qortal-ui/qortal-ui-crypto/api/transactions/reward-share/RewardShareTransaction.js

import publicKeyToAddress from '../../wallet/publicKeyToAddress.js'

"use strict";
import TransactionBase from "../TransactionBase.js"
import nacl from '../../deps/nacl-fast.js'
import ed2curve from '../../deps/ed2curve.js'
import { Sha256 } from 'asmcrypto.js'

export default class RewardShareTransaction extends TransactionBase {
    constructor() {
        super()
        this.type = 38
    }

    render(html) {
        return html`
            Would you like to create a reward share transaction, sharing <strong>${this._percentageShare / 1e8}%</strong> of your minting rewards with <strong>${this.constructor.Base58.encode(this._recipient)}</strong>? 
            If yes, you will need to save the key below in order to mint. It can be supplied to any node in order to allow it to mint on your behalf.
            <div style="background:#eee; padding:8px; margin:8px 0; border-radius:2px;">
                <span>${this._base58RewardShareSeed}</span>
            </div>
            On pressing confirm, the rewardshare will be created, but you will still need to supply the above key to a node in order to mint with the account.
        `
    }

    set recipientPublicKey(recipientPublicKey) {
        this._base58RecipientPublicKey = recipientPublicKey instanceof Uint8Array ? this.constructor.Base58.encode(recipientPublicKey) : recipientPublicKey
        this._recipientPublicKey = this.constructor.Base58.decode(this._base58RecipientPublicKey)

        this.recipient = publicKeyToAddress(this._recipientPublicKey)

        this.fee = (recipientPublicKey === this.constructor.Base58.encode(this._keyPair.publicKey) ? 0 : 0.001)

        // Reward share keys
        const convertedPrivateKey = ed2curve.convertSecretKey(this._keyPair.privateKey)
        const convertedPublicKey = ed2curve.convertPublicKey(this._recipientPublicKey)
        const sharedSecret = new Uint8Array(32);
        nacl.lowlevel.crypto_scalarmult(sharedSecret, convertedPrivateKey, convertedPublicKey);
        this._rewardShareSeed = new Sha256().process(sharedSecret).finish().result
        this._base58RewardShareSeed = this.constructor.Base58.encode(this._rewardShareSeed)

        this._rewardShareKeyPair = nacl.sign.keyPair.fromSeed(this._rewardShareSeed)
    }

    set recipient(recipient) { // Always Base58 encoded. Accepts Uint8Array or Base58 string.
        this._recipient = recipient instanceof Uint8Array ? recipient : this.constructor.Base58.decode(recipient)
    }

    set percentageShare(share) {
        this._percentageShare = share * 100
        this._percentageShareBytes = this.constructor.utils.int64ToBytes(this._percentageShare)
    }

    get params() {
        const params = super.params
        params.push(
            this._recipient,
            this._rewardShareKeyPair.publicKey,
            this._percentageShareBytes,
            this._feeBytes
        )
        return params;
    }
}