2.4.0

Version 2.4.0

New

• ABI v2.4 specification implemented

• Param in fields section extended with init: boolean

• ref(T) – new type added

• Default values for parameter types:

• • int<N> – N zero bits.
• • uint<N> – N zero bits.
• • varint<N>/varuint<N> – x zero bits, where x = [log2(N)].
• • bool – equivalent to int<N>, where N = 1.
• • tuple(T1, T2, ..., Tn) – default values for each type, i.e. D(tuple(T1, T2, ..., Tn)) = tuple(D(T1), D(T2), ..., D(Tn)), where D is defined as a function that takes ABI type and returns the corresponding default value.
• • map(K,V) – 1 zero bit, i.e. b{0}.
• • cell – reference to an empty cell, i.e. ^EmptyCell.
• • address – addr_none$00 constructor, i.e. 2 zero bits.
• • bytes – reference to an empty cell, i.e. ^EmptyCell.
• • string – reference to an empty cell, i.e. ^EmptyCell.
• • optional(T) – 1 zero bit, i.e. b{0}.
• • T[] – x{00000000} b{0}, i.e. 33 zero bits.
• • T[k] – encoded as an array with k default values of type T
• • ref(T) – reference to a cell, cell is encoded as the default value of type T.

Breaking

• data section in ABI JSON is removed.
• fixedbytes type serialization changed. Now it is limited to 127 bytes and serialized into cell
  body instead of chained cells in current cell reference