Create Beam

public shared ({ caller }) func createBeam(escrowId : EscrowId, scheduledEndDate : Time, rate : Period)
  : async Result<BeamId, ErrorCode>

While the Beam service actor has a public func to create a beam, it is restricted to the BeamEscrow canister only. The reason for that is it requires EscrowId and its EscrowContract to be created successfully first before a beam can be created.

Please refer to Beam Escrow / Create Beam EscrowContract for more details.

Same for createRelationBeam.