Babel - Ethereum API - IoTeX Developer Documentation

Babel is the IoTeX service that wraps an Ethereum-node JSON-RPC API: you can point your Ethereum libraries and tools to a Babel endpoint, and have them work with the IoTeX blockchain with no changes. 
json-rpc
Ethereum Wiki
Official Ethereum JSON-RPC API Documentation
You can either deploy a Babel service (available on GitHub) and point it to your own IoTeX Gateway node, or you can use the publicly accessible endpoints listed below. 
Chain ID
The chainID chain identifier was introduced in EIP-155 to prevent replay attacks between Ethereum-compatible chains, it is a way to tell chains apart. Subsequent to EIP-155, Ethereum was assigned a chainID of 1. 
In respect of this EIP, IoTeX chainIDs have been picked as follow:
Network
chainID
IoTeX Mainnet
4689
IoTeX Testnet
4690
Babel API endpoints
Mainnet
Endpoint
Provider
More
https://babel-api.mainnet.iotex.io
IoTeX Foundation
​https://iotex.io​
https://babel-api.mainnet.iotex.one
IoTeX Foundation
​https://iotex.io​
https://iotexrpc.com
Ankr
​https://iotexrpc.com​
https://rpc.ankr.com/iotex
Ankr
​https://ankr.com​
https://iotex-rpc.gateway.pokt.network
Pocket Network
​https://www.pokt.network​
Testnet
Endpoint
Text
More
https://babel-api.testnet.iotex.io
IoTeX Foundation
​https://iotex.io​
Example
To get the balance of the IoTeX address ukzv5m6xnsg3gzaec3shew8nw03cch2x53d6v6 you first convert it into the ethereum address format using ioctl:
$ ioctl account ethaddr io1ukzv5m6xnsg3gzaec3shew8nw03cch2x53d6v6
io1ukzv5m6xnsg3gzaec3shew8nw03cch2x53d6v6 - 0xE584ca6F469c11140Bb9c4617Cb8f373E38C5D46
which gives you the following Ethereum address:0xE584ca6F469c11140Bb9c4617Cb8f373E38C5D46. 
Then you can query the Babel endpoint according to the Ethereum JSON RPC API: 
» curl -X POST -H "Content-Type:application/json" --data '{"id": 1, "jsonrpc": "2.0", "method": "eth_getBalance", "params": ["0xE584ca6F469c11140Bb9c4617Cb8f373E38C5D46", ""]}' http://babel-api.mainnet.iotex.io
{
  "id": 1,
  "jsonrpc": "2.0",
  "result": "0x10f0cf064dd59200000"
}
Which returns the balance 0x10f0cf064dd59200000 (hex) for the address, expressed in Rau units (i.e. 5000000000000000000000 Rau, equivalent to 5000 IOTX).
Check out the official Ethereum JSON-RPC API Documentation at:
json-rpc
Ethereum Wiki
Official Ethereum JSON-RPC API Documentation
Supported API
Below is the list of the currently supported APIs:
eth_accounts
 eth_blockNumber
 eth_call
 eth_chainId
 eth_estimateGas
 eth_gasPrice
 eth_getBalance
 eth_getBlockByHash
 eth_getBlockByNumber
 eth_getBlockTransactionCountByHash
 eth_getBlockTransactionCountByNumber
 eth_getCode
 eth_getFilterChanges
 eth_getFilterLogs
 eth_getLogs
 eth_getStorageAt
 eth_getTransactionByBlockHashAndIndex
 eth_getTransactionByBlockNumberAndIndex
 eth_getTransactionByHash
 eth_getTransactionCount
 eth_getTransactionReceipt
 eth_hashrate
 eth_mining
 eth_newBlockFilter
 eth_newFilter
 eth_protocolVersion
 eth_sendRawTransaction
 eth_syncing
 eth_uninstallFilter
 net_listening
 net_peerCount
 net_version
 web3_clientVersion
Additional API methods support can be requested by posting an issue in the GitHub repository below:
Issues · iotexproject/iotex-core
GitHub
​

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