diff options
Diffstat (limited to 'packages/contract-wrappers')
| -rw-r--r-- | packages/contract-wrappers/src/fetchers/asset_balance_and_proxy_allowance_fetcher.ts | 132 |
1 files changed, 87 insertions, 45 deletions
diff --git a/packages/contract-wrappers/src/fetchers/asset_balance_and_proxy_allowance_fetcher.ts b/packages/contract-wrappers/src/fetchers/asset_balance_and_proxy_allowance_fetcher.ts index d10cffe57..376004f52 100644 --- a/packages/contract-wrappers/src/fetchers/asset_balance_and_proxy_allowance_fetcher.ts +++ b/packages/contract-wrappers/src/fetchers/asset_balance_and_proxy_allowance_fetcher.ts @@ -1,8 +1,9 @@ // tslint:disable:no-unnecessary-type-assertion import { AbstractBalanceAndProxyAllowanceFetcher, assetDataUtils } from '@0x/order-utils'; -import { AssetProxyId, ERC20AssetData, ERC721AssetData } from '@0x/types'; +import { AssetProxyId, ERC20AssetData, ERC721AssetData, MultiAssetData } from '@0x/types'; import { BigNumber } from '@0x/utils'; import { BlockParamLiteral } from 'ethereum-types'; +import * as _ from 'lodash'; import { ERC20TokenWrapper } from '../contract_wrappers/erc20_token_wrapper'; import { ERC721TokenWrapper } from '../contract_wrappers/erc721_token_wrapper'; @@ -18,60 +19,101 @@ export class AssetBalanceAndProxyAllowanceFetcher implements AbstractBalanceAndP } public async getBalanceAsync(assetData: string, userAddress: string): Promise<BigNumber> { const decodedAssetData = assetDataUtils.decodeAssetDataOrThrow(assetData); - if (decodedAssetData.assetProxyId === AssetProxyId.ERC20) { - const decodedERC20AssetData = decodedAssetData as ERC20AssetData; - const balance = await this._erc20Token.getBalanceAsync(decodedERC20AssetData.tokenAddress, userAddress, { - defaultBlock: this._stateLayer, - }); - return balance; - } else { - const decodedERC721AssetData = decodedAssetData as ERC721AssetData; - const tokenOwner = await this._erc721Token.getOwnerOfAsync( - decodedERC721AssetData.tokenAddress, - decodedERC721AssetData.tokenId, - { + let balance: BigNumber | undefined; + switch (decodedAssetData.assetProxyId) { + case AssetProxyId.ERC20: + const decodedERC20AssetData = decodedAssetData as ERC20AssetData; + balance = await this._erc20Token.getBalanceAsync(decodedERC20AssetData.tokenAddress, userAddress, { defaultBlock: this._stateLayer, - }, - ); - const balance = tokenOwner === userAddress ? new BigNumber(1) : new BigNumber(0); - return balance; + }); + break; + case AssetProxyId.ERC721: + const decodedERC721AssetData = decodedAssetData as ERC721AssetData; + const tokenOwner = await this._erc721Token.getOwnerOfAsync( + decodedERC721AssetData.tokenAddress, + decodedERC721AssetData.tokenId, + { + defaultBlock: this._stateLayer, + }, + ); + balance = tokenOwner === userAddress ? new BigNumber(1) : new BigNumber(0); + break; + case AssetProxyId.MultiAsset: + // The `balance` for MultiAssetData is the total units of the entire `assetData` that are held by the `userAddress`. + for (const [ + index, + nestedAssetDataElement, + ] of (decodedAssetData as MultiAssetData).nestedAssetData.entries()) { + const nestedAmountElement = (decodedAssetData as MultiAssetData).amounts[index]; + const nestedAssetBalance = (await this.getBalanceAsync( + nestedAssetDataElement, + userAddress, + )).dividedToIntegerBy(nestedAmountElement); + if (_.isUndefined(balance) || nestedAssetBalance.lessThan(balance)) { + balance = nestedAssetBalance; + } + } + break; + default: + throw new Error(`Proxy with id ${decodedAssetData.assetProxyId} not supported`); } + return balance as BigNumber; } public async getProxyAllowanceAsync(assetData: string, userAddress: string): Promise<BigNumber> { const decodedAssetData = assetDataUtils.decodeAssetDataOrThrow(assetData); - if (decodedAssetData.assetProxyId === AssetProxyId.ERC20) { - const decodedERC20AssetData = decodedAssetData as ERC20AssetData; - const proxyAllowance = await this._erc20Token.getProxyAllowanceAsync( - decodedERC20AssetData.tokenAddress, - userAddress, - { - defaultBlock: this._stateLayer, - }, - ); - return proxyAllowance; - } else { - const decodedERC721AssetData = decodedAssetData as ERC721AssetData; - - const isApprovedForAll = await this._erc721Token.isProxyApprovedForAllAsync( - decodedERC721AssetData.tokenAddress, - userAddress, - { - defaultBlock: this._stateLayer, - }, - ); - if (isApprovedForAll) { - return new BigNumber(this._erc20Token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS); - } else { - const isApproved = await this._erc721Token.isProxyApprovedAsync( + let proxyAllowance: BigNumber | undefined; + switch (decodedAssetData.assetProxyId) { + case AssetProxyId.ERC20: + const decodedERC20AssetData = decodedAssetData as ERC20AssetData; + proxyAllowance = await this._erc20Token.getProxyAllowanceAsync( + decodedERC20AssetData.tokenAddress, + userAddress, + { + defaultBlock: this._stateLayer, + }, + ); + break; + case AssetProxyId.ERC721: + const decodedERC721AssetData = decodedAssetData as ERC721AssetData; + const isApprovedForAll = await this._erc721Token.isProxyApprovedForAllAsync( decodedERC721AssetData.tokenAddress, - decodedERC721AssetData.tokenId, + userAddress, { defaultBlock: this._stateLayer, }, ); - const proxyAllowance = isApproved ? new BigNumber(1) : new BigNumber(0); - return proxyAllowance; - } + if (isApprovedForAll) { + return new BigNumber(this._erc20Token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS); + } else { + const isApproved = await this._erc721Token.isProxyApprovedAsync( + decodedERC721AssetData.tokenAddress, + decodedERC721AssetData.tokenId, + { + defaultBlock: this._stateLayer, + }, + ); + proxyAllowance = isApproved ? new BigNumber(1) : new BigNumber(0); + } + break; + case AssetProxyId.MultiAsset: + // The `proxyAllowance` for MultiAssetData is the total units of the entire `assetData` that the proxies have been approved to spend by the `userAddress`. + for (const [ + index, + nestedAssetDataElement, + ] of (decodedAssetData as MultiAssetData).nestedAssetData.entries()) { + const nestedAmountElement = (decodedAssetData as MultiAssetData).amounts[index]; + const nestedAssetAllowance = (await this.getProxyAllowanceAsync( + nestedAssetDataElement, + userAddress, + )).dividedToIntegerBy(nestedAmountElement); + if (_.isUndefined(proxyAllowance) || nestedAssetAllowance.lessThan(proxyAllowance)) { + proxyAllowance = nestedAssetAllowance; + } + } + break; + default: + throw new Error(`Proxy with id ${decodedAssetData.assetProxyId} not supported`); } + return proxyAllowance as BigNumber; } } |