import { ExchangeContract } from '@0x/abi-gen-wrappers';
import { schemas } from '@0x/json-schemas';
import { eip712Utils } from '@0x/order-utils';
import { Order, SignedOrder } from '@0x/types';
import { BigNumber, signTypedDataUtils } from '@0x/utils';
import _ = require('lodash');
import { assert } from './assert';
/**
* Transaction Encoder. Transaction messages exist for the purpose of calling methods on the Exchange contract
* in the context of another address. For example, UserA can encode and sign a fillOrder transaction and UserB
* can submit this to the blockchain. The Exchange context executes as if UserA had directly submitted this transaction.
*/
export class TransactionEncoder {
private readonly _exchangeInstance: ExchangeContract;
constructor(exchangeInstance: ExchangeContract) {
this._exchangeInstance = exchangeInstance;
}
/**
* Encodes the transaction data for use with the Exchange contract.
* @param data The ABI Encoded 0x Exchange method. I.e fillOrder
* @param salt A random value to provide uniqueness and prevent replay attacks.
* @param signerAddress The address which will sign this transaction.
* @return An unsigned hex encoded transaction for use in 0x Exchange executeTransaction.
*/
public getTransactionHex(data: string, salt: BigNumber, signerAddress: string): string {
const exchangeAddress = this._getExchangeContract().address;
const executeTransactionData = {
salt,
signerAddress,
data,
};
const typedData = eip712Utils.createZeroExTransactionTypedData(executeTransactionData, exchangeAddress);
const eip712MessageBuffer = signTypedDataUtils.generateTypedDataHash(typedData);
const messageHex = `0x${eip712MessageBuffer.toString('hex')}`;
return messageHex;
}
/**
* Encodes a fillOrder transaction.
* @param signedOrder An object that conforms to the SignedOrder interface.
* @param takerAssetFillAmount The amount of the order (in taker asset baseUnits) that you wish to fill.
* @return Hex encoded abi of the function call.
*/
public fillOrderTx(signedOrder: SignedOrder, takerAssetFillAmount: BigNumber): string {
assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
assert.isValidBaseUnitAmount('takerAssetFillAmount', takerAssetFillAmount);
const abiEncodedData = this._getExchangeContract().fillOrder.getABIEncodedTransactionData(
signedOrder,
takerAssetFillAmount,
signedOrder.signature,
);
return abiEncodedData;
}
/**
* Encodes a fillOrderNoThrow transaction.
* @param signedOrder An object that conforms to the SignedOrder interface.
* @param takerAssetFillAmount The amount of the order (in taker asset baseUnits) that you wish to fill.
* @return Hex encoded abi of the function call.
*/
public fillOrderNoThrowTx(signedOrder: SignedOrder, takerAssetFillAmount: BigNumber): string {
assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
assert.isValidBaseUnitAmount('takerAssetFillAmount', takerAssetFillAmount);
const abiEncodedData = this._getExchangeContract().fillOrderNoThrow.getABIEncodedTransactionData(
signedOrder,
takerAssetFillAmount,
signedOrder.signature,
);
return abiEncodedData;
}
/**
* Encodes a fillOrKillOrder transaction.
* @param signedOrder An object that conforms to the SignedOrder interface.
* @param takerAssetFillAmount The amount of the order (in taker asset baseUnits) that you wish to fill.
* @return Hex encoded abi of the function call.
*/
public fillOrKillOrderTx(signedOrder: SignedOrder, takerAssetFillAmount: BigNumber): string {
assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
assert.isValidBaseUnitAmount('takerAssetFillAmount', takerAssetFillAmount);
const abiEncodedData = this._getExchangeContract().fillOrKillOrder.getABIEncodedTransactionData(
signedOrder,
takerAssetFillAmount,
signedOrder.signature,
);
return abiEncodedData;
}
/**
* Encodes a batchFillOrders transaction.
* @param signedOrders An array of signed orders to fill.
* @param takerAssetFillAmounts The amounts of the orders (in taker asset baseUnits) that you wish to fill.
* @return Hex encoded abi of the function call.
*/
public batchFillOrdersTx(signedOrders: SignedOrder[], takerAssetFillAmounts: BigNumber[]): string {
assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
_.forEach(takerAssetFillAmounts, takerAssetFillAmount =>
assert.isBigNumber('takerAssetFillAmount', takerAssetFillAmount),
);
const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
const abiEncodedData = this._getExchangeContract().batchFillOrders.getABIEncodedTransactionData(
signedOrders,
takerAssetFillAmounts,
signatures,
);
return abiEncodedData;
}
/**
* Encodes a batchFillOrKillOrders transaction.
* @param signedOrders An array of signed orders to fill.
* @param takerAssetFillAmounts The amounts of the orders (in taker asset baseUnits) that you wish to fill.
* @return Hex encoded abi of the function call.
*/
public batchFillOrKillOrdersTx(signedOrders: SignedOrder[], takerAssetFillAmounts: BigNumber[]): string {
assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
_.forEach(takerAssetFillAmounts, takerAssetFillAmount =>
assert.isBigNumber('takerAssetFillAmount', takerAssetFillAmount),
);
const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
const abiEncodedData = this._getExchangeContract().batchFillOrKillOrders.getABIEncodedTransactionData(
signedOrders,
takerAssetFillAmounts,
signatures,
);
return abiEncodedData;
}
/**
* Encodes a batchFillOrdersNoThrow transaction.
* @param signedOrders An array of signed orders to fill.
* @param takerAssetFillAmounts The amounts of the orders (in taker asset baseUnits) that you wish to fill.
* @return Hex encoded abi of the function call.
