diff options
Diffstat (limited to 'src/utils/utils.ts')
| -rw-r--r-- | src/utils/utils.ts | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/utils/utils.ts b/src/utils/utils.ts index 114b46f6c..1d2e2f908 100644 --- a/src/utils/utils.ts +++ b/src/utils/utils.ts @@ -1,5 +1,8 @@ import * as _ from 'lodash'; import * as BN from 'bn.js'; +import * as ethUtil from 'ethereumjs-util'; +import * as ethABI from 'ethereumjs-abi'; +import {SolidityTypes, Order} from '../types'; export const utils = { /** @@ -22,6 +25,27 @@ export const utils = { const isValid = /^0x[0-9A-F]{64}$/i.test(orderHashHex); return isValid; }, + getOrderHashHex(order: Order, exchangeContractAddr: string) { + const orderParts = [ + {value: exchangeContractAddr, type: SolidityTypes.address}, + {value: order.maker, type: SolidityTypes.address}, + {value: order.taker, type: SolidityTypes.address}, + {value: order.makerTokenAddress, type: SolidityTypes.address}, + {value: order.takerTokenAddress, type: SolidityTypes.address}, + {value: order.feeRecipient, type: SolidityTypes.address}, + {value: utils.bigNumberToBN(order.makerTokenAmount), type: SolidityTypes.uint256}, + {value: utils.bigNumberToBN(order.takerTokenAmount), type: SolidityTypes.uint256}, + {value: utils.bigNumberToBN(order.makerFee), type: SolidityTypes.uint256}, + {value: utils.bigNumberToBN(order.takerFee), type: SolidityTypes.uint256}, + {value: utils.bigNumberToBN(order.expirationUnixTimestampSec), type: SolidityTypes.uint256}, + {value: utils.bigNumberToBN(order.salt), type: SolidityTypes.uint256}, + ]; + const types = _.map(orderParts, o => o.type); + const values = _.map(orderParts, o => o.value); + const hashBuff = ethABI.soliditySHA3(types, values); + const hashHex = ethUtil.bufferToHex(hashBuff); + return hashHex; + }, spawnSwitchErr(name: string, value: any) { return new Error(`Unexpected switch value: ${value} encountered for ${name}`); }, |