Publish new subgraph

// Ethereum account of the subgraph owner
const ethereumAccount = 0xbeb123....

// you need to upload the version metadata object to IPFS
const versionData = {
  label: "v0.0.1",
  description: "can be empty"
}

// IPFS Qm hash of the file with version metadata
const versionHash = uploadToIpfs(versionData)

// you need to upload subgraph metadata object to IPFS
const subgraphData = {
  description: "My cool subgraph",
  image: "https://images/myimage.png",
  displayName: "Cool subgraph",
  codeRepository: "can be empty",
  website: "can be empty"
}

// IPFS Qm hash of the file with subgraph metadata
const subgraphHash = uploadToIpfs(subgraphData)

// Contract function to call
contractGNS.publishNewSubgraph(
  ethereumAccount,
  ipfsHexHash(version.deploymentId),
  ipfsHexHash(versionHash),
  ipfsHexHash(subgraphHash)
)

// ipfsHexHash is a helper that converts IPFS Qm.. hash into 0x123
export const ipfsHexHash = (ipfsHash: string) => {
  const base58 = base('123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz')
  return '0x' + base58.decode(ipfsHash).slice(2).toString('hex')
}