@ledgerhq/hw-app-eth
Version:
Ledger Hardware Wallet Ethereum Application API
51 lines • 1.99 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.UniswapDecoders = void 0;
const abi_1 = require("@ethersproject/abi");
const constants_1 = require("./constants");
const swapV2Decoder = (input) => {
const [, , , addresses] = abi_1.defaultAbiCoder.decode(["address", "uint256", "uint256", "address[]", "bool"], input);
return addresses.map(address => address.toLowerCase());
};
const swapV3Decoder = (input) => {
const [, , , path] = abi_1.defaultAbiCoder.decode(["address", "uint256", "uint256", "bytes", "bool"], input);
// Path is at least 43 bytes long for 2 times 20B addresses + 3B fee in between
// Example for the pattern pattern: 20B address + 3B fee + 20B address
// more addresses can be included after another 3B space
const pathBuffer = Buffer.from(path.slice(2), "hex");
const tokens = [];
let i = 0;
while (i < pathBuffer.length) {
tokens.push(`0x${pathBuffer
.subarray(i, i + 20)
.toString("hex")
.toLowerCase()}`);
// Skip 20B address + 3B fee
i += 23;
}
return tokens;
};
const wrapEthDecoder = (input, chainId) => {
const contract = constants_1.WETH_PER_CHAIN_ID[chainId];
return contract instanceof Error ? [] : [contract.toLowerCase()];
};
const sweepDecoder = (input) => {
const [token] = abi_1.defaultAbiCoder.decode(["address", "address", "uint256"], input);
return [token.toLowerCase()];
};
const noDecoder = () => [];
exports.UniswapDecoders = {
V2_SWAP_EXACT_IN: swapV2Decoder,
V2_SWAP_EXACT_OUT: swapV2Decoder,
V3_SWAP_EXACT_IN: swapV3Decoder,
V3_SWAP_EXACT_OUT: swapV3Decoder,
WRAP_ETH: wrapEthDecoder,
UNWRAP_ETH: wrapEthDecoder,
PERMIT2_PERMIT: noDecoder,
PERMIT2_TRANSFER_FROM: noDecoder,
PERMIT2_PERMIT_BATCH: noDecoder,
PERMIT2_TRANSFER_FROM_BATCH: noDecoder,
PAY_PORTION: noDecoder,
SWEEP: sweepDecoder,
};
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