import { BaseConnector } from '../../base/base.connector';
import type { IEmailOptions, IEmailProvider, ISendMessageSuccessResponse, WithPassthrough, EmailSendInput, EmailSendResult, IEmailConnector } from '../../types';
import { ChannelTypeEnum } from '../../types';
import type { SendgridConfig } from './sendgrid.config';
export declare class SendgridEmailConnector extends BaseConnector implements IEmailProvider, IEmailConnector {
    private config;
    readonly id = "sendgrid";
    readonly channelType: ChannelTypeEnum.EMAIL;
    constructor(config: SendgridConfig, fetchImpl?: typeof fetch);
    /**
     * Thinwrap-native send. Implements `IEmailConnector`.
     * Builds the SendGrid v3 `mail/send` JSON body in snake_case wire shape and
     * POSTs to `https://api.sendgrid.com/v3/mail/send` with `Authorization: Bearer
     * <apiKey>`. SendGrid is the canonical example: the connector explicitly
     * invokes `transformKeys(_passthrough.body, CasingEnum.SNAKE_CASE)` before
     * `mergePassthrough` so consumer-supplied camelCase keys (e.g.,
     * `dynamicTemplateData`) land as snake_case (`dynamic_template_data`) in the
     * wire body. Headers and query are HTTP-/URL-level and pass through verbatim.
     */
    send(input: EmailSendInput): Promise<EmailSendResult>;
    /**
     * Build the SendGrid v3 `mail/send` wire body from Thinwrap's `EmailSendInput`.
     * Hand-mapped in snake_case (locality) — the hand-building IS the
     * casing transform for the connector-built portion of the body.
     */
    private buildSendgridBody;
    /**
     * Map SendGrid error responses to canonical `ConnectorError` with the 6-value
     * `ProviderCode` union. Parses `Retry-After`:
     * parsed seconds embedded in `providerMessage` text; raw header value on
     * `cause.retryAfter`. No structured `retryAfterSeconds` field per
     * Retry is consumer policy (no retryAfterSeconds field).
     */
    private mapVendorError;
    sendMessage(options: IEmailOptions, bridgeProviderData?: WithPassthrough<Record<string, unknown>>): Promise<ISendMessageSuccessResponse>;
}