# Financiar escrow

## Esquema

Isso valida um formulário de escrow usando Zod, incluindo endereços de carteira e valor.

```typescript
import { z } from "zod";

export const formSchema = z.object({
  contractId: z.string().min(1, "ID do contrato é obrigatório"),
  signer: z.string().min(1, "Endereço do signatário é obrigatório"),
  amount: z.string().min(1, {
    message: "Valor é obrigatório.",
  }),
});

```

## Hook Personalizado

Isto contém toda a lógica do formulário, incluindo validação do esquema, função onSubmit e outros estados e funcionalidades.

```typescript
import { useEscrowContext } from "@/providers/escrow.provider";
import { useWalletContext } from "@/providers/wallet.provider";
import { useState } from "react";
import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import { z } from "zod";
import { formSchema } from "../schemas/fund-escrow-form.schema";
import { escrowService } from "../services/escrow.service";
import { toast } from "sonner";
import { Escrow } from "@/@types/escrows/escrow.entity";
import { EscrowRequestResponse } from "@/@types/escrows/escrow-response.entity";
import { FundEscrowPayload } from "@/@types/escrows/escrow-payload.entity";

export const useFundEscrowForm = () => {
  const { escrow } = useEscrowContext();
  const { setEscrow } = useEscrowContext();
  const { walletAddress } = useWalletContext();
  const [loading, setLoading] = useState(false);
  const [response, setResponse] = useState<EscrowRequestResponse | null>(null);
  const [error, setError] = useState<string | null>(null);

  const form = useForm<z.infer<typeof formSchema>>({
    resolver: zodResolver(formSchema),
    defaultValues: {
      contractId: escrow?.contractId || "",
      amount: escrow?.amount?.toString() || "1000",
      signer: walletAddress || "Conecte sua carteira para obter seu endereço",
    },
  });

  const onSubmit = async (payload: FundEscrowPayload) => {
    setLoading(true);
    setError(null);
    setResponse(null);

    try {
      /**
       * Chamada de API usando o serviço de escrow
       * @Observação:
       * - Precisamos especificar o endpoint e o método
       * - Precisamos especificar que returnEscrowDataIsRequired é false
       * - O resultado será um EscrowRequestResponse
       */
      const result = (await escrowService.execute({
        payload,
        endpoint: "/escrow/fund-escrow",
        method: "post",
        returnEscrowDataIsRequired: false,
      })) as EscrowRequestResponse;

      /**
       * @Respostas:
       * result.status === "SUCCESS"
       * - Escrow financiado com sucesso
       * - Definir o escrow no contexto
       * - Mostrar um toast de sucesso
       *
       * result.status !== "SUCCESS"
       * - Mostrar um toast de erro
       */
      if (result.status === "SUCCESS") {
        // Validar saldo para evitar saldos negativos no contexto de escrow
        const escrowUpdated: Escrow = {
          ...escrow!,
          balance:
            escrow?.balance && Number(escrow.balance) > 0
              ? (Number(escrow.balance) + Number(payload.amount)).toString()
              : payload.amount,
        };

        setEscrow(escrowUpdated);

        toast.info("Escrow Financiado");
        setResponse(result);
      }
    } catch (err) {
      toast.error(
        err instanceof Error ? err.message : "Ocorreu um erro desconhecido"
      );
    } finally {
      setLoading(false);
    }
  };

  return { form, loading, response, error, onSubmit };
};

```

## Formulário

Este formulário é construído com react hook form. Usamos o hook personalizado e o esquema zod mencionados anteriormente.

```typescript
"use client";

import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import {
  Form,
  FormField,
  FormItem,
  FormLabel,
  FormControl,
  FormMessage,
} from "@/components/ui/form";

import { useFundEscrowForm } from "../../hooks/fund-escrow-form.hook";
import { useEscrowContext } from "@/providers/escrow.provider";
import { ResponseDisplay } from "@/components/utils/response-display";

export function FundEscrowForm() {
  const { form, loading, response, onSubmit } = useFundEscrowForm();
  const { escrow } = useEscrowContext();

  return (
    <div className="space-y-6">
      <Form {...form}>
        <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
          <FormField
            control={form.control}
            name="contractId"
            render={({ field }) => (
              <FormItem>
                <FormLabel>ID do Contrato / Escrow</FormLabel>
                <FormControl>
                  <Input
                    placeholder="CAZ6UQX7..."
                    {...field}
                    disabled={!!escrow?.contractId}
                  />
                </FormControl>
                <FormMessage />
              </FormItem>
            )}
          />

          <FormField
            control={form.control}
            name="signer"
            render={({ field }) => (
              <FormItem>
                <FormLabel>Endereço do Signatário</FormLabel>
                <FormControl>
                  <Input disabled placeholder="GSIGN...XYZ" {...field} />
                </FormControl>
                <FormMessage />
              </FormItem>
            )}
          />

          <FormField
            control={form.control}
            name="amount"
            render={({ field }) => (
              <FormItem>
                <FormLabel>Valor</FormLabel>
                <FormControl>
                  <Input
                    disabled={Number(escrow?.balance) >= Number(escrow?.amount)}
                    type="text"
                    {...field}
                  />
                </FormControl>
                <FormMessage />
              </FormItem>
            )}
          />

          <Button type="submit" className="w-full" disabled={loading}>
            {loading ? "Financiando..." : "Financiar Escrow"}
          </Button>
        </form>
      </Form>

      <ResponseDisplay response={response} />
    </div>
  );
}

```


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