qortal-ui/qortal-ui-crypto/api/transactions/TransactionBase.js

'use strict';
import { TX_TYPES, QORT_DECIMALS } from '../constants.js'
import nacl from '../deps/nacl-fast.js'
import Base58 from '../deps/Base58.js'
import utils from '../deps/utils.js'

export default class TransactionBase {
    static get utils() {
        return utils
    }
    static get nacl() {
        return nacl
    }
    static get Base58() {
        return Base58
    }

    constructor() {
        // Defaults
        this.fee = 0
        this.groupID = 0
        this.timestamp = Date.now()
        this.tests = [
            () => {
                if (!(this._type >= 1 && this._type in TX_TYPES)) {
                    return 'Invalid type: ' + this.type
                }
                return true
            },
            () => {
                if (this._fee < 0) {
                    return 'Invalid fee: ' + this._fee / QORT_DECIMALS
                }
                return true
            },
            () => {
                if (this._groupID < 0 || !Number.isInteger(this._groupID)) {
                    return 'Invalid groupID: ' + this._groupID
                }
                return true
            },
            () => {
                if (!(new Date(this._timestamp)).getTime() > 0) {
                    return 'Invalid timestamp: ' + this._timestamp
                }
                return true
            },
            () => {
                if (!(this._lastReference instanceof Uint8Array && this._lastReference.byteLength == 64)) {
                    return 'Invalid last reference: ' + this._lastReference
                }
                return true
            },
            () => {
                if (!(this._keyPair)) {
                    return 'keyPair must be specified'
                }
                if (!(this._keyPair.publicKey instanceof Uint8Array && this._keyPair.publicKey.byteLength === 32)) {
                    return 'Invalid publicKey'
                }
                if (!(this._keyPair.privateKey instanceof Uint8Array && this._keyPair.privateKey.byteLength === 64)) {
                    return 'Invalid privateKey'
                }
                return true
            }
        ]
    }

    set keyPair(keyPair) {
        this._keyPair = keyPair
    }
    set type(type) {
        this.typeText = TX_TYPES[type]
        this._type = type
        this._typeBytes = this.constructor.utils.int32ToBytes(this._type)
    }
    set groupID(groupID) {
        this._groupID = groupID
        this._groupIDBytes = this.constructor.utils.int32ToBytes(this._groupID)
    }
    set timestamp(timestamp) {
        this._timestamp = timestamp
        this._timestampBytes = this.constructor.utils.int64ToBytes(this._timestamp)
    }
    set fee(fee) {
        this._fee = fee * QORT_DECIMALS
        this._feeBytes = this.constructor.utils.int64ToBytes(this._fee)
    }
    set lastReference(lastReference) { // Always Base58 encoded. Accepts Uint8Array or Base58 string.
        // lastReference could be a string or an Uint8Array
        this._lastReference = lastReference instanceof Uint8Array ? lastReference : this.constructor.Base58.decode(lastReference)
    }
    get params() {
        return [
            this._typeBytes,
            this._timestampBytes,
            this._groupIDBytes,
            this._lastReference,
            this._keyPair.publicKey
        ]
    }
    get signedBytes() {
        if (!this._signedBytes) {
            this.sign()
        }
        return this._signedBytes
    }

    // render function but NOT lit element
    render(html) {
        return html`render method to display requested transaction info`
    }

    validParams() {
        let finalResult = {
            valid: true
        }
        // const valid =
        this.tests.some(test => {
            const result = test()
            if (result !== true) {
                finalResult = {
                    valid: false,
                    message: result
                }
                return true // exists the loop
            }
        })
        return finalResult
    }

    generateBase() {
        const isValid = this.validParams()
        if (!isValid.valid) {
            throw new Error(isValid.message)
        }
        let result = new Uint8Array()

        this.params.forEach(item => {
            result = this.constructor.utils.appendBuffer(result, item)
        })

        this._base = result
        return result
    }

    sign() {
        if (!this._keyPair) {
            throw new Error('keyPair not defined')
        }

        if (!this._base) {
            this.generateBase()
        }

        this._signature = this.constructor.nacl.sign.detached(this._base, this._keyPair.privateKey)

        this._signedBytes = this.constructor.utils.appendBuffer(this._base, this._signature)

        return this._signature
    }
}