🔐 Security

Only web cryptography standards applied

Each block must be signed using the private key assigned to each user or entity, adding the signature attribute to the block.

  block = {
    prevHash: block.prevHash,
    height: block.height,
    version: block.version,
    data: block.data,
    timestamp: block.timestamp,
    scope: block.scope,
    by: block.by,
    signature: ...,
    hash: ...,
  };

The final step is to generate the block's SHA256 hash and attach it to the hash attribute.

These steps are automated using the https://www.npmjs.com/package/@guerrerocarlos/blockchainlib library: Example usage:

const pathToKey = "./KEY.priv.key";
const blockContent = "TEST";

const signedBlock = await clientSign(
  "ENTITY",
  "SCOPE",
  blockContent, // BLOCK CONTENT
  pathToKey // PATH TO LOCAL KEY
);

const submitResult = await submitBlock(signedBlock);
console.log("submitResult", submitResult);
console.log(await confirmBlock(signedBlock.hash));

Example results:

{
  prevHash: '12512a748535f9b28b727570d9cb6b',
  height: 15,
  version: 2,
  data: 'TEST',
  timestamp: 16847615,
  scope: 'SCOPE',
  signature: 'fR7loT8CLTOuf/KxvEeCaRGurqRATMtiPJSZ8q2IQ==',
  by: 'ENTITY',
  signature: 'bcags98cays90opib3ug97...kopmlnjbhvyft6r7t9'
  hash: '875457b166809e2a64e1abc74568fa820ef3'
}