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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 | 5x 5x 5x 5x 5x 5x 5x 5x 40x 40x 40x 40x 71x 71x 1x 2x 2x 1x 4x 4x 4x 4x 4x 4x 4x 3x 4x 3x 4x 4x 4x 2x 2x 2x 2x 2x | /* * Copyright © 2019 Lisk Foundation * * See the LICENSE file at the top-level directory of this distribution * for licensing information. * * Unless otherwise agreed in a custom licensing agreement with the Lisk Foundation, * no part of this software, including this file, may be copied, modified, * propagated, or distributed except according to the terms contained in the * LICENSE file. * * Removal or modification of this copyright notice is prohibited. * */ import { validator } from '@liskhq/lisk-validator'; import { BaseTransaction, StateStore, StateStorePrepare, } from './base_transaction'; import { DELEGATE_FEE } from './constants'; import { convertToAssetError, TransactionError } from './errors'; import { Account, TransactionJSON } from './transaction_types'; export interface DelegateAsset { readonly username: string; } export const delegateAssetFormatSchema = { type: 'object', required: ['username'], properties: { username: { type: 'string', minLength: 1, maxLength: 20, format: 'username', }, }, }; export class DelegateTransaction extends BaseTransaction { public readonly asset: DelegateAsset; public readonly containsUniqueData: boolean; public static TYPE = 10; public static FEE = DELEGATE_FEE.toString(); public constructor(rawTransaction: unknown) { super(rawTransaction); const tx = (typeof rawTransaction === 'object' && rawTransaction !== null ? rawTransaction : {}) as Partial<TransactionJSON>; this.asset = (tx.asset || { delegate: {} }) as DelegateAsset; this.containsUniqueData = true; } protected assetToBytes(): Buffer { const { username } = this.asset; return Buffer.from(username, 'utf8'); } public async prepare(store: StateStorePrepare): Promise<void> { await store.account.cache([ { address: this.senderId, }, { username: this.asset.username, }, ]); } protected verifyAgainstTransactions( transactions: ReadonlyArray<TransactionJSON>, ): ReadonlyArray<TransactionError> { return transactions .filter( tx => tx.type === this.type && tx.senderPublicKey === this.senderPublicKey, ) .map( tx => new TransactionError( 'Register delegate only allowed once per account.', tx.id, '.asset.delegate', ), ); } protected validateAsset(): ReadonlyArray<TransactionError> { const schemaErrors = validator.validate( delegateAssetFormatSchema, this.asset, ); const errors = convertToAssetError( this.id, schemaErrors, ) as TransactionError[]; return errors; } protected async applyAsset( store: StateStore, ): Promise<ReadonlyArray<TransactionError>> { const errors: TransactionError[] = []; const sender = await store.account.get(this.senderId); const usernameExists = store.account.find( (account: Account) => account.username === this.asset.username, ); if (usernameExists) { errors.push( new TransactionError( `Username is not unique.`, this.id, '.asset.username', ), ); } if (sender.isDelegate || sender.username) { errors.push( new TransactionError( 'Account is already a delegate', this.id, '.asset.username', ), ); } const updatedSender = { ...sender, username: this.asset.username, vote: 0, isDelegate: 1, }; store.account.set(updatedSender.address, updatedSender); return errors; } protected async undoAsset( store: StateStore, ): Promise<ReadonlyArray<TransactionError>> { const sender = await store.account.get(this.senderId); const { username, ...strippedSender } = sender; const resetSender = { ...sender, // tslint:disable-next-line no-null-keyword - Exception for compatibility with Core 1.4 username: null, vote: 0, isDelegate: 0, }; store.account.set(strippedSender.address, resetSender); return []; } } |