/**
 */
export interface TransactionInput {
  prevout: Buffer;
  script: Buffer;
  sequence: Buffer;
  tree?: Buffer;
}

/**
 */
export interface TransactionOutput {
  amount: Buffer;
  script: Buffer;
}

/**
 */
export interface Transaction {
  // Each transaction is prefixed by a four-byte transaction version number
  // which tells Bitcoin peers and miners which set of rules to use to validate it.
  version: Buffer;
  inputs: TransactionInput[];
  outputs?: TransactionOutput[];
  // locktime indicates the earliest time or earliest block when that transaction may
  // be added to the block chain.
  locktime?: Buffer;
  witness?: Buffer;
  // timestamp is used only for peercoin but it is no longer necessary anymore
  timestamp?: Buffer;
  // nVersionGroupId is used only for Zcash, different version of Zcash has different nVersionGroupId
  // refer to https://github.com/zcash/zcash/blob/master/src/primitives/transaction.h for more details
  nVersionGroupId?: Buffer;
  // nExpiryHeight is used only for Decred and Zcash and ZenCash.
  // It sets the block height after which transactions will be removed
  // from the mempool if they have not been mined
  // refer to https://zips.z.cash/zip-0203 for more details
  nExpiryHeight?: Buffer;
  // extraData is used only for Zcash and ZenCash and komodo
  extraData?: Buffer;
  // zCash specific
  consensusBranchId?: Buffer;
  sapling?: SaplingData;
  orchard?: OrchardData;
}

export interface TrustedInput {
  trustedInput: boolean;
  value: Buffer;
  sequence: Buffer;
}

// zCash specific
/**
 */
export interface SaplingData {
  vSpendsSapling: SaplingSpendDescriptionV5[];
  vOutputSapling: SaplingOutputDescriptionV5[];
  valueBalanceSapling: Buffer;
  anchorSapling: Buffer;
  vSpendProofsSapling: Buffer;
  vSpendAuthSigsSapling: Buffer;
  vOutputProofsSapling: Buffer;
  bindingSigSapling: Buffer;
}

export interface SaplingSpendDescriptionV5 {
  cv: Buffer;
  nullifier: Buffer;
  rk: Buffer;
}

export interface SaplingOutputDescriptionV5 {
  cv: Buffer;
  cmu: Buffer;
  ephemeralKey: Buffer;
  encCiphertext: Buffer;
  outCiphertext: Buffer;
}

export interface OrchardAction {
  cv: Buffer;
  nullifier: Buffer;
  rk: Buffer;
  cmx: Buffer;
  ephemeralKey: Buffer;
  encCiphertext: Buffer;
  outCiphertext: Buffer;
}

export interface OrchardData {
  vActions: OrchardAction[];
  flags: Buffer;
  valueBalance: Buffer;
  anchor: Buffer;
  sizeProofs: Buffer;
  proofs: Buffer;
  vSpendsAuthSigs: Buffer;
  bindingSig: Buffer;
}