🗓 Dec 10, 2022  | 🕑 4 min | 👤  Vasil Safron

GRPC Contract for Interaction with Ethereum

Overview

This GRPC contract enables you to obtain cryptocurrency data from various blockchain networks (etherium, polygon, near, binance smart chain, tron) for use in your web3 applications.

Specifically, you can retrieve balance information and transaction history for ERC20 tokens on the Ethereum blockchain.

Table of contents

• Latest Version
• Usage
• Available Methods
• Example: Retrieving Transaction History on Etherium blockchain
• Example: Retrieving Balance Information on Etherium blockchain

Latest Version

You can access the latest version of the contract here:

wget https://raw.githubusercontent.com/cryptomation/grpc-contract/main/universal-api.proto
copy 

Usage

To use the contract, follow these steps:

• First you need to create api keys for needed network here: 👉 CryptoMation/Console
• Download proto file from this repository: 👉 CryptoMation/grpc-contract
• Compile proto file with grpc compiler: 👉 protoc --go_out=plugins=grpc:. universal-api.proto

Available Methods

• getBalance - retrieves the balance of an account in the network.
• getTransactions - retrieves the transaction history (include erc20) of an account in the network.

Example: Retrieving Transaction History on Etherium blockchain

⚠ Possible values for network param: near, near-testnet, near-mainnet, etherium, polygon, tron

⚠ Note that you must have grpcurl to run this example.

grpcurl -plaintext -d '{"api_key": "insert_you_api_key", "network":"ethereum", "address": "0xdec0de7e6ed3ee7bb3a2c0baae7827d101d1ec20"}' grpc.cryptomation.com com.cryptomation.universal.api.v1.grpc.UniversalCryptoApi/getTransactions
copy 

Example: Retrieving Balance Information on Etherium blockchain

⚠ Possible values for network param: near, near-testnet, near-mainnet, etherium, polygon, tron

⚠ Note that you must have grpcurl to run this example.

grpcurl -plaintext -d '{"api_key": "insert_you_api_key", "network":"etherium", "address": "0xdec0de7e6ed3ee7bb3a2c0baae7827d101d1ec20"}' grpc.cryptomation.com com.cryptomation.universal.api.v1.grpc.UniversalCryptoApi/getBalance
copy 

More info?

Much more info about our API method you could found on our docs!

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