the smart contract call (in hex)
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data: :obj:`str`, optional
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Hash of smart contract method and parameters
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endpoint: :obj:`str`, optional
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Endpoint to send request to
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timeout: :obj:`int`, optional
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Timeout in seconds
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Returns
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-------
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int
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Estimated gas price of smart contract call
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Raises
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------
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InvalidRPCReplyError
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If received unknown result from endpoint, or
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API Reference
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-------------
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https://api.hmny.io/?version=latest#b9bbfe71-8127-4dda-b26c-ff95c4c22abd
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"""
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params = [ {
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'to': to,
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'from': from_address,
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'gas': gas,
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'gasPrice': gas_price,
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'value': value,
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'data': data
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} ]
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method = 'hmyv2_estimateGas'
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try:
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return int(rpc_request(method, params=params, endpoint=endpoint, timeout=timeout)['result'], 16)
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except KeyError as e:
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raise InvalidRPCReplyError(method, endpoint) from e
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def get_code(address, block_num, endpoint=_default_endpoint, timeout=_default_timeout) -> str:
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"""
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Get the code stored at the given address in the state for the given block number
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Parameters
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----------
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address: :obj:`str`
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Address of the smart contract
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block_num: :obj:`int`
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Block number to get the code for
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endpoint: :obj:`str`, optional
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Endpoint to send request to
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timeout: :obj:`int`, optional
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Timeout in seconds
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Returns
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-------
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str
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Byte code at the smart contract address for the given block
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Raises
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------
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InvalidRPCReplyError
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If received unknown result from endpoint, or
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API Reference
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-------------
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https://api.hmny.io/?version=latest#e13e9d78-9322-4dc8-8917-f2e721a8e556
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https://github.com/harmony-one/harmony/blob/1a8494c069dc3f708fdf690456713a2411465199/rpc/contract.go#L59
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"""
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params = [
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address,
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block_num
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]
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method = 'hmyv2_getCode'
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try:
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return rpc_request(method, params=params, endpoint=endpoint, timeout=timeout)['result']
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except KeyError as e:
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raise InvalidRPCReplyError(method, endpoint) from e
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def get_storage_at(address, key, block_num, endpoint=_default_endpoint, timeout=_default_timeout) -> str:
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"""
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Get the storage from the state at the given address, the key and the block number
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Parameters
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----------
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address: :obj:`str`
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Address of the smart contract
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key: :obj:`str`
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Hex representation of the storage location
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block_num: :obj:`int`
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Block number to get the code for
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endpoint: :obj:`str`, optional
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Endpoint to send request to
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timeout: :obj:`int`, optional
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Timeout in seconds
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Returns
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-------
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str
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Data stored at the smart contract location
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Raises
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------
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InvalidRPCReplyError
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If received unknown result from endpoint, or
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API Reference
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-------------
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https://api.hmny.io/?version=latest#fa8ac8bd-952d-4149-968c-857ca76da43f
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https://github.com/harmony-one/harmony/blob/1a8494c069dc3f708fdf690456713a2411465199/rpc/contract.go#L84
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"""
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params = [
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address,
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key,
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block_num
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]
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method = 'hmyv2_getStorageAt'
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try:
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return rpc_request(method, params=params, endpoint=endpoint, timeout=timeout)['result']
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except KeyError as e:
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raise InvalidRPCReplyError(method, endpoint) from e
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def get_contract_address_from_hash(tx_hash, endpoint=_default_endpoint, timeout=_default_timeout) -> str:
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"""
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Get address of the contract which was deployed in the transaction
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represented by tx_hash
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Parameters
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----------
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tx_hash: :obj:`str`
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Hash of the deployment transaction
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endpoint: :obj:`str`, optional
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Endpoint to send request to
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timeout: :obj:`int`, optional
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Timeout in seconds
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Returns
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-------
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str
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Address of the smart contract
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Raises
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------
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InvalidRPCReplyError
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If received unknown result from endpoint, or
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API Reference
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-------------
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https://github.com/harmony-one/harmony-test/blob/master/localnet/rpc_tests/test_contract.py#L36
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"""
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try:
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return get_transaction_receipt(tx_hash, endpoint, timeout)["contractAddress"]
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except KeyError as e:
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raise InvalidRPCReplyError(method, endpoint) from e
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