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Allows a token manager to set metadata uri and hash for default token of an existing token factory.

Refer to uniq-default-metadata for explanation on possible uses for default token metadata

Technical Behavior

The required authorization is the token_factory_manager as the manager is responsible for updating the data.

  • token_factory_id is required and must exist.

  • memo value has a 256 byte limitation

  • uri is required to have non-zero length

If factory has lock_hash set to true:

  • Can change the uri, but hash must remain unchanged.

  • Cannot switch between static and dynamic default token URI (more details here)

RAM usage

  • Adding uri and hash will consume certain bytes depend on how many data are added.

    • RAM usage is covered by eosio.nftram. But this action will fail if the unused RAM of eosio.nftram is less than or equal to 200MB.

    • If the RAM usage is exceed factory maximum pack size of 1920 bytes, action will fail.

  • Updating or remove meta data which result in no bytes is added, there will be no restriction.

Action Parameters

Property NameC++ TypeJavaScript TypeExample

CLI - cleos

cleos push action eosio.nft.ft setdflttkn '[1, "updating", "uri1", "fbbf2217571b6dbe2fca75b0fd3aebb5b4e247bc89e235d4d09d014bb855d1c9"]' -p manager.acc@active

JavaScript - eosjs

await api.transact(
        actions: [
                account: 'eosio.nft.ft',
                name: 'setdflttkn ',
                authorization: [{ actor: 'manager.acc', permission: 'active' }],
                data: {
                    token_factory_id: 1,
                    memo: 'set meta',
                    uri: 'uri1',
                    hash: null,
        blocksBehind: 3,
        expireSeconds: 30,