Compute solidity types from an arbitrary JS object so that we can use eth_signTypedData (EIP-712) with arbitrary objects
EUPL-1.2 License
Compute solidity types from an arbitrary JS object so that we can use eth_signTypedData (EIP-712) with arbitrary objects.
@juanelas/solidity-types-from-json
can be imported to your project with npm
:
npm install @juanelas/solidity-types-from-json
Then either require (Node.js CJS):
const solidityTypesFromJson = require('@juanelas/solidity-types-from-json')
or import (JavaScript ES module):
import * as solidityTypesFromJson from '@juanelas/solidity-types-from-json'
The appropriate version for browser or node should be automatically chosen when importing. However, if your bundler does not import the appropriate module version (node esm, node cjs or browser esm), you can force it to use a specific one by just importing one of the followings:
@juanelas/solidity-types-from-json/dist/cjs/index.node
: for Node.js CJS module@juanelas/solidity-types-from-json/dist/esm/index.node
: for Node.js ESM module@juanelas/solidity-types-from-json/dist/esm/index.browser
: for browser ESM moduleIf you are coding TypeScript, types will not be automatically detected when using the specific versions. You can easily get the types in by creating and importing to your TS project a new types declaration file
solidity-types-from-json.d.ts
with the following line:declare module '@juanelas/solidity-types-from-json/dist/esm/index.browser' // use the specific module file you are importing
You can also download browser ESM, IIFE and UMD bundles directly from the releases' page and manually add them to your project.
const exampleObject = {
name: 'Alice',
age: 30,
isActive: true,
ethAddress: '0xe688b84b23f322a994A53dbF8E15FA82CDB71127',
address: {
street: '123 Main St',
city: 'Wonderland',
arr: [2, 3],
obj: {
a: 1,
b: false
}
},
scores: [100, 200, 300],
preferences: [
{ key: 'color', value: 'blue' },
{ key: 'size', value: 'medium' }
],
arrAlt: [
{ a: 4, b: true }
]
}
const {mainType, types} = solidityTypesFromJson.jsonToSolidityTypes(exampleObject, { mainTypeName: 'JWT' })
// mainType = 'JWT'
// types = {
// Obj: [{ name: 'a', type: 'uint256' }, { name: 'b', type: 'bool' }],
// Address: [
// { name: 'street', type: 'string' },
// { name: 'city', type: 'string' },
// { name: 'arr', type: 'uint256[]' },
// { name: 'obj', type: 'Obj' }
// ],
// Preference: [
// { name: 'key', type: 'string' },
// { name: 'value', type: 'string' }
// ],
// ArrAltItem: [{ name: 'a', type: 'uint256' }, { name: 'b', type: 'bool' }],
// JWT: [
// { name: 'name', type: 'string' },
// { name: 'age', type: 'uint256' },
// { name: 'isActive', type: 'bool' },
// { name: 'ethAddress', type: 'address' },
// { name: 'address', type: 'Address' },
// { name: 'scores', type: 'uint256[]' },
// { name: 'preferences', type: 'Preference[]' },
// { name: 'arrAlt', type: 'ArrAltItem[]' }
// ]
// }