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Adding server-side signing to gala connect (GalaChain#373)
* Adding server-side signing to gala connect * Serverside signing * Lint fix * Update chain-connect/src/GalachainClient.ts Co-authored-by: Jakub Dzikowski <[email protected]> * Normalize Getters/setters * Code review changes --------- Co-authored-by: Jakub Dzikowski <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| /* | ||
| * Copyright (c) Gala Games Inc. All rights reserved. | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| import { SigningKey, computeAddress, ethers, hashMessage } from "ethers"; | ||
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|
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| import { CustomClient } from "../GalachainClient"; | ||
| import { generateEIP712Types } from "../Utils"; | ||
| import { calculatePersonalSignPrefix } from "../helpers"; | ||
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|
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| export class ServerSigningClient extends CustomClient { | ||
| get walletAddress(): string { | ||
| return this.wallet.address; | ||
| } | ||
| async getPublicKey(): Promise<{ publicKey: string; recoveredAddress: string }> { | ||
| const message = "I <3 GalaChain"; | ||
| const signedMessage = await this.wallet.signMessage(message); | ||
| const publicKey = SigningKey.recoverPublicKey(hashMessage(message), signedMessage); | ||
| const recoveredAddress = computeAddress(publicKey); | ||
| return { publicKey, recoveredAddress }; | ||
| } | ||
|
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| private wallet: ethers.Wallet; | ||
|
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| constructor(privateKey: string) { | ||
| super(); | ||
| this.wallet = new ethers.Wallet(privateKey); | ||
| } | ||
|
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| public async sign<U extends object>( | ||
| method: string, | ||
| payload: U | ||
| ): Promise<U & { signature: string; prefix: string }> { | ||
| try { | ||
| const domain = { name: "GalaChain" }; | ||
| const types = generateEIP712Types(method, payload); | ||
|
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| const prefix = calculatePersonalSignPrefix(payload); | ||
| const prefixedPayload = { ...payload, prefix }; | ||
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| const signature = await this.wallet.signTypedData(domain, types, prefixedPayload); | ||
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| return { ...prefixedPayload, signature, types, domain }; | ||
| } catch (error: unknown) { | ||
| throw new Error((error as Error).message); | ||
| } | ||
| } | ||
| } |
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