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userSigner.ts
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userSigner.ts
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import { ErrSignerCannotSign } from "./errors";
import { UserAddress } from "./userAddress";
import { UserSecretKey } from "./userKeys";
import { UserWallet } from "./userWallet";
interface IUserSecretKey {
sign(message: Buffer | Uint8Array): Buffer;
generatePublicKey(): IUserPublicKey;
}
interface IUserPublicKey {
toAddress(hrp?: string): { bech32(): string; };
}
/**
* ed25519 signer
*/
export class UserSigner {
protected readonly secretKey: IUserSecretKey;
constructor(secretKey: IUserSecretKey) {
this.secretKey = secretKey;
}
static fromWallet(keyFileObject: any, password: string, addressIndex?: number): UserSigner {
const secretKey = UserWallet.decrypt(keyFileObject, password, addressIndex);
return new UserSigner(secretKey);
}
static fromPem(text: string, index: number = 0) {
let secretKey = UserSecretKey.fromPem(text, index);
return new UserSigner(secretKey);
}
async sign(data: Buffer | Uint8Array): Promise<Buffer> {
try {
const signature = this.secretKey.sign(data);
return signature;
} catch (err: any) {
throw new ErrSignerCannotSign(err);
}
}
/**
* Gets the address of the signer.
*/
getAddress(hrp?: string): UserAddress {
const bech32 = this.secretKey.generatePublicKey().toAddress(hrp).bech32();
return UserAddress.newFromBech32(bech32);
}
}