syntax = "proto3";
package cosmos.tx.signing.v1beta1;

import "cosmos/crypto/multisig/v1beta1/multisig.proto";
import "google/protobuf/any.proto";

option go_package = "github.com/cosmos/cosmos-sdk/types/tx/signing";

// SignMode represents a signing mode with its own security guarantees.
//
// This enum should be considered a registry of all known sign modes
// in the Cosmos ecosystem. Apps are not expected to support all known
// sign modes. Apps that would like to support custom  sign modes are
// encouraged to open a small PR against this file to add a new case
// to this SignMode enum describing their sign mode so that different
// apps have a consistent version of this enum.
enum SignMode {
  // SIGN_MODE_UNSPECIFIED specifies an unknown signing mode and will be
  // rejected.
  SIGN_MODE_UNSPECIFIED = 0;

  // SIGN_MODE_DIRECT specifies a signing mode which uses SignDoc and is
  // verified with raw bytes from Tx.
  SIGN_MODE_DIRECT = 1;

  // SIGN_MODE_TEXTUAL is a future signing mode that will verify some
  // human-readable textual representation on top of the binary representation
  // from SIGN_MODE_DIRECT. It is currently not supported.
  SIGN_MODE_TEXTUAL = 2;

  // SIGN_MODE_DIRECT_AUX specifies a signing mode which uses
  // SignDocDirectAux. As opposed to SIGN_MODE_DIRECT, this sign mode does not
  // require signers signing over other signers' `signer_info`. It also allows
  // for adding Tips in transactions.
  //
  // Since: cosmos-sdk 0.46
  SIGN_MODE_DIRECT_AUX = 3;

  // SIGN_MODE_LEGACY_AMINO_JSON is a backwards compatibility mode which uses
  // Amino JSON and will be removed in the future.
  SIGN_MODE_LEGACY_AMINO_JSON = 127;

  // SIGN_MODE_EIP_191 specifies the sign mode for EIP 191 signing on the Cosmos
  // SDK. Ref: https://eips.ethereum.org/EIPS/eip-191
  //
  // Currently, SIGN_MODE_EIP_191 is registered as a SignMode enum variant,
  // but is not implemented on the SDK by default. To enable EIP-191, you need
  // to pass a custom `TxConfig` that has an implementation of
  // `SignModeHandler` for EIP-191. The SDK may decide to fully support
  // EIP-191 in the future.
  //
  // Since: cosmos-sdk 0.45.2
  SIGN_MODE_EIP_191 = 191;
}

// SignatureDescriptors wraps multiple SignatureDescriptor's.
message SignatureDescriptors {
  // signatures are the signature descriptors
  repeated SignatureDescriptor signatures = 1;
}

// SignatureDescriptor is a convenience type which represents the full data for
// a signature including the public key of the signer, signing modes and the
// signature itself. It is primarily used for coordinating signatures between
// clients.
message SignatureDescriptor {
  // public_key is the public key of the signer
  google.protobuf.Any public_key = 1;

  Data data = 2;

  // sequence is the sequence of the account, which describes the
  // number of committed transactions signed by a given address. It is used to prevent
  // replay attacks.
  uint64 sequence = 3;

  // Data represents signature data
  message Data {
    // sum is the oneof that specifies whether this represents single or multi-signature data
    oneof sum {
      // single represents a single signer
      Single single = 1;

      // multi represents a multisig signer
      Multi multi = 2;
    }

    // Single is the signature data for a single signer
    message Single {
      // mode is the signing mode of the single signer
      SignMode mode = 1;

      // signature is the raw signature bytes
      bytes signature = 2;
    }

    // Multi is the signature data for a multisig public key
    message Multi {
      // bitarray specifies which keys within the multisig are signing
      cosmos.crypto.multisig.v1beta1.CompactBitArray bitarray = 1;

      // signatures is the signatures of the multi-signature
      repeated Data signatures = 2;
    }
  }
}