Python client for Ethereum using the JSON-RPC interface
- complete: implements all 62 JSON-RPC methods
- provides a high-level interface to create contracts on the blockchain and to call contract methods
The API is not yet stable, so please use caution when upgrading.
$ pip install ethjsonrpcMake sure to have a node running an Ethereum client (such as geth) for the library to connect to.
>>> from ethjsonrpc import EthJsonRpc
>>> c = EthJsonRpc('127.0.0.1', 8545)
>>> c.net_version()
u'1'
>>> c.web3_clientVersion()
u'Geth/v1.3.3/linux/go1.5.1'
>>> c.eth_gasPrice()
50000000000
>>> c.eth_blockNumber()
828948These examples assume the following simple Solidity contract:
contract Example {
string s;
function set_s(string new_s) {
s = new_s;
}
function get_s() returns (string) {
return s;
}
}Compile it like this:
$ solc --binary stdout example.sol>>> compiled = '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'
>>> from ethjsonrpc import EthJsonRpc
>>> c = EthJsonRpc('127.0.0.1', 8545)>>> # continued from above
>>> contract_tx = c.create_contract(c.eth_coinbase(), compiled, gas=300000)
>>> # wait here for the contract to be created when a new block is mined
>>> contract_addr = c.get_contract_address(contract_tx)
>>> contract_addr
u'0x24988147f2f2300450103d8c42c43182cf226857'>>> # continued from above
>>> tx = c.call_with_transaction(c.eth_coinbase(), contract_addr, 'set_s(string)', ['Hello, world'])
>>> tx
u'0x15bde63d79466e3db5169a913bb2069130ca387033d2ff2e29f4dfbef1bc6e0d'>>> # continued from above
>>> results = c.call(contract_addr, 'get_s()', [], ['string'])
>>> results
['Hello, world']Please see test.py for additional examples.
- web3_clientVersion
- web3_sha3
- net_version
- net_listening
- net_peerCount
- eth_protocolVersion
- eth_syncing
- eth_coinbase
- eth_mining
- eth_hashrate
- eth_gasPrice
- eth_accounts
- eth_blockNumber
- eth_getBalance
- eth_getStorageAt
- eth_getTransactionCount
- eth_getBlockTransactionCountByHash
- eth_getBlockTransactionCountByNumber
- eth_getUncleCountByBlockHash
- eth_getUncleCountByBlockNumber
- eth_getCode
- eth_sign
- eth_sendTransaction
- eth_sendRawTransaction
- eth_call
- eth_estimateGas
- eth_getBlockByHash
- eth_getBlockByNumber
- eth_getTransactionByHash
- eth_getTransactionByBlockHashAndIndex
- eth_getTransactionByBlockNumberAndIndex
- eth_getTransactionReceipt
- eth_getUncleByBlockHashAndIndex
- eth_getUncleByBlockNumberAndIndex
- eth_getCompilers
- eth_compileSolidity
- eth_compileLLL
- eth_compileSerpent
- eth_newFilter
- eth_newBlockFilter
- eth_newPendingTransactionFilter
- eth_uninstallFilter
- eth_getFilterChanges
- eth_getFilterLogs
- eth_getLogs
- eth_getWork
- eth_submitWork
- eth_submitHashrate
- db_putString
- db_getString
- db_putHex
- db_getHex
- shh_version
- shh_post
- shh_newIdentity
- shh_hasIdentity
- shh_newGroup
- shh_addToGroup
- shh_newFilter
- shh_uninstallFilter
- shh_getFilterChanges
- shh_getMessages