Axelar GMP (Hedera)

GMP pattern: encode a payload on the source chain, pay Axelar gas in native token, call the Gateway, then decode and act on the destination behind an allowlisted source.

Source app → BridgeSender (pay gas + gateway.callContract)
                 → Axelar relayers
                      → AxelarExecutable._execute → Handler

On Hedera, orchestration often pairs GMP with HSS (0x16b) so a contract can self-reschedule and dispatch each cycle. Keep bridge transport behind a thin sender interface so the orchestrator stays bridge-agnostic.

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