metamask-extension/ui/app/constants/transactions.js

export const UNAPPROVED_STATUS = 'unapproved'
export const REJECTED_STATUS = 'rejected'
export const APPROVED_STATUS = 'approved'
export const SIGNED_STATUS = 'signed'
export const SUBMITTED_STATUS = 'submitted'
export const CONFIRMED_STATUS = 'confirmed'
export const FAILED_STATUS = 'failed'
export const DROPPED_STATUS = 'dropped'

export const TOKEN_METHOD_TRANSFER = 'transfer'
export const TOKEN_METHOD_APPROVE = 'approve'
export const TOKEN_METHOD_TRANSFER_FROM = 'transferfrom'

export const SEND_ETHER_ACTION_KEY = 'outgoing'
export const DEPLOY_CONTRACT_ACTION_KEY = 'contractDeployment'
export const APPROVE_ACTION_KEY = 'approve'
export const SEND_TOKEN_ACTION_KEY = 'outgoing'
export const TRANSFER_FROM_ACTION_KEY = 'transferFrom'