/
util.ts
77 lines (64 loc) · 1.66 KB
/
util.ts
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import BigNumber from 'bignumber.js';
import { Method } from './json-rpc-methods';
import toHex from './to-hex';
export type MethodParameter =
| boolean
| string
| number
| BigNumber
| MethodParameterObject
| MethodParameterArray;
export interface MethodParameterObject {
[key: string]: MethodParameter | undefined;
}
export interface MethodParameterArray extends Array<MethodParameter> {}
/**
* Takes a method parameter and serializes it to something that the JSON RPC accepts
* @hidden
* @param param parameter that should be serialized
*/
export function serializeToMethodParameter(param: any): MethodParameter {
switch (typeof param) {
case 'object':
if (param instanceof BigNumber) {
return toHex(param);
}
if (Array.isArray(param)) {
return param.map(serializeToMethodParameter);
}
const serializedObject: { [key: string]: MethodParameter } = {};
for (const k in param) {
if (param.hasOwnProperty(k)) {
serializedObject[k] = serializeToMethodParameter(param[k]);
}
}
return serializedObject;
case 'string':
return param;
case 'number':
return toHex(param);
case 'boolean':
return param;
default:
throw new Error('unhandled type');
}
}
/**
* Build a request for sending to the JSON RPC
* @param id of the request
* @param method method for the request
* @param params parameters to be serialized to the request
* @hidden
*/
export function buildRequest(
id: number,
method: Method,
params: MethodParameter[]
) {
return {
id,
jsonrpc: '2.0',
method,
params: serializeToMethodParameter(params)
};
}