/**
 * Protobuf Encoding Helpers
 *
 * Low-level utilities for encoding protobuf wire format:
 * - Varint encoding (wire type 0)
 * - Length-delimited encoding (wire type 2)
 * - Fixed-width encoding (wire types 1, 5)
 * - google.protobuf.Value encoding for dynamic JSON-like data
 */
/**
 * Encode a varint (variable-length integer) for protobuf
 * Supports both number and bigint for large values
 */
export declare function encodeVarint(value: number | bigint): Uint8Array;
/**
 * Encode a string field in protobuf format
 * Field format: (field_number << 3) | wire_type
 * String wire type = 2 (length-delimited)
 */
export declare function encodeStringField(fieldNumber: number, value: string): Uint8Array;
/**
 * Encode a uint32 field (varint, wire type 0)
 */
export declare function encodeUint32Field(fieldNumber: number, value: number): Uint8Array;
/**
 * Encode an int32 field (varint, wire type 0)
 */
export declare function encodeInt32Field(fieldNumber: number, value: number): Uint8Array;
/**
 * Encode an int64 field (varint, wire type 0)
 */
export declare function encodeInt64Field(fieldNumber: number, value: bigint): Uint8Array;
/**
 * Encode a nested message field (length-delimited, wire type 2)
 */
export declare function encodeMessageField(fieldNumber: number, data: Uint8Array): Uint8Array;
/**
 * Encode a bool field (varint, wire type 0)
 */
export declare function encodeBoolField(fieldNumber: number, value: boolean): Uint8Array;
/**
 * Encode a double field (64-bit, wire type 1)
 */
export declare function encodeDoubleField(fieldNumber: number, value: number): Uint8Array;
/**
 * Concatenate multiple Uint8Arrays into one
 */
export declare function concatBytes(...arrays: Uint8Array[]): Uint8Array;
/**
 * Encode a JavaScript value as google.protobuf.Value
 *
 * google.protobuf.Value oneof:
 *   field 1: null_value (enum NullValue)
 *   field 2: number_value (double)
 *   field 3: string_value (string)
 *   field 4: bool_value (bool)
 *   field 5: struct_value (Struct)
 *   field 6: list_value (ListValue)
 */
export declare function encodeProtobufValue(value: unknown): Uint8Array;
/**
 * Debug helper: dump protobuf bytes as hex string
 */
export declare function hexDump(data: Uint8Array): string;