feat: update gateway for v3

Signed-off-by: Gregory Hill <[email protected]>

sdk/package.json

@@ -32,6 +32,7 @@
     "@scure/base": "^1.1.7",
     "@scure/btc-signer": "^1.3.2",
     "bitcoin-address-validation": "^2.2.3",
-    "bitcoinjs-lib": "^6.1.6"
+    "bitcoinjs-lib": "^6.1.6",
+    "ethers": "^6.13.2"
   }
 }

sdk/src/gateway/client.ts

@@ -0,0 +1,194 @@
+import { ethers, AbiCoder } from "ethers";
+import { GatewayQuoteParams } from "./types";
+import { TOKENS } from "./tokens";
+
+type EvmAddress = string;
+
+type GatewayQuote = {
+    gatewayAddress: EvmAddress;
+    dustThreshold: number;
+    satoshis: number;
+    fee: number;
+    gratuity: string;
+    bitcoinAddress: string;
+    txProofDifficultyFactor: number;
+    strategyAddress: EvmAddress | null,
+};
+
+type GatewayCreateOrderRequest = {
+    gatewayAddress: EvmAddress,
+    strategyAddress: EvmAddress | null,
+    satsToConvertToEth: number,
+    userAddress: EvmAddress,
+    gatewayExtraData: string | null,
+    strategyExtraData: string | null,
+    satoshis: number,
+};
+
+type GatewayOrderResponse = {
+    gatewayAddress: EvmAddress;
+    tokenAddress: EvmAddress;
+    txid: string;
+    status: boolean;
+    timestamp: number;
+    tokens: string;
+    satoshis: number;
+    fee: number;
+    txProofDifficultyFactor: number;
+};
+
+type GatewayCreateOrderResponse = {
+    uuid: string,
+    opReturnHash: string,
+};
+
+type GatewayStartOrderResult = GatewayCreateOrderResponse & {
+    bitcoinAddress: string,
+    satoshis: number;
+};
+
+/**
+ * Base url for the mainnet Gateway API.
+ * @default "https://gateway-api-mainnet.gobob.xyz"
+ */
+export const MAINNET_GATEWAY_BASE_URL = "https://gateway-api-mainnet.gobob.xyz";
+
+/**
+ * Base url for the testnet Gateway API.
+ * @default "https://gateway-api-testnet.gobob.xyz"
+ */
+export const TESTNET_GATEWAY_BASE_URL = "https://gateway-api-testnet.gobob.xyz";
+
+export class GatewayApiClient {
+    private baseUrl: string;
+
+    constructor(networkOrUrl: string = "mainnet") {
+        switch (networkOrUrl) {
+            case "mainnet":
+                this.baseUrl = MAINNET_GATEWAY_BASE_URL;
+                break;
+            case "testnet":
+                this.baseUrl = TESTNET_GATEWAY_BASE_URL;
+                break;
+            default:
+                this.baseUrl = networkOrUrl;
+        }
+    }
+
+    async getQuote(params: GatewayQuoteParams): Promise<GatewayQuote> {
+        const isMainnet = params.toChain == "bob" || params.toChain == 60808;
+
+        let outputToken = "";
+        if (params.toToken.startsWith("0x")) {
+            outputToken = params.toToken;
+        } else if (params.toToken in TOKENS) {
+            outputToken = isMainnet ? TOKENS[params.toToken].bob : TOKENS[params.toToken].bob_sepolia;
+        } else {
+            throw new Error('Unknown output token');
+        }
+
+        const atomicAmount = params.amount;
+        const response = await fetch(`${this.baseUrl}/quote/${outputToken}/${atomicAmount || ''}`, {
+            headers: {
+                'Content-Type': 'application/json',
+                Accept: 'application/json'
+            }
+        });
+
+        return await response.json();
+    }
+
+    // TODO: add error handling
+    async startOrder(gatewayQuote: GatewayQuote, params: GatewayQuoteParams): Promise<GatewayStartOrderResult> {
+        const request: GatewayCreateOrderRequest = {
+            gatewayAddress: gatewayQuote.gatewayAddress,
+            strategyAddress: gatewayQuote.strategyAddress,
+            satsToConvertToEth: params.gasRefill,
+            userAddress: params.toUserAddress,
+            // TODO: figure out how to get extra data
+            gatewayExtraData: null,
+            strategyExtraData: null,
+            satoshis: gatewayQuote.satoshis,
+        };
+
+        const response = await fetch(`${this.baseUrl}/order`, {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+                Accept: 'application/json'
+            },
+            body: JSON.stringify(request)
+        });
+
+        if (!response.ok) {
+            throw new Error('Failed to create order');
+        }
+
+        const data: GatewayCreateOrderResponse = await response.json();
+        // NOTE: could remove this check but good for sanity
+        if (data.opReturnHash != calculateOpReturnHash(request)) {
+            throw new Error('Invalid OP_RETURN hash');
+        }
+
+        return {
+            uuid: data.uuid,
+            opReturnHash: data.opReturnHash,
+            bitcoinAddress: gatewayQuote.bitcoinAddress,
+            satoshis: gatewayQuote.satoshis,
+        }
+    }
+
+    async finalizeOrder(orderUuid: string, bitcoinTx: string) {
+        const response = await fetch(`${this.baseUrl}/order/${orderUuid}`, {
+            method: 'PATCH',
+            headers: {
+                'Content-Type': 'application/json',
+                Accept: 'application/json'
+            },
+            body: JSON.stringify({ bitcoinTx: bitcoinTx })
+        });
+
+        if (!response.ok) {
+            throw new Error('Failed to update order');
+        }
+    }
+
+    async getOrders(userAddress: EvmAddress): Promise<GatewayOrderResponse[]> {
+        const response = await fetch(`${this.baseUrl}/orders/${userAddress}`, {
+            method: 'GET',
+            headers: {
+                'Content-Type': 'application/json',
+                Accept: 'application/json'
+            }
+        });
+
+        return response.json();
+    }
+
+    async getTokens(): Promise<EvmAddress[]> {
+        const response = await fetch(`${this.baseUrl}/tokens`, {
+            method: 'GET',
+            headers: {
+                'Content-Type': 'application/json',
+                Accept: 'application/json'
+            }
+        });
+
+        return response.json();
+    }
+}
+
+function calculateOpReturnHash(req: GatewayCreateOrderRequest) {
+    const abiCoder = new AbiCoder();
+    return ethers.keccak256(abiCoder.encode(
+        ["address", "address", "uint256", "address", "bytes", "bytes"],
+        [
+            req.gatewayAddress,
+            req.strategyAddress || ethers.ZeroAddress,
+            req.satsToConvertToEth,
+            req.userAddress,
+            req.gatewayExtraData,
+            req.strategyExtraData
+        ]
+    ))
+}

