Interledger Dynamic Configuration Protocol (IL-DCP)

Client sends a transfer to the host:

{
  amount: '0',
  executionCondition: '[SHA256(32 zero bytes)]',
  expiresAt: '[Five second timeout]',
  ilp: {
    account: 'peer.config',
    data: '[ConfigurationRequest]'
  }
}

The ConfigurationRequest is simply an empty buffer. The host should ignore any bytes in this buffer.

The host will:

Notice the ILP address is 'peer.config' and treat the packet as a dynamic configuration request (IL-DCP request)
Verify that it is a host (two clients may end up querying one another), otherwise reject with error type = 1
Verify the amount is zero, otherwise reject with error type = 0
Verify that the condition matches [SHA256(0)], otherwise reject with error type = 0
Assign a name to the client (or determine the client's name based on authentication information)
Fulfill the transfer with a ConfigurationFulfillment

IMPORTS
    Address,
    AddressCharset
    FROM InterledgerTypes
;

ConfigurationRequest ::= SEQUENCE {
  -- empty
}

ConfigurationFulfillment ::= SEQUENCE {
  -- Client's ILP address
  clientAddress Address
}

ConfigurationRejection ::= SEQUENCE {
  -- Error type
  type UInt8
}

Error types

0 .. Invalid request
1 .. I am not a host

justmoon/IL-DCP.md

Interledger Dynamic Configuration Protocol (IL-DCP)

Error types