*/
public batchFillOrdersNoThrowTx(signedOrders: SignedOrder[], takerAssetFillAmounts: BigNumber[]): string {
assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
_.forEach(takerAssetFillAmounts, takerAssetFillAmount =>
assert.isBigNumber('takerAssetFillAmount', takerAssetFillAmount),
);
const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
const abiEncodedData = this._getExchangeContract().batchFillOrdersNoThrow.getABIEncodedTransactionData(
signedOrders,
takerAssetFillAmounts,
signatures,
);
return abiEncodedData;
}
/**
* Encodes a batchCancelOrders transaction.
* @param signedOrders An array of orders to cancel.
* @return Hex encoded abi of the function call.
*/
public batchCancelOrdersTx(signedOrders: SignedOrder[]): string {
assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
const abiEncodedData = this._getExchangeContract().batchCancelOrders.getABIEncodedTransactionData(signedOrders);
return abiEncodedData;
}
/**
* Encodes a cancelOrdersUpTo transaction.
* @param targetOrderEpoch Target order epoch.
* @return Hex encoded abi of the function call.
*/
public cancelOrdersUpToTx(targetOrderEpoch: BigNumber): string {
assert.isBigNumber('targetOrderEpoch', targetOrderEpoch);
const abiEncodedData = this._getExchangeContract().cancelOrdersUpTo.getABIEncodedTransactionData(
targetOrderEpoch,
);
return abiEncodedData;
}
/**
* Encodes a cancelOrder transaction.
* @param order An object that conforms to the Order or SignedOrder interface. The order you would like to cancel.
* @return Hex encoded abi of the function call.
*/
public cancelOrderTx(order: Order | SignedOrder): string {
assert.doesConformToSchema('order', order, schemas.orderSchema);
const abiEncodedData = this._getExchangeContract().cancelOrder.getABIEncodedTransactionData(order);
return abiEncodedData;
}
/**
* Encodes a marketSellOrders transaction.
* @param signedOrders An array of signed orders to fill.
* @param takerAssetFillAmount Taker asset fill amount.
* @return Hex encoded abi of the function call.
*/
public marketSellOrdersTx(signedOrders: SignedOrder[], takerAssetFillAmount: BigNumber): string {
assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
assert.isBigNumber('takerAssetFillAmount', takerAssetFillAmount);
const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
const abiEncodedData = this._getExchangeContract().marketSellOrders.getABIEncodedTransactionData(
signedOrders,
takerAssetFillAmount,
signatures,
);
return abiEncodedData;
}
/**
* Encodes a marketSellOrdersNoThrow transaction.
* @param signedOrders An array of signed orders to fill.
* @param takerAssetFillAmount Taker asset fill amount.
* @return Hex encoded abi of the function call.
*/
public marketSellOrdersNoThrowTx(signedOrders: SignedOrder[], takerAssetFillAmount: BigNumber): string {
assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
assert.isBigNumber('takerAssetFillAmount', takerAssetFillAmount);
const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
const abiEncodedData = this._getExchangeContract().marketSellOrdersNoThrow.getABIEncodedTransactionData(
signedOrders,
takerAssetFillAmount,
signatures,
);
return abiEncodedData;
}
/**
* Encodes a maketBuyOrders transaction.
* @param signedOrders An array of signed orders to fill.
* @param makerAssetFillAmount Maker asset fill amount.
* @return Hex encoded abi of the function call.
*/
public marketBuyOrdersTx(signedOrders: SignedOrder[], makerAssetFillAmount: BigNumber): string {
assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
assert.isBigNumber('makerAssetFillAmount', makerAssetFillAmount);
const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
const abiEncodedData = this._getExchangeContract().marketBuyOrders.getABIEncodedTransactionData(
signedOrders,
makerAssetFillAmount,
signatures,
);
return abiEncodedData;
}
/**
* Encodes a maketBuyOrdersNoThrow transaction.
* @param signedOrders An array of signed orders to fill.
* @param makerAssetFillAmount Maker asset fill amount.
* @return Hex encoded abi of the function call.
*/
public marketBuyOrdersNoThrowTx(signedOrders: SignedOrder[], makerAssetFillAmount: BigNumber): string {
assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
assert.isBigNumber('makerAssetFillAmount', makerAssetFillAmount);
const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
const abiEncodedData = this._getExchangeContract().marketBuyOrdersNoThrow.getABIEncodedTransactionData(
signedOrders,
makerAssetFillAmount,
signatures,
);
return abiEncodedData;
}
/**
* Encodes a preSign transaction.
* @param hash Hash to pre-sign
* @param signerAddress Address that should have signed the given hash.
* @param signature Proof that the hash has been signed by signer.
* @return Hex encoded abi of the function call.
*/
public preSignTx(hash: string, signerAddress: string, signature: string): string {
assert.isHexString('hash', hash);
assert.isETHAddressHex('signerAddress', signerAddress);
assert.isHexString('signature', signature);
const abiEncodedData = this._getExchangeContract().preSign.getABIEncodedTransactionData(
hash,
signerAddress,
signature,
);
return abiEncodedData;
}
/**
* Encodes a setSignatureValidatorApproval transaction.
* @param validatorAddress Validator contract address.
* @param isApproved Boolean value to set approval to.
* @return Hex encoded abi of the function call.
*/
public setSignatureValidatorApprovalTx(validatorAddress: string, isApproved: boolean): string {
assert.isETHAddressHex('validatorAddress', validatorAddress);
assert.isBoolean('isApproved', isApproved);
const abiEncodedData = this._getExchangeContract().setSignatureValidatorApproval.getABIEncodedTransactionData(
validatorAddress,
isApproved,
);
return abiEncodedData;
}
private _getExchangeContract(): ExchangeContract {
return this._exchangeInstance;
}
}
