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Algorand Specifications

Starting from Version 2, the AVM can run programs in two modes:

1. Logic Signature (or stateless) mode, used to execute Logic Signatures;

2. Application (or stateful) mode, used to execute Smart Contracts.

Differences between modes include:

• The maximum allowed program size, defined by the following Ledger parameters:

  • LSigmaxLSigmax
  • Appprog,t,maxAppprog,t,max
  • Apppage,maxApppage,max

• The maximum allowed program cost, defined by the following Ledger parameters:

  • LSigc,maxLSigc,max
  • Appc,maxAppc,max

• Opcode availability (refer to the Opcodes Specifications for details).

• Some Global Fields are only available in Application mode.

• Only Applications can observe transaction effects, such as Logs or IDs allocated to ASAs or new Applications.