Smart contract to prove the existence of documents

This contract allows you and your organisation to store documents unique identifiers in the Ethereum blockchain to prove their existance. The key advantages are anonymity, privacy, and getting a decentralized proof which can't be erased or modified by anyone (third parties or governments).

How it works

You may use ready to work builders to setup your smart contract via transaction, without compile and deploy process.

Builder name and description	Builder address	Service fee	Abi for created contract
PublicDocumentBuilder — anyone who knows the contract address can issue and revoke documents.	0x36f858d51efd7a560e280C94bDC60970E4Ee47B6	0.1 ETH	PublicDocument.json
PrivateDocumentBuilder — only contract's owner can issue and revoke documents.	0x38e46c0cfca6636084ae33629673de14d36ae44c	0.1 ETH	PrivateDocument.json
PermissionBasedDocumentBuilder — owner can authorise/deauthorise any address to allow/disallow issue and revoke documents.	0x22461c5b6b1363ff49e504b623e322a1717B4047	0.1 ETH	PermissionBasedDocument.json
PublicPayableDocumentBuilder — charges a fixed fee (goes to the contract's owner) for document issue. Anyone who knows the contract address can issue and revoke documents.	0xd909029abbd14c2ca52369979adf102f4d16d393	0.1 ETH	PublicPayableDocument.json
PermissionBasedPayableDocumentBuilder — charges a fixed fee (goes to the contract's owner) for document issue. Owner can authorise/deauthorise any address to allow/disallow issue and revoke documents.	0x7cBcE162af4986F49c9ca6eE675F582EB5106f26	0.1 ETH	PermissionBasedPayableDocument.json

Usage

• issueDocument issues a document to a recipient. Fires DocumentIssued event.
• revokeDocument revokes a document and sets a recipient as 0x0. Fires DocumentRevoked event.
• transferDocument transfers a document from the current owner to a new recipient. Fires DocumentTransfered event.
• verifyDocument verifies if the document belongs to the given recipient.
• getDocument returns document's information.
• setIssuePrice sets a fixed fee for document issue (only payable contracts). Fires NewPriceSet event.
• authorise authorises new issuer (trusted ethereum address) to issue and revoke documents. Fires Athorised event.
• deauthorise deathorises issuer. Fires Deathorised event.
• isAuthorised indicates whether issuer has been authorised.
• transferOwnership allows the current owner to transfer control of the contract to a newOwner. Fires OwnershipTransferred event.