Arduino & More

Overview
The blockchain client SDK is targeted to embedded devices and allows you to easily interact with the IoTeX blockchain in order to fetch blockchain data, send transactions or perform contract execution actions.
How does it work
The communication with the blockchain is done over HTTP, using the HTTP to JSON-RPC bridge at gateway.iotexlab.io.
Supported devices
Unix machines with curl support
ESP32 based boards using Arduino framework
ESP8266 based boards using Arduino framework
Nano33 IoT using Arduino framework
Arduino MKR WiFi 1010 using Arduino framework (not tested)
Porting to a new platform
Effort has been taken in trying to decouple non-platform dependant code as much as possible. However, a specific implementation of the following modules is needed when porting the library to a non supported device:
Http: the HTTP interface needs implemented. See src/http/platform_name/http.cpp for implemented platforms.
Storage: The storage class needs implemented. It contains only two methods: savePrivateKey() saves the private key, and readPrivateKey() reads the private key. See src/storage/platform_name/storage.cpp for implemented platforms.
Random: The random class needs implemented for true random number generation. It contains a single method fillRandom(), that fills a buffer with random bytes. See src/random/platform_name/random.cpp for implemented platforms.
Library architecture
Below are the main modules comprising the SDK:
Abi
Classes and functions to encode data using the Ethereum abi specification.
Account
Classes and functions to create a wallet from a private key, obtain the address and send actions to the blockchain.
Api
Classes and functions that wrap the HTTP endpoint calls to interact with the blockchain.
Connection
Classes and methods that represent a connection to the blockchain.
Contract
Classes and methods to interact with contracts.
Encoder
Classes and methods to perform different types of encoding (eg. bech32, protobuf, base64).
Http
Classes and methods to perform HTTP requests.
Protobuf
Classes and methods to handle protobuf message serialization and deserialization.
Random
Random generator implementations for each platform.
Signer
Classes and functions to sign messages.
Storage
Classes and functions to store and read the private key from persistent storage.
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