Horizon v0.20.0

If you want to use experimental ingestion skip this version and use v0.20.1 instead. v0.20.0 has a performance issue.

Changes

• Experimental ingestion system is now run concurrently on all Horizon servers (with feature flag set - see below). This improves ingestion availability.
• Add experimental path finding endpoints which use an in memory order book for improved performance. To enable the endpoints set --enable-experimental-ingestion CLI param or ENABLE_EXPERIMENTAL_INGESTION=true env variable. Note that the enable-experimental-ingestion flag enables both the new path finding endpoints and the accounts for signer endpoint. There are two path finding endpoints. /paths/strict-send returns payment paths where both the source and destination assets are fixed. This endpoint is able to answer questions like: "Get me the most EUR possible for my 10 USD." /paths/strict-receive is the other endpoint which is an alias to the existing /paths endpoint.
• --enable-accounts-for-signer CLI param or ENABLE_ACCOUNTS_FOR_SIGNER=true env variable are merged with --enable-experimental-ingestion CLI param or ENABLE_EXPERIMENTAL_INGESTION=true env variable.
• Add experimental get offers by id endpoint/offers/{id} which uses the new ingestion system to fill up the offers table. To enable it, set --enable-experimental-ingestion CLI param or ENABLE_EXPERIMENTAL_INGESTION=true env variable.

Scheduled Breaking Changes

• fee_paid field on Transaction resource has been deprecated and will be removed in 0.22.0. Please use new fields added in 0.18.0: max_fee that defines the maximum fee the source account is willing to pay and fee_charged that defines the fee that was actually paid for a transaction. See CAP-0005 for more information. This change has been previously scheduled for 0.19.0 release.
• The following operation type names have been deprecated: manage_offer and create_passive_offer. The names will be changed to: manage_sell_offer and create_passive_offer in 0.22.0. This has been previously scheduled for 0.19.0 release.
• The type for the following attributes will be changed from int64 to string in 0.22.0:
  • Attribute offer_id in manage buy offer and manage sell offer operations.
  • Attribute offer_id in Trade effect.
  • Attribute id in Offer resource.
  • Attribute timestamp and trade_count in Trade Aggregation resource.

If you are an SDK maintainer, update your code to prepare for this change.