Types

type ChainKey = "ethereum" | "arbitrum" | string;

type Token = {
  symbol: string;        // "USDC"
  address: `0x${string}`; // on that chain
  decimals: number;
  name?: string;
};

type SupportedChains = Record<ChainKey, {
  chainId: number;
  rpcUrl?: string;
  nativeSymbol: string; // "ETH"
}>;

type IntentCreateParams = {
  fromChain: ChainKey;
  toChain: ChainKey;

  inputToken: Token | string; // only token symbol is also enough
  outputToken: Token | string;
  inputAmount: string; // human string e.g. "100.1"

  receiver?: `0x${string}`; // default signer address
  slippageBps?: number;     // default 30 (0.30%)
  deadlineSecs?: number;    // default 300

  confidential?: boolean;   // v1 preview

  actions?: Action[];       // v1 limited hooks
};

type Action =
  {
      type: "contractCall";
      chain: ChainKey;              // usually toChain
      contract: `0x${string}`;
      abiFragment: string;          // minimal ABI string for the method
      method: string;
      args: unknown[];
      value?: string;               // optional native value
  } | {
      type: "noop";                 // placeholder for future
  };

type Offer = {
  id: string;
  relayer: `0x${string}`;
  outputAmount: string;     // human string in output token units
  feeAmount?: string;
  etaSeconds?: number;
  expiresAt: string;        // ISO
  signature: `0x${string}`
};