Create an account with the transfer open strategy

The transfer open strategy allows the creation of new accounts without requiring payment of registration fees. Instead, users must transfer a specific amount of tokens to a non-existent account. You can configure this amount by modifying the value of the min_amount property in the chromia.yml file. For detailed information, consult the relevant section in the Dapp Monetization course.

To enable the transfer open strategy for account registration, you need to make the following changes in the chromia.yml file:

chromia.yml

blockchains:
  transfer-open:
    module: main
    moduleArgs:
      lib.ft4.core.accounts.strategies.transfer:
        rules:
          - sender_blockchain: x"1203A19CC7DE2431E18AA1D055753931ABAE5F564E6BC9F99C86184ADDF56763"
            sender: "X"
            recipient: "X"
            asset:
              issuing_blockchain_rid: x"1203A19CC7DE2431E18AA1D055753931ABAE5F564E6BC9F99C86184ADDF56763"
              name: "Test"
              min_amount: 10000000L
            timeout_days: 15
            strategy: "open"

compile:
  rellVersion: 0.13.5

database:
  schema: schema_transfer_open

test:
  modules:
    - test
  moduleArgs:
    lib.ft4.core.accounts.strategies.transfer:
      rules:
        - sender_blockchain: x"0000000000000000000000000000000000000000000000000000000000000000"
          sender: "*"
          recipient: "*"
          asset:
            issuing_blockchain_rid: x"0000000000000000000000000000000000000000000000000000000000000000"
            name: "Test"
            min_amount: 10000000L
          timeout_days: 15
          strategy: "open"
    lib.ft4.core.admin:
      admin_pubkey: "020E362CD8F8A94F2DB470564E667BD906812BC4ABB1C075650E3787E711B779D7"
libs:
  ft4:
    registry: https://bitbucket.org/chromawallet/ft3-lib
    path: rell/src/lib/ft4
    tagOrBranch: v0.8.0r
    rid: x"B6AE6AC82AC735BFB9E4E412FFB76BF95380E94F371F5F6A14E71A3AA7D5FEF6"
    insecure: false

To complete the process, you'll also need to register a token and send it to a non-existent account for activation as shown in the code example below.

Additionally, don't forget to specify the asset icon URL for the registered token in the src/main.rell file as displayed below:

src/main.rell

module;

import lib.ft4.accounts.strategies.transfer.open;
import lib.ft4.assets.{ asset, Unsafe };

object dapp_meta {
    asset = Unsafe.register_asset("Test", "TST", 6, chain_context.blockchain_rid, "https://url-to-asset-icon");
}

For a complete code example, refer to the Cookbook repository.