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rpc.ts
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rpc.ts
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const randomId = () => Math.floor(Math.random() * 10000000000);
export const send = (provider: any, method: string, params?: any[]) => new Promise<any>((resolve, reject) => {
const payload = {
id: randomId(),
method,
params,
};
const callback = (err: any, result: any) => {
if (err) {
reject(err);
} else if (result.error) {
console.error(result.error);
reject(result.error);
} else {
resolve(result.result);
}
};
let _provider = provider.provider || provider
if (_provider.sendAsync) {
_provider.sendAsync(payload, callback);
} else {
_provider.send(payload, callback);
}
});
export interface RSV {
r: string;
s: string;
v: number;
}
export const signData = async (provider: any, fromAddress: string, typeData: any): Promise<RSV> => {
const _typeData = typeof typeData === 'string' ? typeData : JSON.stringify(typeData);
const result = await send(provider, 'eth_signTypedData_v4', [fromAddress, _typeData]);
return {
r: result.slice(0, 66),
s: '0x' + result.slice(66, 130),
v: parseInt(result.slice(130, 132), 16),
};
};
let chainIdOverride: null | number = null;
export const setChainIdOverride = (id: number) => { chainIdOverride = id };
export const getChainId = async (provider: any): Promise<any> => chainIdOverride || send(provider, 'eth_chainId');
export const call = (provider: any, to: string, data: string) => send(provider, 'eth_call', [{
to,
data,
}, 'latest']);