sdk/src/gateway/index.ts

@@ -0,0 +1,3 @@
+
+export { GatewayApiClient } from "./client";
+export { GatewayQuoteParams } from "./types";

sdk/src/gateway/tokens.ts

@@ -0,0 +1,38 @@
+type Token = {
+    name: string,
+    bob: string,
+    bob_sepolia: string
+}
+
+export const TOKENS: { [key: string]: Token } = {
+    "tBTC": {
+        name: "tBTC v2",
+        bob: "0xBBa2eF945D523C4e2608C9E1214C2Cc64D4fc2e2",
+        bob_sepolia: "0x6744bAbDf02DCF578EA173A9F0637771A9e1c4d0",
+    },
+    "WBTC": {
+        name: "Wrapped BTC",
+        bob: "0x03C7054BCB39f7b2e5B2c7AcB37583e32D70Cfa3",
+        bob_sepolia: "0xe51e40e15e6e1496a0981f90Ca1D632545bdB519",
+    },
+    "sbtBTC": {
+        name: "sb tBTC v2",
+        bob: "0x2925dF9Eb2092B53B06A06353A7249aF3a8B139e",
+        bob_sepolia: "",
+    },
+    "sbWBTC": {
+        name: "sb Wrapped BTC",
+        bob: "0x5c46D274ed8AbCAe2964B63c0360ad3Ccc384dAa",
+        bob_sepolia: "",
+    },
+    "seTBTC": {
+        name: "Segment TBTC",
+        bob: "0xD30288EA9873f376016A0250433b7eA375676077",
+        bob_sepolia: "",
+    },
+    "seWBTC": {
+        name: "Segment WBTC",
+        bob: "0x6265C05158f672016B771D6Fb7422823ed2CbcDd",
+        bob_sepolia: "",
+    }
+}

sdk/src/gateway/types.ts

@@ -0,0 +1,32 @@
+type ChainSlug = string | number;
+type TokenSymbol = string;
+
+export interface GatewayQuoteParams {
+    /** @description Source chain slug or ID */
+    fromChain: ChainSlug;
+    /** @description Destination chain slug or ID */
+    toChain: ChainSlug;
+    /** @description Token symbol or address on source chain */
+    fromToken: TokenSymbol;
+    /** @description Token symbol or address on destination chain */
+    toToken: TokenSymbol;
+    /** @description Wallet address on source chain */
+    fromUserAddress: string;
+    /** @description Wallet address on destination chain */
+    toUserAddress: string;
+    /** @description Amount of tokens to send from the source chain */
+    amount: number | string;
+
+    /** @description Maximum slippage percentage between 0.01 and 0.03 (Default: 0.03) */
+    maxSlippage?: number;
+
+    /** @description Unique affiliate ID for tracking */
+    affiliateId?: string;
+    /** @description Optionally filter the type of routes returned */
+    type?: 'swap' | 'deposit' | 'withdraw' | 'claim';
+    /** @description The percentage of fee charged by partners in Basis Points (BPS) units. This will override the default fee rate configured via platform. 1 BPS = 0.01%. The maximum value is 1000 (which equals 10%). The minimum value is 1 (which equals 0.01%). */
+    fee?: number;
+
+    /** @description Amount of satoshis to swap for ETH */
+    gasRefill?: number,
+}