@titan-suite/aion-to-graphql
Create a graphql server to AION smart contracts
Last updated 2 years ago by khullar .
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$ cnpm install @titan-suite/aion-to-graphql 
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ABI to GraphQL Schema

This will consume an ABI object created when deploying a Solidity Smart contract, and return a graphql schema and resolver. This object can be plugged into a the graphql server of your choice.

Usage:

Install the package with npm or yarn.

    // with yarn (recommended)
    yarn add @titan-suite/aion-to-graphql

    // with npm
    npm install @titan-suite/aion-to-graphql
  1. Once installed,You will also have to specify global.mainAccount and global.gas to withdraw gas from.

  2. You can now create your own graphql server. This means you pass in the Abi , contract instance, Main Account, Gas. Example: { artifact: abi, contract: web3.eth.contract(abi).at(address), mainAccount: web3.personal.listAccounts[0], gas:1500000 }

Example Usage

Checkout the examples in file aion-server.js , test/aion.test.js.

Please note that these examples requires creating a config.js in the root directory with format as follows:

const web3Address = 'REMOTE_NODE_ADDRESS' const mainAccountPass = 'MAIN_ACCOUNT_PASSWORD' module.exports = { web3Address, mainAccountPass }

To Learn More

Checkout Titan IDE

This package will return the schema and rootValue that you can pass into your GraphQL server.

Base Types

We have two base types that help us convert some AION int/uint and Bytes into graphQL schema types. The first is for ints/uints. Whenever a function returns these types, you will have the option of returning either the string and/or int type.

    type Value {
    string: String
    int: Int
    }

The second base type are the bytes types.

    type Bytes {
    raw: String
    decoded: String
    }

When a function returns a bytes, you can choose to return the raw data or the decoded data if desired.

Return Type Templates

Because we are auto generating the Schema, we have to define some standard conversions. We have two templates for accessing the return values from solidity:

  1. Single: ${typeName}_${IndexOfReturn}
  2. Arrays: ${typeName}Arr_${IndexOfReturn}

If you return an address as the third return value you would use: address_2. If you return a uint in the fourth value you would use uint256_3. If you return an array of bytes as the first return you would use bytes32Arr_0.

Writing Queries

To write a query, you must use the function name as the base, pass any variables if any, and then the type name with an index (${typeName}_${IndexOfOutput})

Writing Mutations

To write a mutation, you must use the function name as the base, pass any variables if any. After a Mutation succeeds you will have access to transaction receipt object with keys such blockNumber, blockHash

Inspired By Ethereum-to-GraphQL.

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