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usecase.ts
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/
usecase.ts
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import {
BaseContract,
ContractTransaction,
Overrides,
Signer,
TransactionResponse,
keccak256,
toUtf8Bytes,
} from "ethers";
import {
CreateBulkOrdersAction,
CreateOrderAction,
ExchangeAction,
OrderUseCase,
} from "../types";
import {
DefaultReturnType,
TypedContractMethod,
} from "../typechain-types/common";
export const executeAllActions = async <
T extends CreateOrderAction | CreateBulkOrdersAction | ExchangeAction,
>(
actions: OrderUseCase<T>["actions"],
) => {
for (let i = 0; i < actions.length - 1; i++) {
const action = actions[i];
if (action.type === "approval") {
const tx = await action.transactionMethods.transact();
await tx.wait();
}
}
const finalAction = actions[actions.length - 1] as T;
switch (finalAction.type) {
case "create":
return finalAction.createOrder();
case "createBulk":
return finalAction.createBulkOrders();
default:
return finalAction.transactionMethods.transact();
}
};
const instanceOfOverrides = <T extends Overrides>(
obj: Object | undefined,
): obj is T => {
const validKeys = [
"gasLimit",
"gasPrice",
"maxFeePerGas",
"maxPriorityFeePerGas",
"nonce",
"type",
"accessList",
"customData",
"ccipReadEnabled",
"value",
"blockTag",
"overrides",
];
return (
obj === undefined ||
(Object.keys(obj).length > 0 &&
Object.keys(obj).every((key) => validKeys.includes(key)))
);
};
export type ContractMethodReturnType<
T extends BaseContract,
U extends keyof T,
> = T[U] extends TypedContractMethod<any, infer Output, any> ? Output : never;
export type TransactionMethods<T = unknown> = {
buildTransaction: (overrides?: Overrides) => Promise<ContractTransaction>;
staticCall: (overrides?: Overrides) => Promise<DefaultReturnType<T>>;
estimateGas: (overrides?: Overrides) => Promise<bigint>;
transact: (overrides?: Overrides) => Promise<TransactionResponse>;
};
export const getTransactionMethods = <
T extends BaseContract,
U extends keyof T,
>(
signer: Signer | Promise<Signer>,
contract: T,
method: U,
args: T[U] extends TypedContractMethod<infer Args, any, any>
? Args | [...Args, Overrides | undefined]
: never,
domain?: string,
): TransactionMethods<ContractMethodReturnType<T, U>> => {
let initialOverrides: Overrides;
if (args?.length > 0) {
const lastArg = args[args.length - 1];
if (instanceOfOverrides(lastArg)) {
initialOverrides = lastArg;
args.pop();
}
}
const contractMethod = async (signer: Signer | Promise<Signer>) =>
(contract.connect(await signer) as T)[
method
] as T[U] extends TypedContractMethod ? T[U] : never;
const buildTransaction = async (overrides?: Overrides) => {
const mergedOverrides = { ...initialOverrides, ...overrides };
const method = await contractMethod(signer);
const populatedTransaction = await method.populateTransaction(
...[...args, mergedOverrides],
);
if (domain) {
const tag = getTagFromDomain(domain);
populatedTransaction.data = populatedTransaction.data + tag;
}
return populatedTransaction;
};
return {
staticCall: async (overrides?: Overrides) => {
const mergedOverrides = { ...initialOverrides, ...overrides };
const mergedArgs = [...args, mergedOverrides];
const method = await contractMethod(signer);
return method.staticCall(...mergedArgs);
},
estimateGas: async (overrides?: Overrides) => {
const mergedOverrides = { ...initialOverrides, ...overrides };
const mergedArgs = [...args, mergedOverrides];
const method = await contractMethod(signer);
return method.estimateGas(...mergedArgs);
},
transact: async (overrides?: Overrides) => {
const mergedOverrides = { ...initialOverrides, ...overrides };
const data = await buildTransaction(mergedOverrides);
return (await signer).sendTransaction(data);
},
buildTransaction,
};
};
export const getTagFromDomain = (domain: string) => {
return keccak256(toUtf8Bytes(domain)).slice(2, 10);
};