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import { BigNumber } from '@0xproject/utils';
import BN = require('bn.js');
import ethUtil = require('ethereumjs-util');
import * as Web3 from 'web3';
import { AssetProxyId } from './types';
export function encodeAssetProxyId(assetProxyId: AssetProxyId): Buffer {
const formattedAssetProxyId = new BN(assetProxyId);
const encodedAssetProxyId = ethUtil.toUnsigned(formattedAssetProxyId);
return encodedAssetProxyId;
}
export function encodeAddress(address: string): Buffer {
if (!ethUtil.isValidAddress(address)) {
throw new Error(`Invalid Address: ${address}`);
}
const encodedAddress = ethUtil.toBuffer(address);
return encodedAddress;
}
export function encodeUint256(value: BigNumber): Buffer {
const formattedValue = new BN(value.toString(10));
const encodedValue = ethUtil.toUnsigned(formattedValue);
return encodedValue;
}
export function encodeERC20ProxyMetadata_V1(tokenAddress: string) {
// Encode metadata
const encodedAssetProxyId = encodeAssetProxyId(AssetProxyId.ERC20_V1);
const encodedAddress = encodeAddress(tokenAddress);
const encodedMetadata = Buffer.concat([encodedAssetProxyId, encodedAddress]);
const encodedMetadataHex = ethUtil.bufferToHex(encodedMetadata);
return encodedMetadataHex;
}
export function encodeERC20ProxyMetadata(tokenAddress: string) {
// Encode metadata
const encodedAssetProxyId = encodeAssetProxyId(AssetProxyId.ERC20);
const encodedAddress = encodeAddress(tokenAddress);
const encodedMetadata = Buffer.concat([encodedAssetProxyId, encodedAddress]);
const encodedMetadataHex = ethUtil.bufferToHex(encodedMetadata);
return encodedMetadataHex;
}
export function encodeERC721ProxyMetadata(tokenAddress: string, tokenId: BigNumber) {
// Encode metadata
const encodedAssetProxyId = encodeAssetProxyId(AssetProxyId.ERC721);
const encodedAddress = encodeAddress(tokenAddress);
const encodedTokenId = encodeUint256(tokenId);
const encodedMetadata = Buffer.concat([encodedAssetProxyId, encodedAddress, encodedTokenId]);
const encodedMetadataHex = ethUtil.bufferToHex(encodedMetadata);
return encodedMetadataHex;
}
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