ether

The ether package provides functions for interacting with the Ethereum network.

The details of the RPC interface along with curl examples of interacting with it are documented in the JSON RPC page on the Ethereum Wiki.

Differences in relation to the main package (datawookie/ether)

New function eth_getTokenBalance(get balance of one ETH address) Example:

eth_getTokenBalance(token_address = "0x2b591e99afe9f32eaa6214f7b7629768c40eeb39",address ="0xb96376d80a16af6700dcbaba2a459dd7856f103a")

Result: 1 'mpfr' number of precision  256   bits 
[1] 100

eth_call first step made. "Accepts to" and "data"

Object - The transaction call object
from: DATA, 20 Bytes - (optional) The address the transaction is sent from.
to: DATA, 20 Bytes - The address the transaction is directed to.
gas: QUANTITY - (optional) Integer of the gas provided for the transaction execution. eth_call consumes zero gas, but this parameter may be needed by some executions.
gasPrice: QUANTITY - (optional) Integer of the gasPrice used for each paid gas
value: QUANTITY - (optional) Integer of the value sent with this transaction
data: DATA - (optional) Hash of the method signature and encoded parameters. For details see Ethereum Contract ABI in the Solidity documentation
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter

https://eth.wiki/json-rpc/API#eth_call

Installation

Install from GitHub using

# install.packages("devtools")
devtools::install_github("PatronMaster/ether")

Alternatively there is a stable version listed on CRAN.

Example

Load the package.

library(ether)

You’ll need to connect to an Ethereum node exposing a RPC interface. By default the package will attempt to connect to a node on localhost using port 8545. However, you can also make use of the public RPC nodes hosted by infura.io. Assuming that you have created an infura.io API key and stored it in the INFURA_MAINNET_KEY environment variable.

set_rpc_address("https://mainnet.infura.io/", key = Sys.getenv("INFURA_MAINNET_KEY"))

Once you’ve configured the connection to RPC you are ready to interact with the Ethereum blockchain.

eth_blockNumber()
#> [1] 9350538

eth_gasPrice()
#> 1 'mpfr' number of precision  32   bits 
#> [1] 1000000000

eth_getBalance("0xD34DA389374CAAD1A048FBDC4569AAE33fD5a375")
#> 1 'mpfr' number of precision  60   bits 
#> [1] 247878498530503149

eth_getTransactionCount("0xD34DA389374CAAD1A048FBDC4569AAE33fD5a375")
#> [1] 1150417